[PATCH v2 01/13] dt-bindings: soc: Add Renesas RZ/T2H (R9A09G077) SoC

[PATCH v2 01/13] dt-bindings: soc: Add Renesas RZ/T2H (R9A09G077) SoC

[Thierry Bultel]

Add RZ/T2H (R9A09G077), its variants, and the rt2h-evk evaluation board in
documentation.

Signed-off-by: Thierry Bultel <thierry.bultel.yh@bp.renesas.com>
---
 .../devicetree/bindings/soc/renesas/renesas.yaml       | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/devicetree/bindings/soc/renesas/renesas.yaml b/Documentation/devicetree/bindings/soc/renesas/renesas.yaml
index b7acb65bdecd..c1f5e0fa3c40 100644
--- a/Documentation/devicetree/bindings/soc/renesas/renesas.yaml
+++ b/Documentation/devicetree/bindings/soc/renesas/renesas.yaml
@@ -535,6 +535,16 @@ properties:
               - renesas,r9a09g057h44 # RZ/V2HP with Mali-G31 + Mali-C55 support
           - const: renesas,r9a09g057
 
+      - description: RZ/T2H (R9A09G077)
+        items:
+          - enum:
+              - renesas,r9a9g077m44-rzt2h-evk # RZ/T2H Evaluation Board
+          - enum:
+              - renesas,r9a09g077 # RZ/T2H with Quad Cortex-A55 + Dual Cortex-R52
+              - renesas,r9a09g077m04 # RZ/T2H with Single Cortex-A55 + Dual Cortex-R52 - no security
+              - renesas,r9a09g077m24 # RZ/T2H with Dual Cortex-A55 + Dual Cortex-R52 - no security
+              - renesas,r9a09g077m44 # RZ/T2H with Quad Cortex-A55 + Dual Cortex-R52 - no security
+
 additionalProperties: true
 
 ...
-- 
2.43.0

Re: [PATCH v2 01/13] dt-bindings: soc: Add Renesas RZ/T2H (R9A09G077) SoC

[Geert Uytterhoeven]

Hi Thierry,

On Mon, 17 Feb 2025 at 11:54, Thierry Bultel
<thierry.bultel.yh@bp.renesas.com> wrote:
> Add RZ/T2H (R9A09G077), its variants, and the rt2h-evk evaluation board in
> documentation.
>
> Signed-off-by: Thierry Bultel <thierry.bultel.yh@bp.renesas.com>

Thanks for your patch!

> --- a/Documentation/devicetree/bindings/soc/renesas/renesas.yaml
> +++ b/Documentation/devicetree/bindings/soc/renesas/renesas.yaml
> @@ -535,6 +535,16 @@ properties:
>                - renesas,r9a09g057h44 # RZ/V2HP with Mali-G31 + Mali-C55 support
>            - const: renesas,r9a09g057
>
> +      - description: RZ/T2H (R9A09G077)
> +        items:
> +          - enum:
> +              - renesas,r9a9g077m44-rzt2h-evk # RZ/T2H Evaluation Board
> +          - enum:
> +              - renesas,r9a09g077 # RZ/T2H with Quad Cortex-A55 + Dual Cortex-R52

"renesas,r9a09g077" should be moved as a fallback to the bottom.

> +              - renesas,r9a09g077m04 # RZ/T2H with Single Cortex-A55 + Dual Cortex-R52 - no security
> +              - renesas,r9a09g077m24 # RZ/T2H with Dual Cortex-A55 + Dual Cortex-R52 - no security
> +              - renesas,r9a09g077m44 # RZ/T2H with Quad Cortex-A55 + Dual Cortex-R52 - no security

         - const: renesas,r9a09g077

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

Re: [PATCH v2 01/13] dt-bindings: soc: Add Renesas RZ/T2H (R9A09G077) SoC

[Geert Uytterhoeven]

On Mon, 17 Feb 2025 at 11:54, Thierry Bultel
<thierry.bultel.yh@bp.renesas.com> wrote:
> Add RZ/T2H (R9A09G077), its variants, and the rt2h-evk evaluation board in
> documentation.
>
> Signed-off-by: Thierry Bultel <thierry.bultel.yh@bp.renesas.com>

> --- a/Documentation/devicetree/bindings/soc/renesas/renesas.yaml
> +++ b/Documentation/devicetree/bindings/soc/renesas/renesas.yaml
> @@ -535,6 +535,16 @@ properties:
>                - renesas,r9a09g057h44 # RZ/V2HP with Mali-G31 + Mali-C55 support
>            - const: renesas,r9a09g057
>
> +      - description: RZ/T2H (R9A09G077)
> +        items:
> +          - enum:
> +              - renesas,r9a9g077m44-rzt2h-evk # RZ/T2H Evaluation Board

renesas,rzt2h-evk

> +          - enum:
> +              - renesas,r9a09g077 # RZ/T2H with Quad Cortex-A55 + Dual Cortex-R52
> +              - renesas,r9a09g077m04 # RZ/T2H with Single Cortex-A55 + Dual Cortex-R52 - no security
> +              - renesas,r9a09g077m24 # RZ/T2H with Dual Cortex-A55 + Dual Cortex-R52 - no security
> +              - renesas,r9a09g077m44 # RZ/T2H with Quad Cortex-A55 + Dual Cortex-R52 - no security
> +
>  additionalProperties: true

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

[PATCH v2 02/13] dt-bindings: clock: Add cpg for the Renesas RZ/T2H SoC

[Thierry Bultel]

Document RZ/T2H (a.k.a r9a09g077) cpg-mssr (Clock Pulse Generator) binding.

Signed-off-by: Thierry Bultel <thierry.bultel.yh@bp.renesas.com>
---
 .../bindings/clock/renesas,cpg-mssr.yaml      |  1 +
 .../dt-bindings/clock/r9a09g077-cpg-mssr.h    | 49 +++++++++++++++++++
 2 files changed, 50 insertions(+)
 create mode 100644 include/dt-bindings/clock/r9a09g077-cpg-mssr.h

diff --git a/Documentation/devicetree/bindings/clock/renesas,cpg-mssr.yaml b/Documentation/devicetree/bindings/clock/renesas,cpg-mssr.yaml
index 77ce3615c65a..5649dee7178a 100644
--- a/Documentation/devicetree/bindings/clock/renesas,cpg-mssr.yaml
+++ b/Documentation/devicetree/bindings/clock/renesas,cpg-mssr.yaml
@@ -52,6 +52,7 @@ properties:
       - renesas,r8a779f0-cpg-mssr # R-Car S4-8
       - renesas,r8a779g0-cpg-mssr # R-Car V4H
       - renesas,r8a779h0-cpg-mssr # R-Car V4M
+      - renesas,r9a09g077-cpg-mssr # RZ/T2H
 
   reg:
     maxItems: 1
diff --git a/include/dt-bindings/clock/r9a09g077-cpg-mssr.h b/include/dt-bindings/clock/r9a09g077-cpg-mssr.h
new file mode 100644
index 000000000000..27c9cdcdf7c8
--- /dev/null
+++ b/include/dt-bindings/clock/r9a09g077-cpg-mssr.h
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+ *
+ * Copyright (C) 2025 Renesas Electronics Corp.
+ */
+
+#ifndef __DT_BINDINGS_CLOCK_RENESAS_R9A09G077_CPG_H__
+#define __DT_BINDINGS_CLOCK_RENESAS_R9A09G077_CPG_H__
+
+#include <dt-bindings/clock/renesas-cpg-mssr.h>
+
+/* R9A09G077 CPG Core Clocks */
+#define R9A09G077_CA55C0		0
+#define R9A09G077_CA55C1		1
+#define R9A09G077_CA55C2		2
+#define R9A09G077_CA55C3		3
+#define R9A09G077_SDHIHS		4
+#define R9A09G077_CLK_PLL1_ETH_PHY	5
+#define R9A09G077_CLK_OSC_ETH_PHY	6
+#define R9A09G077_CLK_ETHPHY		7
+#define R9A09G077_PCLKAH		8
+#define R9A09G077_PCLKAM		9
+#define R9A09G077_PCLKAL		10
+#define R9A09G077_CLK_SEL_ETH_PHY	11
+#define R9A09G077_DFI			12
+#define R9A09G077_PCLKH			13
+#define R9A09G077_PCLKM			14
+#define R9A09G077_PCLKL			15
+#define R9A09G077_PCLKGPTL		16
+#define R9A09G077_PCLKSHOST		17
+#define R9A09G077_PCLKRTC		18
+#define R9A09G077_USB			19
+#define R9A09G077_SPI0			20
+#define R9A09G077_SPI1			21
+#define R9A09G077_SPI2			22
+#define R9A09G077_SPI3			23
+#define R9A09G077_ETCLKA		24
+#define R9A09G077_ETCLKB		25
+#define R9A09G077_ETCLKC		26
+#define R9A09G077_ETCLKD		27
+#define R9A09G077_ETCLKE		28
+#define R9A09G077_ETHCLKE		29
+#define R9A09G077_ETHCLK_EXTAL		30
+#define R9A09G077_ETH_REFCLK		31
+#define R9A09G077_LCDC_CLKA		32
+#define R9A09G077_LCDC_CLKP		33
+#define R9A09G077_CA55			34
+#define R9A09G077_LCDC_CLKD		35
+
+#endif /* __DT_BINDINGS_CLOCK_RENESAS_R9A09G077_CPG_H__ */
-- 
2.43.0

Re: [PATCH v2 02/13] dt-bindings: clock: Add cpg for the Renesas RZ/T2H SoC

[Geert Uytterhoeven]

Hi Thierry,

On Mon, 17 Feb 2025 at 11:54, Thierry Bultel
<thierry.bultel.yh@bp.renesas.com> wrote:
> Document RZ/T2H (a.k.a r9a09g077) cpg-mssr (Clock Pulse Generator) binding.
>
> Signed-off-by: Thierry Bultel <thierry.bultel.yh@bp.renesas.com>

Thanks for your patch!

> --- a/Documentation/devicetree/bindings/clock/renesas,cpg-mssr.yaml
> +++ b/Documentation/devicetree/bindings/clock/renesas,cpg-mssr.yaml
> @@ -52,6 +52,7 @@ properties:
>        - renesas,r8a779f0-cpg-mssr # R-Car S4-8
>        - renesas,r8a779g0-cpg-mssr # R-Car V4H
>        - renesas,r8a779h0-cpg-mssr # R-Car V4M
> +      - renesas,r9a09g077-cpg-mssr # RZ/T2H
>
>    reg:
>      maxItems: 1
> diff --git a/include/dt-bindings/clock/r9a09g077-cpg-mssr.h b/include/dt-bindings/clock/r9a09g077-cpg-mssr.h
> new file mode 100644
> index 000000000000..27c9cdcdf7c8
> --- /dev/null
> +++ b/include/dt-bindings/clock/r9a09g077-cpg-mssr.h

Please include a "renesas,"-prefix in new binding definition headers.

> @@ -0,0 +1,49 @@
> +/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> + *
> + * Copyright (C) 2025 Renesas Electronics Corp.
> + */
> +
> +#ifndef __DT_BINDINGS_CLOCK_RENESAS_R9A09G077_CPG_H__
> +#define __DT_BINDINGS_CLOCK_RENESAS_R9A09G077_CPG_H__

Ah, here you do have the prefix; good!

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

[PATCH v2 03/13] dt-bindings: serial: Add compatible for Renesas RZ/T2H SoC in sci

[Thierry Bultel]

Document RZ/T2H (a.k.a r9a09g077) in SCI binding.

Signed-off-by: Thierry Bultel <thierry.bultel.yh@bp.renesas.com>
---
 Documentation/devicetree/bindings/serial/renesas,sci.yaml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/serial/renesas,sci.yaml b/Documentation/devicetree/bindings/serial/renesas,sci.yaml
index 64d3db6e54e5..ff86c1e5864a 100644
--- a/Documentation/devicetree/bindings/serial/renesas,sci.yaml
+++ b/Documentation/devicetree/bindings/serial/renesas,sci.yaml
@@ -20,6 +20,7 @@ properties:
               - renesas,r9a07g043-sci     # RZ/G2UL and RZ/Five
               - renesas,r9a07g044-sci     # RZ/G2{L,LC}
               - renesas,r9a07g054-sci     # RZ/V2L
+              - renesas,r9a09g077-sci     # RZ/T2H
           - const: renesas,sci            # generic SCI compatible UART
 
       - items:
@@ -71,6 +72,7 @@ if:
           - renesas,r9a07g043-sci
           - renesas,r9a07g044-sci
           - renesas,r9a07g054-sci
+          - renesas,r9a09g077-sci
 then:
   properties:
     resets:
-- 
2.43.0

Re: [PATCH v2 03/13] dt-bindings: serial: Add compatible for Renesas RZ/T2H SoC in sci

[Geert Uytterhoeven]

Hi Thierry,

On Mon, 17 Feb 2025 at 11:54, Thierry Bultel
<thierry.bultel.yh@bp.renesas.com> wrote:
> Document RZ/T2H (a.k.a r9a09g077) in SCI binding.
>
> Signed-off-by: Thierry Bultel <thierry.bultel.yh@bp.renesas.com>

Thanks for your patch!

> --- a/Documentation/devicetree/bindings/serial/renesas,sci.yaml
> +++ b/Documentation/devicetree/bindings/serial/renesas,sci.yaml
> @@ -20,6 +20,7 @@ properties:
>                - renesas,r9a07g043-sci     # RZ/G2UL and RZ/Five
>                - renesas,r9a07g044-sci     # RZ/G2{L,LC}
>                - renesas,r9a07g054-sci     # RZ/V2L
> +              - renesas,r9a09g077-sci     # RZ/T2H

As the RZ/T2H SCI does not work with a generic SCI driver, it cannot
use renesas,sci as a fallback, but needs its own section.

>            - const: renesas,sci            # generic SCI compatible UART
>
>        - items:

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

Re: [PATCH v2 03/13] dt-bindings: serial: Add compatible for Renesas RZ/T2H SoC in sci

[Geert Uytterhoeven]

Hi Thierry,

On Mon, 17 Feb 2025 at 13:20, Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> On Mon, 17 Feb 2025 at 11:54, Thierry Bultel
> <thierry.bultel.yh@bp.renesas.com> wrote:
> > Document RZ/T2H (a.k.a r9a09g077) in SCI binding.
> >
> > Signed-off-by: Thierry Bultel <thierry.bultel.yh@bp.renesas.com>
>
> Thanks for your patch!
>
> > --- a/Documentation/devicetree/bindings/serial/renesas,sci.yaml
> > +++ b/Documentation/devicetree/bindings/serial/renesas,sci.yaml
> > @@ -20,6 +20,7 @@ properties:
> >                - renesas,r9a07g043-sci     # RZ/G2UL and RZ/Five
> >                - renesas,r9a07g044-sci     # RZ/G2{L,LC}
> >                - renesas,r9a07g054-sci     # RZ/V2L
> > +              - renesas,r9a09g077-sci     # RZ/T2H
>
> As the RZ/T2H SCI does not work with a generic SCI driver, it cannot
> use renesas,sci as a fallback, but needs its own section.
>
> >            - const: renesas,sci            # generic SCI compatible UART

As the RZ/T2H SCI does support RTS/CTS, the line

  uart-has-rtscts: false

needs to become conditional.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

[PATCH v2 04/13] soc: renesas: Add RZ/T2H (R9A09G077) config option

[Thierry Bultel]

Add a configuration option for the RZ/T2H SoC.

Signed-off-by: Thierry Bultel <thierry.bultel.yh@bp.renesas.com>
---
 drivers/soc/renesas/Kconfig | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/soc/renesas/Kconfig b/drivers/soc/renesas/Kconfig
index 9f7fe02310b9..058ac0b53ffe 100644
--- a/drivers/soc/renesas/Kconfig
+++ b/drivers/soc/renesas/Kconfig
@@ -351,6 +351,11 @@ config ARCH_R9A09G057
 	help
 	  This enables support for the Renesas RZ/V2H(P) SoC variants.
 
+config ARCH_R9A09G077
+	bool "ARM64 Platform support for RZ/T2H"
+	help
+	  This enables support for the Renesas RZ/T2H SoC variants.
+
 endif # ARM64
 
 if RISCV
-- 
2.43.0

[PATCH v2 05/13] clk: renesas: Pass sub struct of cpg_mssr_priv to cpg_clk_register

[Thierry Bultel]

In a coming evolution, the registration callback will need more parameters
from cpg_mssr_priv (like another base address with clock controllers
with double register block).
Instead of adding more parameters, mode the needed parameters to a public
sub-struct.
---
 drivers/clk/renesas/r7s9210-cpg-mssr.c  |  7 +-
 drivers/clk/renesas/r8a77970-cpg-mssr.c | 11 +--
 drivers/clk/renesas/rcar-gen3-cpg.c     |  8 +-
 drivers/clk/renesas/rcar-gen3-cpg.h     |  6 +-
 drivers/clk/renesas/rcar-gen4-cpg.c     |  9 ++-
 drivers/clk/renesas/rcar-gen4-cpg.h     |  3 +-
 drivers/clk/renesas/renesas-cpg-mssr.c  | 99 +++++++++++++------------
 drivers/clk/renesas/renesas-cpg-mssr.h  | 21 +++++-
 8 files changed, 93 insertions(+), 71 deletions(-)

diff --git a/drivers/clk/renesas/r7s9210-cpg-mssr.c b/drivers/clk/renesas/r7s9210-cpg-mssr.c
index a85227c248f3..733244687daa 100644
--- a/drivers/clk/renesas/r7s9210-cpg-mssr.c
+++ b/drivers/clk/renesas/r7s9210-cpg-mssr.c
@@ -159,12 +159,13 @@ static void __init r7s9210_update_clk_table(struct clk *extal_clk,
 
 static struct clk * __init rza2_cpg_clk_register(struct device *dev,
 	const struct cpg_core_clk *core, const struct cpg_mssr_info *info,
-	struct clk **clks, void __iomem *base,
-	struct raw_notifier_head *notifiers)
+	struct cpg_mssr_pub *pub)
 {
-	struct clk *parent;
+	void __iomem *base = pub->base0;
+	struct clk **clks = pub->clks;
 	unsigned int mult = 1;
 	unsigned int div = 1;
+	struct clk *parent;
 
 	parent = clks[core->parent];
 	if (IS_ERR(parent))
diff --git a/drivers/clk/renesas/r8a77970-cpg-mssr.c b/drivers/clk/renesas/r8a77970-cpg-mssr.c
index 3cec0f501b94..c50aa1a49196 100644
--- a/drivers/clk/renesas/r8a77970-cpg-mssr.c
+++ b/drivers/clk/renesas/r8a77970-cpg-mssr.c
@@ -218,11 +218,13 @@ static int __init r8a77970_cpg_mssr_init(struct device *dev)
 }
 
 static struct clk * __init r8a77970_cpg_clk_register(struct device *dev,
-	const struct cpg_core_clk *core, const struct cpg_mssr_info *info,
-	struct clk **clks, void __iomem *base,
-	struct raw_notifier_head *notifiers)
+	const struct cpg_core_clk *core,
+	const struct cpg_mssr_info *info,
+	struct cpg_mssr_pub *pub)
 {
 	const struct clk_div_table *table;
+	void __iomem *base = pub->base0;
+	struct clk **clks = pub->clks;
 	const struct clk *parent;
 	unsigned int shift;
 
@@ -236,8 +238,7 @@ static struct clk * __init r8a77970_cpg_clk_register(struct device *dev,
 		shift = 4;
 		break;
 	default:
-		return rcar_gen3_cpg_clk_register(dev, core, info, clks, base,
-						  notifiers);
+		return rcar_gen3_cpg_clk_register(dev, core, info, pub);
 	}
 
 	parent = clks[core->parent];
diff --git a/drivers/clk/renesas/rcar-gen3-cpg.c b/drivers/clk/renesas/rcar-gen3-cpg.c
index 027100e84ee4..aafeb139fdb4 100644
--- a/drivers/clk/renesas/rcar-gen3-cpg.c
+++ b/drivers/clk/renesas/rcar-gen3-cpg.c
@@ -345,9 +345,11 @@ static const struct soc_device_attribute cpg_quirks_match[] __initconst = {
 
 struct clk * __init rcar_gen3_cpg_clk_register(struct device *dev,
 	const struct cpg_core_clk *core, const struct cpg_mssr_info *info,
-	struct clk **clks, void __iomem *base,
-	struct raw_notifier_head *notifiers)
+	struct cpg_mssr_pub *pub)
 {
+	struct raw_notifier_head *notifiers = &pub->notifiers;
+	void __iomem *base = pub->base0;
+	struct clk **clks = pub->clks;
 	const struct clk *parent;
 	unsigned int mult = 1;
 	unsigned int div = 1;
@@ -431,7 +433,7 @@ struct clk * __init rcar_gen3_cpg_clk_register(struct device *dev,
 			}
 
 			writel(value, csn->reg);
-			cpg_simple_notifier_register(notifiers, csn);
+			cpg_simple_notifier_register(&pub->notifiers, csn);
 			break;
 		}
 
diff --git a/drivers/clk/renesas/rcar-gen3-cpg.h b/drivers/clk/renesas/rcar-gen3-cpg.h
index bfdc649bdf12..6ad560fca01b 100644
--- a/drivers/clk/renesas/rcar-gen3-cpg.h
+++ b/drivers/clk/renesas/rcar-gen3-cpg.h
@@ -80,9 +80,9 @@ struct rcar_gen3_cpg_pll_config {
 #define CPG_RCKCR	0x240
 
 struct clk *rcar_gen3_cpg_clk_register(struct device *dev,
-	const struct cpg_core_clk *core, const struct cpg_mssr_info *info,
-	struct clk **clks, void __iomem *base,
-	struct raw_notifier_head *notifiers);
+	const struct cpg_core_clk *core,
+	const struct cpg_mssr_info *info,
+	struct cpg_mssr_pub *pub);
 int rcar_gen3_cpg_init(const struct rcar_gen3_cpg_pll_config *config,
 		       unsigned int clk_extalr, u32 mode);
 
diff --git a/drivers/clk/renesas/rcar-gen4-cpg.c b/drivers/clk/renesas/rcar-gen4-cpg.c
index 31aa790fd003..e02e49f7fcf8 100644
--- a/drivers/clk/renesas/rcar-gen4-cpg.c
+++ b/drivers/clk/renesas/rcar-gen4-cpg.c
@@ -418,10 +418,11 @@ static const struct clk_div_table cpg_rpcsrc_div_table[] = {
 
 struct clk * __init rcar_gen4_cpg_clk_register(struct device *dev,
 	const struct cpg_core_clk *core, const struct cpg_mssr_info *info,
-	struct clk **clks, void __iomem *base,
-	struct raw_notifier_head *notifiers)
+	struct cpg_mssr_pub *pub)
 {
 	const struct clk *parent;
+	void __iomem *base = pub->base0;
+	struct clk **clks = pub->clks;
 	unsigned int mult = 1;
 	unsigned int div = 1;
 	u32 value;
@@ -479,7 +480,7 @@ struct clk * __init rcar_gen4_cpg_clk_register(struct device *dev,
 
 	case CLK_TYPE_GEN4_SDH:
 		return cpg_sdh_clk_register(core->name, base + core->offset,
-					   __clk_get_name(parent), notifiers);
+					   __clk_get_name(parent), &pub->notifiers);
 
 	case CLK_TYPE_GEN4_SD:
 		return cpg_sd_clk_register(core->name, base + core->offset,
@@ -517,7 +518,7 @@ struct clk * __init rcar_gen4_cpg_clk_register(struct device *dev,
 
 	case CLK_TYPE_GEN4_RPC:
 		return cpg_rpc_clk_register(core->name, base + CPG_RPCCKCR,
-					    __clk_get_name(parent), notifiers);
+					    __clk_get_name(parent), &pub->notifiers);
 
 	case CLK_TYPE_GEN4_RPCD2:
 		return cpg_rpcd2_clk_register(core->name, base + CPG_RPCCKCR,
diff --git a/drivers/clk/renesas/rcar-gen4-cpg.h b/drivers/clk/renesas/rcar-gen4-cpg.h
index 717fd148464f..6c8280b37c37 100644
--- a/drivers/clk/renesas/rcar-gen4-cpg.h
+++ b/drivers/clk/renesas/rcar-gen4-cpg.h
@@ -78,8 +78,7 @@ struct rcar_gen4_cpg_pll_config {
 
 struct clk *rcar_gen4_cpg_clk_register(struct device *dev,
 	const struct cpg_core_clk *core, const struct cpg_mssr_info *info,
-	struct clk **clks, void __iomem *base,
-	struct raw_notifier_head *notifiers);
+	struct cpg_mssr_pub *pub);
 int rcar_gen4_cpg_init(const struct rcar_gen4_cpg_pll_config *config,
 		       unsigned int clk_extalr, u32 mode);
 
diff --git a/drivers/clk/renesas/renesas-cpg-mssr.c b/drivers/clk/renesas/renesas-cpg-mssr.c
index 79e7a90c3b1b..7d5fba3aef19 100644
--- a/drivers/clk/renesas/renesas-cpg-mssr.c
+++ b/drivers/clk/renesas/renesas-cpg-mssr.c
@@ -127,7 +127,6 @@ static const u16 srstclr_for_gen4[] = {
  *
  * @rcdev: Optional reset controller entity
  * @dev: CPG/MSSR device
- * @base: CPG/MSSR register block base address
  * @reg_layout: CPG/MSSR register layout
  * @rmw_lock: protects RMW register accesses
  * @np: Device node in DT for this CPG/MSSR module
@@ -143,6 +142,7 @@ static const u16 srstclr_for_gen4[] = {
  *                 [].val: Saved values of SMSTPCR[]
  * @reserved_ids: Temporary used, reserved id list
  * @num_reserved_ids: Temporary used, number of reserved id list
+ * @pub: Data passed to clock registration callback
  * @clks: Array containing all Core and Module Clocks
  */
 struct cpg_mssr_priv {
@@ -150,16 +150,13 @@ struct cpg_mssr_priv {
 	struct reset_controller_dev rcdev;
 #endif
 	struct device *dev;
-	void __iomem *base;
 	enum clk_reg_layout reg_layout;
-	spinlock_t rmw_lock;
 	struct device_node *np;
 
 	unsigned int num_core_clks;
 	unsigned int num_mod_clks;
 	unsigned int last_dt_core_clk;
 
-	struct raw_notifier_head notifiers;
 	const u16 *status_regs;
 	const u16 *control_regs;
 	const u16 *reset_regs;
@@ -172,6 +169,7 @@ struct cpg_mssr_priv {
 	unsigned int *reserved_ids;
 	unsigned int num_reserved_ids;
 
+	struct cpg_mssr_pub pub;
 	struct clk *clks[];
 };
 
@@ -205,38 +203,40 @@ static int cpg_mstp_clock_endisable(struct clk_hw *hw, bool enable)
 
 	dev_dbg(dev, "MSTP %u%02u/%pC %s\n", reg, bit, hw->clk,
 		enable ? "ON" : "OFF");
-	spin_lock_irqsave(&priv->rmw_lock, flags);
+	spin_lock_irqsave(&priv->pub.rmw_lock, flags);
 
 	if (priv->reg_layout == CLK_REG_LAYOUT_RZ_A) {
-		value = readb(priv->base + priv->control_regs[reg]);
+		value = readb(priv->pub.base0 + priv->control_regs[reg]);
 		if (enable)
 			value &= ~bitmask;
 		else
 			value |= bitmask;
-		writeb(value, priv->base + priv->control_regs[reg]);
+		writeb(value, priv->pub.base0 + priv->control_regs[reg]);
 
 		/* dummy read to ensure write has completed */
-		readb(priv->base + priv->control_regs[reg]);
-		barrier_data(priv->base + priv->control_regs[reg]);
+		readb(priv->pub.base0 + priv->control_regs[reg]);
+		barrier_data(priv->pub.base0 + priv->control_regs[reg]);
+
 	} else {
-		value = readl(priv->base + priv->control_regs[reg]);
+		value = readl(priv->pub.base0 + priv->control_regs[reg]);
 		if (enable)
 			value &= ~bitmask;
 		else
 			value |= bitmask;
-		writel(value, priv->base + priv->control_regs[reg]);
+		writel(value, priv->pub.base0 + priv->control_regs[reg]);
 	}
 
-	spin_unlock_irqrestore(&priv->rmw_lock, flags);
+	spin_unlock_irqrestore(&priv->pub.rmw_lock, flags);
 
-	if (!enable || priv->reg_layout == CLK_REG_LAYOUT_RZ_A)
+	if (!enable || priv->reg_layout == CLK_REG_LAYOUT_RZ_A ||
+		priv->reg_layout == CLK_REG_LAYOUT_RZ_T2H)
 		return 0;
 
-	error = readl_poll_timeout_atomic(priv->base + priv->status_regs[reg],
+	error = readl_poll_timeout_atomic(priv->pub.base0 + priv->status_regs[reg],
 					  value, !(value & bitmask), 0, 10);
 	if (error)
 		dev_err(dev, "Failed to enable SMSTP %p[%d]\n",
-			priv->base + priv->control_regs[reg], bit);
+			priv->pub.base0 + priv->control_regs[reg], bit);
 
 	return error;
 }
@@ -255,12 +255,13 @@ static int cpg_mstp_clock_is_enabled(struct clk_hw *hw)
 {
 	struct mstp_clock *clock = to_mstp_clock(hw);
 	struct cpg_mssr_priv *priv = clock->priv;
+	unsigned int reg = clock->index / 32;
 	u32 value;
 
 	if (priv->reg_layout == CLK_REG_LAYOUT_RZ_A)
-		value = readb(priv->base + priv->control_regs[clock->index / 32]);
+		value = readb(priv->pub.base0 + priv->control_regs[reg]);
 	else
-		value = readl(priv->base + priv->status_regs[clock->index / 32]);
+		value = readl(priv->pub.base0 + priv->status_regs[reg]);
 
 	return !(value & BIT(clock->index % 32));
 }
@@ -352,7 +353,7 @@ static void __init cpg_mssr_register_core_clk(const struct cpg_core_clk *core,
 	case CLK_TYPE_DIV6P1:
 	case CLK_TYPE_DIV6_RO:
 		WARN_DEBUG(core->parent >= priv->num_core_clks);
-		parent = priv->clks[core->parent];
+		parent = priv->pub.clks[core->parent];
 		if (IS_ERR(parent)) {
 			clk = parent;
 			goto fail;
@@ -362,12 +363,12 @@ static void __init cpg_mssr_register_core_clk(const struct cpg_core_clk *core,
 
 		if (core->type == CLK_TYPE_DIV6_RO)
 			/* Multiply with the DIV6 register value */
-			div *= (readl(priv->base + core->offset) & 0x3f) + 1;
+			div *= (readl(priv->pub.base0 + core->offset) & 0x3f) + 1;
 
 		if (core->type == CLK_TYPE_DIV6P1) {
 			clk = cpg_div6_register(core->name, 1, &parent_name,
-						priv->base + core->offset,
-						&priv->notifiers);
+						priv->pub.base0 + core->offset,
+						&priv->pub.notifiers);
 		} else {
 			clk = clk_register_fixed_factor(NULL, core->name,
 							parent_name, 0,
@@ -383,8 +384,7 @@ static void __init cpg_mssr_register_core_clk(const struct cpg_core_clk *core,
 	default:
 		if (info->cpg_clk_register)
 			clk = info->cpg_clk_register(dev, core, info,
-						     priv->clks, priv->base,
-						     &priv->notifiers);
+						     &priv->pub);
 		else
 			dev_err(dev, "%s has unsupported core clock type %u\n",
 				core->name, core->type);
@@ -395,7 +395,7 @@ static void __init cpg_mssr_register_core_clk(const struct cpg_core_clk *core,
 		goto fail;
 
 	dev_dbg(dev, "Core clock %pC at %lu Hz\n", clk, clk_get_rate(clk));
-	priv->clks[id] = clk;
+	priv->pub.clks[id] = clk;
 	return;
 
 fail:
@@ -418,14 +418,14 @@ static void __init cpg_mssr_register_mod_clk(const struct mssr_mod_clk *mod,
 	WARN_DEBUG(id < priv->num_core_clks);
 	WARN_DEBUG(id >= priv->num_core_clks + priv->num_mod_clks);
 	WARN_DEBUG(mod->parent >= priv->num_core_clks + priv->num_mod_clks);
-	WARN_DEBUG(PTR_ERR(priv->clks[id]) != -ENOENT);
+	WARN_DEBUG(PTR_ERR(priv->pub.clks[id]) != -ENOENT);
 
 	if (!mod->name) {
 		/* Skip NULLified clock */
 		return;
 	}
 
-	parent = priv->clks[mod->parent];
+	parent = priv->pub.clks[mod->parent];
 	if (IS_ERR(parent)) {
 		clk = parent;
 		goto fail;
@@ -627,13 +627,13 @@ static int cpg_mssr_reset(struct reset_controller_dev *rcdev,
 	dev_dbg(priv->dev, "reset %u%02u\n", reg, bit);
 
 	/* Reset module */
-	writel(bitmask, priv->base + priv->reset_regs[reg]);
+	writel(bitmask, priv->pub.base0 + priv->reset_regs[reg]);
 
 	/* Wait for at least one cycle of the RCLK clock (@ ca. 32 kHz) */
 	udelay(35);
 
 	/* Release module from reset state */
-	writel(bitmask, priv->base + priv->reset_clear_regs[reg]);
+	writel(bitmask, priv->pub.base0 + priv->reset_clear_regs[reg]);
 
 	return 0;
 }
@@ -647,7 +647,7 @@ static int cpg_mssr_assert(struct reset_controller_dev *rcdev, unsigned long id)
 
 	dev_dbg(priv->dev, "assert %u%02u\n", reg, bit);
 
-	writel(bitmask, priv->base + priv->reset_regs[reg]);
+	writel(bitmask, priv->pub.base0 + priv->reset_regs[reg]);
 	return 0;
 }
 
@@ -661,7 +661,7 @@ static int cpg_mssr_deassert(struct reset_controller_dev *rcdev,
 
 	dev_dbg(priv->dev, "deassert %u%02u\n", reg, bit);
 
-	writel(bitmask, priv->base + priv->reset_clear_regs[reg]);
+	writel(bitmask, priv->pub.base0 + priv->reset_clear_regs[reg]);
 	return 0;
 }
 
@@ -673,7 +673,7 @@ static int cpg_mssr_status(struct reset_controller_dev *rcdev,
 	unsigned int bit = id % 32;
 	u32 bitmask = BIT(bit);
 
-	return !!(readl(priv->base + priv->reset_regs[reg]) & bitmask);
+	return !!(readl(priv->pub.base0 + priv->reset_regs[reg]) & bitmask);
 }
 
 static const struct reset_control_ops cpg_mssr_reset_ops = {
@@ -899,12 +899,12 @@ static int cpg_mssr_suspend_noirq(struct device *dev)
 		if (priv->smstpcr_saved[reg].mask)
 			priv->smstpcr_saved[reg].val =
 				priv->reg_layout == CLK_REG_LAYOUT_RZ_A ?
-				readb(priv->base + priv->control_regs[reg]) :
-				readl(priv->base + priv->control_regs[reg]);
+				readb(priv->pub.base0 + priv->control_regs[reg]) :
+				readl(priv->pub.base0 + priv->control_regs[reg]);
 	}
 
 	/* Save core clocks */
-	raw_notifier_call_chain(&priv->notifiers, PM_EVENT_SUSPEND, NULL);
+	raw_notifier_call_chain(&priv->pub.notifiers, PM_EVENT_SUSPEND, NULL);
 
 	return 0;
 }
@@ -921,7 +921,7 @@ static int cpg_mssr_resume_noirq(struct device *dev)
 		return 0;
 
 	/* Restore core clocks */
-	raw_notifier_call_chain(&priv->notifiers, PM_EVENT_RESUME, NULL);
+	raw_notifier_call_chain(&priv->pub.notifiers, PM_EVENT_RESUME, NULL);
 
 	/* Restore module clocks */
 	for (reg = 0; reg < ARRAY_SIZE(priv->smstpcr_saved); reg++) {
@@ -930,29 +930,29 @@ static int cpg_mssr_resume_noirq(struct device *dev)
 			continue;
 
 		if (priv->reg_layout == CLK_REG_LAYOUT_RZ_A)
-			oldval = readb(priv->base + priv->control_regs[reg]);
+			oldval = readb(priv->pub.base0 + priv->control_regs[reg]);
 		else
-			oldval = readl(priv->base + priv->control_regs[reg]);
+			oldval = readl(priv->pub.base0 + priv->control_regs[reg]);
 		newval = oldval & ~mask;
 		newval |= priv->smstpcr_saved[reg].val & mask;
 		if (newval == oldval)
 			continue;
 
 		if (priv->reg_layout == CLK_REG_LAYOUT_RZ_A) {
-			writeb(newval, priv->base + priv->control_regs[reg]);
+			writeb(newval, priv->pub.base0 + priv->control_regs[reg]);
 			/* dummy read to ensure write has completed */
-			readb(priv->base + priv->control_regs[reg]);
-			barrier_data(priv->base + priv->control_regs[reg]);
+			readb(priv->pub.base0 + priv->control_regs[reg]);
+			barrier_data(priv->pub.base0 + priv->control_regs[reg]);
 			continue;
 		} else
-			writel(newval, priv->base + priv->control_regs[reg]);
+			writel(newval, priv->pub.base0 + priv->control_regs[reg]);
 
 		/* Wait until enabled clocks are really enabled */
 		mask &= ~priv->smstpcr_saved[reg].val;
 		if (!mask)
 			continue;
 
-		error = readl_poll_timeout_atomic(priv->base + priv->status_regs[reg],
+		error = readl_poll_timeout_atomic(priv->pub.base0 + priv->status_regs[reg],
 						oldval, !(oldval & mask), 0, 10);
 		if (error)
 			dev_warn(dev, "Failed to enable SMSTP%u[0x%x]\n", reg,
@@ -1062,12 +1062,13 @@ static int __init cpg_mssr_common_init(struct device *dev,
 	if (!priv)
 		return -ENOMEM;
 
+	priv->pub.clks = priv->clks;
 	priv->np = np;
 	priv->dev = dev;
-	spin_lock_init(&priv->rmw_lock);
+	spin_lock_init(&priv->pub.rmw_lock);
 
-	priv->base = of_iomap(np, 0);
-	if (!priv->base) {
+	priv->pub.base0 = of_iomap(np, 0);
+	if (!priv->pub.base0) {
 		error = -ENOMEM;
 		goto out_err;
 	}
@@ -1075,7 +1076,7 @@ static int __init cpg_mssr_common_init(struct device *dev,
 	priv->num_core_clks = info->num_total_core_clks;
 	priv->num_mod_clks = info->num_hw_mod_clks;
 	priv->last_dt_core_clk = info->last_dt_core_clk;
-	RAW_INIT_NOTIFIER_HEAD(&priv->notifiers);
+	RAW_INIT_NOTIFIER_HEAD(&priv->pub.notifiers);
 	priv->reg_layout = info->reg_layout;
 	if (priv->reg_layout == CLK_REG_LAYOUT_RCAR_GEN2_AND_GEN3) {
 		priv->status_regs = mstpsr;
@@ -1095,7 +1096,7 @@ static int __init cpg_mssr_common_init(struct device *dev,
 	}
 
 	for (i = 0; i < nclks; i++)
-		priv->clks[i] = ERR_PTR(-ENOENT);
+		priv->pub.clks[i] = ERR_PTR(-ENOENT);
 
 	error = cpg_mssr_reserved_init(priv, info);
 	if (error)
@@ -1112,8 +1113,8 @@ static int __init cpg_mssr_common_init(struct device *dev,
 reserve_err:
 	cpg_mssr_reserved_exit(priv);
 out_err:
-	if (priv->base)
-		iounmap(priv->base);
+	if (priv->pub.base0)
+		iounmap(priv->pub.base0);
 	kfree(priv);
 
 	return error;
diff --git a/drivers/clk/renesas/renesas-cpg-mssr.h b/drivers/clk/renesas/renesas-cpg-mssr.h
index a1d6e0cbcff9..adc8948e6af4 100644
--- a/drivers/clk/renesas/renesas-cpg-mssr.h
+++ b/drivers/clk/renesas/renesas-cpg-mssr.h
@@ -8,6 +8,8 @@
 #ifndef __CLK_RENESAS_CPG_MSSR_H__
 #define __CLK_RENESAS_CPG_MSSR_H__
 
+#include <linux/notifier.h>
+
     /*
      * Definitions of CPG Core Clocks
      *
@@ -27,6 +29,21 @@ struct cpg_core_clk {
 	unsigned int div;
 	unsigned int mult;
 	unsigned int offset;
+
+/**
+ * struct cpg_mssr_pub - Private data shared with
+ * device-specific clk registration code
+ *
+ * @base0: CPG/MSSR register block base0 address
+ * @rmw_lock: protects RMW register accesses
+ * @notifiers: Notifier chain to save/restore clock state for system resume
+ * @clks: pointer to clocks
+ */
+struct cpg_mssr_pub {
+	void __iomem *base0;
+	struct raw_notifier_head notifiers;
+	spinlock_t rmw_lock;
+	struct clk **clks;
 };
 
 enum clk_types {
@@ -153,8 +170,8 @@ struct cpg_mssr_info {
 	struct clk *(*cpg_clk_register)(struct device *dev,
 					const struct cpg_core_clk *core,
 					const struct cpg_mssr_info *info,
-					struct clk **clks, void __iomem *base,
-					struct raw_notifier_head *notifiers);
+					struct cpg_mssr_pub *pub);
+
 };
 
 extern const struct cpg_mssr_info r7s9210_cpg_mssr_info;
-- 
2.43.0

Re: [PATCH v2 05/13] clk: renesas: Pass sub struct of cpg_mssr_priv to cpg_clk_register

[Paul Barker]

[-- Attachment #1.1.1: Type: text/plain, Size: 3364 bytes --]

Hi Thierry,

On 17/02/2025 10:52, Thierry Bultel wrote:
> In a coming evolution, the registration callback will need more parameters
> from cpg_mssr_priv (like another base address with clock controllers
> with double register block).
> Instead of adding more parameters, mode the needed parameters to a public
> sub-struct.

This is missing the Signed-off-by line.

I also think you should mention that rmw_lock is moved to the new struct
as it will be needed in the subsequent patch, since none of the
functions modified by this patch to take a `struct cpg_mssr_pub`
argument use that lock.

[snip]

> diff --git a/drivers/clk/renesas/rcar-gen3-cpg.c b/drivers/clk/renesas/rcar-gen3-cpg.c
> index 027100e84ee4..aafeb139fdb4 100644
> --- a/drivers/clk/renesas/rcar-gen3-cpg.c
> +++ b/drivers/clk/renesas/rcar-gen3-cpg.c
> @@ -345,9 +345,11 @@ static const struct soc_device_attribute cpg_quirks_match[] __initconst = {
>  
>  struct clk * __init rcar_gen3_cpg_clk_register(struct device *dev,
>  	const struct cpg_core_clk *core, const struct cpg_mssr_info *info,
> -	struct clk **clks, void __iomem *base,
> -	struct raw_notifier_head *notifiers)
> +	struct cpg_mssr_pub *pub)
>  {
> +	struct raw_notifier_head *notifiers = &pub->notifiers;
> +	void __iomem *base = pub->base0;
> +	struct clk **clks = pub->clks;
>  	const struct clk *parent;
>  	unsigned int mult = 1;
>  	unsigned int div = 1;
> @@ -431,7 +433,7 @@ struct clk * __init rcar_gen3_cpg_clk_register(struct device *dev,
>  			}
>  
>  			writel(value, csn->reg);
> -			cpg_simple_notifier_register(notifiers, csn);
> +			cpg_simple_notifier_register(&pub->notifiers, csn);

This change isn't needed as you've added a notifiers variable at the
start of the function.

>  			break;
>  		}
>  

[snip]

> diff --git a/drivers/clk/renesas/renesas-cpg-mssr.c b/drivers/clk/renesas/renesas-cpg-mssr.c
> index 79e7a90c3b1b..7d5fba3aef19 100644
> --- a/drivers/clk/renesas/renesas-cpg-mssr.c
> +++ b/drivers/clk/renesas/renesas-cpg-mssr.c
> @@ -127,7 +127,6 @@ static const u16 srstclr_for_gen4[] = {
>   *
>   * @rcdev: Optional reset controller entity
>   * @dev: CPG/MSSR device
> - * @base: CPG/MSSR register block base address
>   * @reg_layout: CPG/MSSR register layout
>   * @rmw_lock: protects RMW register accesses
>   * @np: Device node in DT for this CPG/MSSR module
> @@ -143,6 +142,7 @@ static const u16 srstclr_for_gen4[] = {
>   *                 [].val: Saved values of SMSTPCR[]
>   * @reserved_ids: Temporary used, reserved id list
>   * @num_reserved_ids: Temporary used, number of reserved id list
> + * @pub: Data passed to clock registration callback
>   * @clks: Array containing all Core and Module Clocks
>   */
>  struct cpg_mssr_priv {
> @@ -150,16 +150,13 @@ struct cpg_mssr_priv {
>  	struct reset_controller_dev rcdev;
>  #endif
>  	struct device *dev;
> -	void __iomem *base;
>  	enum clk_reg_layout reg_layout;
> -	spinlock_t rmw_lock;

You can remove the documentation line for @base in the comment above.

>  	struct device_node *np;
>  
>  	unsigned int num_core_clks;
>  	unsigned int num_mod_clks;
>  	unsigned int last_dt_core_clk;
>  
> -	struct raw_notifier_head notifiers;

As above, you can remove the @notifiers entry from the comment above.

Thanks,

-- 
Paul Barker

[-- Attachment #1.1.2: OpenPGP public key --]
[-- Type: application/pgp-keys, Size: 3577 bytes --]

[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 236 bytes --]

Re: [PATCH v2 05/13] clk: renesas: Pass sub struct of cpg_mssr_priv to cpg_clk_register

[Geert Uytterhoeven]

Hi Thierry,

On Mon, 17 Feb 2025 at 11:54, Thierry Bultel
<thierry.bultel.yh@bp.renesas.com> wrote:
> In a coming evolution, the registration callback will need more parameters
> from cpg_mssr_priv (like another base address with clock controllers
> with double register block).
> Instead of adding more parameters, mode the needed parameters to a public
> sub-struct.

No SoB?

>  drivers/clk/renesas/r7s9210-cpg-mssr.c  |  7 +-
>  drivers/clk/renesas/r8a77970-cpg-mssr.c | 11 +--
>  drivers/clk/renesas/rcar-gen3-cpg.c     |  8 +-
>  drivers/clk/renesas/rcar-gen3-cpg.h     |  6 +-
>  drivers/clk/renesas/rcar-gen4-cpg.c     |  9 ++-
>  drivers/clk/renesas/rcar-gen4-cpg.h     |  3 +-
>  drivers/clk/renesas/renesas-cpg-mssr.c  | 99 +++++++++++++------------
>  drivers/clk/renesas/renesas-cpg-mssr.h  | 21 +++++-
>  8 files changed, 93 insertions(+), 71 deletions(-)

As you forgot to update drivers/clk/renesas/rcar-gen2-cpg.[ch], this
breaks the build for R-Car Gen2 and RZ/G1 (e.g. shmobile_defconfig),

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

[PATCH v2 06/13] clk: renesas: Add support for R9A09G077 SoC

[Thierry Bultel]

RZ/T2H has 2 registers blocks at different addresses.

The clock tree has configurable dividers and mux selectors.
Add these new clock types, new register layout type, and
registration code for mux and div in registration callback.

Signed-off-by: Thierry Bultel <thierry.bultel.yh@bp.renesas.com>
---
 drivers/clk/renesas/Kconfig              |   5 +
 drivers/clk/renesas/Makefile             |   1 +
 drivers/clk/renesas/r9a09g077-cpg-mssr.c | 237 +++++++++++++++++++++++
 drivers/clk/renesas/renesas-cpg-mssr.c   |  40 ++++
 drivers/clk/renesas/renesas-cpg-mssr.h   |  23 +++
 5 files changed, 306 insertions(+)
 create mode 100644 drivers/clk/renesas/r9a09g077-cpg-mssr.c

diff --git a/drivers/clk/renesas/Kconfig b/drivers/clk/renesas/Kconfig
index ff01f5f0ed20..58ea50b0e5b8 100644
--- a/drivers/clk/renesas/Kconfig
+++ b/drivers/clk/renesas/Kconfig
@@ -41,6 +41,7 @@ config CLK_RENESAS
 	select CLK_R9A08G045 if ARCH_R9A08G045
 	select CLK_R9A09G011 if ARCH_R9A09G011
 	select CLK_R9A09G057 if ARCH_R9A09G057
+	select CLK_R9A09G077 if ARCH_R9A09G077
 	select CLK_SH73A0 if ARCH_SH73A0
 
 if CLK_RENESAS
@@ -198,6 +199,10 @@ config CLK_R9A09G057
        bool "RZ/V2H(P) clock support" if COMPILE_TEST
        select CLK_RZV2H
 
+config CLK_R9A09G077
+	bool "RZ/T2H clock support" if COMPILE_TEST
+	select CLK_RZT2H
+
 config CLK_SH73A0
 	bool "SH-Mobile AG5 clock support" if COMPILE_TEST
 	select CLK_RENESAS_CPG_MSTP
diff --git a/drivers/clk/renesas/Makefile b/drivers/clk/renesas/Makefile
index 82efaa835ac7..61c95d0e3f7a 100644
--- a/drivers/clk/renesas/Makefile
+++ b/drivers/clk/renesas/Makefile
@@ -31,6 +31,7 @@ obj-$(CONFIG_CLK_R8A779A0)		+= r8a779a0-cpg-mssr.o
 obj-$(CONFIG_CLK_R8A779F0)		+= r8a779f0-cpg-mssr.o
 obj-$(CONFIG_CLK_R8A779G0)		+= r8a779g0-cpg-mssr.o
 obj-$(CONFIG_CLK_R8A779H0)		+= r8a779h0-cpg-mssr.o
+obj-$(CONFIG_CLK_R9A09G077)		+= r9a09g077-cpg-mssr.o
 obj-$(CONFIG_CLK_R9A06G032)		+= r9a06g032-clocks.o
 obj-$(CONFIG_CLK_R9A07G043)		+= r9a07g043-cpg.o
 obj-$(CONFIG_CLK_R9A07G044)		+= r9a07g044-cpg.o
diff --git a/drivers/clk/renesas/r9a09g077-cpg-mssr.c b/drivers/clk/renesas/r9a09g077-cpg-mssr.c
new file mode 100644
index 000000000000..62a5fb115393
--- /dev/null
+++ b/drivers/clk/renesas/r9a09g077-cpg-mssr.c
@@ -0,0 +1,237 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * r9a09g077 Clock Pulse Generator / Module Standby and Software Reset
+ *
+ * Copyright (C) 2025 Renesas Electronics Corp.
+ *
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+
+#include <dt-bindings/clock/r9a09g077-cpg-mssr.h>
+#include "renesas-cpg-mssr.h"
+
+#define SCKCR		0x00
+#define SCKCR2		0x04
+#define SCKCR3		0x08
+#define SCKCR4		0x0C
+#define PMSEL		0x10
+#define PMSEL_PLL0	BIT(0)
+#define PMSEL_PLL2	BIT(2)
+#define PMSEL_PLL3	BIT(3)
+#define PLL0EN		BIT(0)
+#define PLL2EN		BIT(0)
+#define PLL3EN		BIT(0)
+#define PLL0MON		0x20
+#define PLL0EN_REG	0x30
+#define PLL0_SSC_CTR	0x34
+#define PLL1MON		0x40
+#define LOCOCR		0x70
+#define HIZCTRLEN	0x80
+#define PLL2MON		0x90
+#define PLL2EN_REG	0xA0
+#define PLL2_SSC_CTR	0xAC
+#define PLL3MON		0xB0
+#define PLL3EN_REG	0xC0
+#define PLL3_VCO_CTR0	0xC4
+#define PLL3_VCO_CTR1	0xC8
+#define PLL4MON		0xD0
+#define PHYSEL		BIT(21)
+
+#define MRCTLA		0x240
+#define MRCTLE		0x250
+#define MRCTLI		0x260
+#define MRCTLM		0x270
+
+#define DDIV_PACK(offset, bitpos, size) \
+		(((offset) << 20) | ((bitpos) << 12) | ((size) << 8))
+
+#define DIVCA55		DDIV_PACK(SCKCR2, 8, 4)
+#define DIVCA55S	DDIV_PACK(SCKCR2, 12, 1)
+#define DIVCR520	DDIV_PACK(SCKCR2, 2, 2)
+#define DIVCR521	DDIV_PACK(SCKCR2, 0, 2)
+#define DIVLCDC		DDIV_PACK(SCKCR3, 20, 3)
+#define DIVCKIO		DDIV_PACK(SCKCR, 16, 3)
+#define DIVETHPHY	DDIV_PACK(SCKCR, 21, 1)
+#define DIVCANFD	DDIV_PACK(SCKCR, 20, 1)
+#define DIVSPI0		DDIV_PACK(SCKCR3, 0, 2)
+#define DIVSPI1		DDIV_PACK(SCKCR3, 2, 2)
+#define DIVSPI2		DDIV_PACK(SCKCR3, 4, 2)
+#define DIVSPI3		DDIV_PACK(SCKCR2, 16, 2)
+
+#define SEL_PLL_PACK(offset, bitpos, size) \
+	(((offset) << 20) | ((bitpos) << 12) | ((size) << 8))
+
+#define	SEL_PLL		SEL_PLL_PACK(SCKCR, 22, 1)
+
+#define GET_SHIFT(val)		FIELD_GET(GENMASK(19, 12), val)
+#define GET_WIDTH(val)		FIELD_GET(GENMASK(11, 8), val)
+#define GET_REG_OFFSET(val)	FIELD_GET(GENMASK(31, 20), val)
+
+enum clk_ids {
+	/* Core Clock Outputs exported to DT */
+	LAST_DT_CORE_CLK = R9A09G077_LCDC_CLKD,
+
+	/* External Input Clocks */
+	CLK_EXTAL,
+	CLK_LOCO,
+
+	/* Internal Core Clocks */
+	CLK_PLL0,
+	CLK_PLL1,
+	CLK_PLL2,
+	CLK_PLL3,
+	CLK_PLL4,
+	CLK_SEL_PLL0,
+	CLK_SEL_CLK_PLL0,
+	CLK_SEL_PLL1,
+	CLK_SEL_CLK_PLL1,
+	CLK_SEL_PLL2,
+	CLK_SEL_CLK_PLL2,
+	CLK_SEL_PLL4,
+	CLK_SEL_CLK_PLL4,
+	CLK_SEL_CLK_SRC,
+	CLK_SEL_EXTAL,
+	CLK_SEL_LOCO,
+	CLK_PLL3_INPUT,
+
+	/* Module Clocks */
+	MOD_CLK_BASE,
+};
+
+static const struct clk_div_table dtable_1_2[] = {
+	{0, 2},
+	{15, 1},
+	{0, 0},
+};
+
+/* Mux clock tables */
+static const char * const sel_clk_pll0[] = { ".sel_loco", ".sel_pll0" };
+static const char * const sel_clk_pll1[] = { ".sel_loco", ".sel_pll1" };
+static const char * const sel_clk_pll4[] = { ".sel_loco", ".sel_pll4" };
+
+static const struct cpg_core_clk r9a09g077_core_clks[] __initconst = {
+	/* External Clock Inputs */
+	DEF_INPUT("extal", CLK_EXTAL),
+	DEF_INPUT("loco", CLK_LOCO),
+
+	/* Internal Core Clocks */
+	DEF_FIXED(".pll0", CLK_PLL0, CLK_EXTAL, 48, 1),
+	DEF_FIXED(".pll1", CLK_PLL1, CLK_EXTAL, 40, 1),
+	DEF_FIXED(".pll4", CLK_PLL4, CLK_EXTAL, 96, 1),
+	DEF_FIXED(".sel_pll0", CLK_SEL_PLL0, CLK_PLL0, 1, 1),
+	DEF_MUX(".sel_clk_pll0", CLK_SEL_CLK_PLL0, SEL_PLL,
+		sel_clk_pll0, ARRAY_SIZE(sel_clk_pll0), 0, CLK_MUX_READ_ONLY),
+	DEF_FIXED(".sel_pll1", CLK_SEL_PLL1, CLK_PLL1, 1, 1),
+	DEF_MUX(".sel_clk_pll1", CLK_SEL_CLK_PLL1, SEL_PLL,
+		sel_clk_pll1, ARRAY_SIZE(sel_clk_pll1), 0, CLK_MUX_READ_ONLY),
+	DEF_FIXED(".sel_pll4", CLK_SEL_PLL4, CLK_PLL4, 1, 1),
+	DEF_MUX(".sel_clk_pll4", CLK_SEL_CLK_PLL4, SEL_PLL,
+		sel_clk_pll4, ARRAY_SIZE(sel_clk_pll4), 0, CLK_MUX_READ_ONLY),
+
+	/* Core output clk */
+	DEF_DIV("CA55", R9A09G077_CA55, CLK_SEL_CLK_PLL0, DIVCA55,
+		dtable_1_2, CLK_DIVIDER_HIWORD_MASK, 1),
+	DEF_FIXED("PCLKM", R9A09G077_PCLKM, CLK_SEL_CLK_PLL1, 1, 8),
+	DEF_FIXED("PCLKGPTL", R9A09G077_PCLKGPTL, CLK_SEL_CLK_PLL1, 1, 2),
+};
+
+static const struct mssr_mod_clk r9a09g077_mod_clks[] __initconst = {
+	DEF_MOD("sci0", 108, R9A09G077_PCLKM),
+};
+
+static struct clk * __init
+r9a09g077_cpg_div_clk_register(struct device *dev,
+			       const struct cpg_core_clk *core,
+			       void __iomem *base,
+			       struct cpg_mssr_pub *pub)
+{
+	const struct clk *parent;
+	const char *parent_name;
+	struct clk_hw *clk_hw;
+
+	parent = pub->clks[core->parent];
+
+	if (IS_ERR(parent))
+		return ERR_CAST(parent);
+
+	parent_name = __clk_get_name(parent);
+
+	if (core->dtable)
+		clk_hw = clk_hw_register_divider_table(dev, core->name,
+						       parent_name, 0,
+						       base + GET_REG_OFFSET(core->conf),
+						       GET_SHIFT(core->conf),
+						       GET_WIDTH(core->conf),
+						       core->flag,
+						       core->dtable,
+						       &pub->rmw_lock);
+	else
+		clk_hw = clk_hw_register_divider(dev, core->name,
+						 parent_name, 0,
+						 base + GET_REG_OFFSET(core->conf),
+						 GET_SHIFT(core->conf),
+						 GET_WIDTH(core->conf),
+						 core->flag, &pub->rmw_lock);
+
+	if (IS_ERR(clk_hw))
+		return ERR_CAST(clk_hw);
+
+	return clk_hw->clk;
+
+}
+
+static struct clk * __init
+r9a09g077_cpg_mux_clk_register(struct device *dev,
+			       const struct cpg_core_clk *core,
+			       void __iomem *base,
+			       struct cpg_mssr_pub *pub)
+{
+	struct clk_hw *clk_hw;
+
+	clk_hw = devm_clk_hw_register_mux(dev, core->name,
+					  core->parent_names, core->num_parents,
+					  core->flag,
+					  base + GET_REG_OFFSET(core->conf),
+					  GET_SHIFT(core->conf),
+					  GET_WIDTH(core->conf),
+					  core->mux_flags, &pub->rmw_lock);
+	return clk_hw->clk;
+}
+
+static struct clk * __init
+	r9a09g077_cpg_clk_register(struct device *dev,
+				   const struct cpg_core_clk *core,
+				   const struct cpg_mssr_info *info,
+				   struct cpg_mssr_pub *pub)
+{
+	void __iomem *base = core->sel_base ? pub->base1 : pub->base0;
+
+	switch (core->type) {
+	case CLK_TYPE_DIV:
+		return r9a09g077_cpg_div_clk_register(dev, core, base, pub);
+	case CLK_TYPE_MUX:
+		return r9a09g077_cpg_mux_clk_register(dev, core, base, pub);
+	default:
+		return ERR_PTR(-EINVAL);
+	}
+}
+
+const struct cpg_mssr_info r9a09g077_cpg_mssr_info = {
+	/* Core Clocks */
+	.core_clks = r9a09g077_core_clks,
+	.num_core_clks = ARRAY_SIZE(r9a09g077_core_clks),
+	.last_dt_core_clk = LAST_DT_CORE_CLK,
+	.num_total_core_clks = MOD_CLK_BASE,
+
+	/* Module Clocks */
+	.mod_clks = r9a09g077_mod_clks,
+	.num_mod_clks = ARRAY_SIZE(r9a09g077_mod_clks),
+	.num_hw_mod_clks = 12 * 32,
+
+	.reg_layout = CLK_REG_LAYOUT_RZ_T2H,
+	.cpg_clk_register = r9a09g077_cpg_clk_register,
+};
diff --git a/drivers/clk/renesas/renesas-cpg-mssr.c b/drivers/clk/renesas/renesas-cpg-mssr.c
index 7d5fba3aef19..2f5aa796b0c6 100644
--- a/drivers/clk/renesas/renesas-cpg-mssr.c
+++ b/drivers/clk/renesas/renesas-cpg-mssr.c
@@ -79,6 +79,15 @@ static const u16 mstpcr_for_gen4[] = {
 	0x2D60, 0x2D64, 0x2D68, 0x2D6C, 0x2D70, 0x2D74,
 };
 
+/* Module Stop Control Register (RZ/T2H)
+ * RZ/T2H has 2 registers blocks. To differentiate them,
+ * 0x1000 is added to offsets of block 2
+ */
+static const u16 mstpcr_for_rzt2h[] = {
+	0x0300, 0x0304, 0x0308, 0x030C, 0x0310, 0x1318, 0x1320, 0x0324,
+	0x0328, 0x032C, 0x0303, 0x1334,
+};
+
 /*
  * Standby Control Register offsets (RZ/A)
  * Base address is FRQCR register
@@ -189,6 +198,14 @@ struct mstp_clock {
 
 #define to_mstp_clock(_hw) container_of(_hw, struct mstp_clock, hw)
 
+static void *cpg_rzt2h_addr_from_offset(struct clk_hw *hw, u16 offset)
+{
+	struct mstp_clock *clock = to_mstp_clock(hw);
+	struct cpg_mssr_priv *priv = clock->priv;
+
+	return offset + (offset > 0x1000 ? priv->pub.base1 - 0x1000 : priv->pub.base0);
+}
+
 static int cpg_mstp_clock_endisable(struct clk_hw *hw, bool enable)
 {
 	struct mstp_clock *clock = to_mstp_clock(hw);
@@ -260,6 +277,12 @@ static int cpg_mstp_clock_is_enabled(struct clk_hw *hw)
 
 	if (priv->reg_layout == CLK_REG_LAYOUT_RZ_A)
 		value = readb(priv->pub.base0 + priv->control_regs[reg]);
+	else if (priv->reg_layout == CLK_REG_LAYOUT_RZ_T2H) {
+		void __iomem *addr =
+			cpg_rzt2h_addr_from_offset(hw,
+						   priv->control_regs[reg]);
+		value = readw(addr);
+	}
 	else
 		value = readl(priv->pub.base0 + priv->status_regs[reg]);
 
@@ -875,6 +898,12 @@ static const struct of_device_id cpg_mssr_match[] = {
 		.compatible = "renesas,r8a779h0-cpg-mssr",
 		.data = &r8a779h0_cpg_mssr_info,
 	},
+#endif
+#ifdef CONFIG_CLK_R9A09G077
+	{
+		.compatible = "renesas,r9a09g077-cpg-mssr",
+		.data = &r9a09g077_cpg_mssr_info,
+	},
 #endif
 	{ /* sentinel */ }
 };
@@ -1072,6 +1101,13 @@ static int __init cpg_mssr_common_init(struct device *dev,
 		error = -ENOMEM;
 		goto out_err;
 	}
+	if (info->reg_layout == CLK_REG_LAYOUT_RZ_T2H) {
+		priv->pub.base1 = of_iomap(np, 1);
+		if (!priv->pub.base1) {
+			error = -ENOMEM;
+			goto out_err;
+		}
+	}
 
 	priv->num_core_clks = info->num_total_core_clks;
 	priv->num_mod_clks = info->num_hw_mod_clks;
@@ -1085,6 +1121,8 @@ static int __init cpg_mssr_common_init(struct device *dev,
 		priv->reset_clear_regs = srstclr;
 	} else if (priv->reg_layout == CLK_REG_LAYOUT_RZ_A) {
 		priv->control_regs = stbcr;
+	} else if (priv->reg_layout == CLK_REG_LAYOUT_RZ_T2H) {
+		priv->control_regs = mstpcr_for_rzt2h;
 	} else if (priv->reg_layout == CLK_REG_LAYOUT_RCAR_GEN4) {
 		priv->status_regs = mstpsr_for_gen4;
 		priv->control_regs = mstpcr_for_gen4;
@@ -1115,6 +1153,8 @@ static int __init cpg_mssr_common_init(struct device *dev,
 out_err:
 	if (priv->pub.base0)
 		iounmap(priv->pub.base0);
+	if (priv->pub.base1)
+		iounmap(priv->pub.base1);
 	kfree(priv);
 
 	return error;
diff --git a/drivers/clk/renesas/renesas-cpg-mssr.h b/drivers/clk/renesas/renesas-cpg-mssr.h
index adc8948e6af4..a6e4a96ba036 100644
--- a/drivers/clk/renesas/renesas-cpg-mssr.h
+++ b/drivers/clk/renesas/renesas-cpg-mssr.h
@@ -22,6 +22,8 @@
 struct cpg_core_clk {
 	/* Common */
 	const char *name;
+	const char * const *parent_names;
+	const struct clk_div_table *dtable;
 	unsigned int id;
 	unsigned int type;
 	/* Depending on type */
@@ -29,18 +31,26 @@ struct cpg_core_clk {
 	unsigned int div;
 	unsigned int mult;
 	unsigned int offset;
+	unsigned int conf;
+	int flag;
+	int mux_flags;
+	int num_parents;
+	int sel_base;
+};
 
 /**
  * struct cpg_mssr_pub - Private data shared with
  * device-specific clk registration code
  *
  * @base0: CPG/MSSR register block base0 address
+ * @base1: CPG/MSSR register block base1 address
  * @rmw_lock: protects RMW register accesses
  * @notifiers: Notifier chain to save/restore clock state for system resume
  * @clks: pointer to clocks
  */
 struct cpg_mssr_pub {
 	void __iomem *base0;
+	void __iomem *base1;
 	struct raw_notifier_head notifiers;
 	spinlock_t rmw_lock;
 	struct clk **clks;
@@ -53,6 +63,8 @@ enum clk_types {
 	CLK_TYPE_DIV6P1,	/* DIV6 Clock with 1 parent clock */
 	CLK_TYPE_DIV6_RO,	/* DIV6 Clock read only with extra divisor */
 	CLK_TYPE_FR,		/* Fixed Rate Clock */
+	CLK_TYPE_DIV,		/* Clock with divider */
+	CLK_TYPE_MUX,		/* Clock with clock source selector */
 
 	/* Custom definitions start here */
 	CLK_TYPE_CUSTOM,
@@ -73,6 +85,15 @@ enum clk_types {
 	DEF_BASE(_name, _id, CLK_TYPE_DIV6_RO, _parent, .offset = _offset, .div = _div, .mult = 1)
 #define DEF_RATE(_name, _id, _rate)	\
 	DEF_TYPE(_name, _id, CLK_TYPE_FR, .mult = _rate)
+#define DEF_DIV(_name, _id, _parent, _conf, _dtable, _flag, _sel_base) \
+	DEF_TYPE(_name, _id, CLK_TYPE_DIV, .conf = _conf, \
+		 .parent = _parent, .dtable = _dtable, .flag = _flag, .sel_base = _sel_base)
+#define DEF_MUX(_name, _id, _conf, _parent_names, _num_parents, _flag, \
+		_mux_flags) \
+	DEF_TYPE(_name, _id, CLK_TYPE_MUX, .conf = _conf, \
+		 .parent_names = _parent_names, .num_parents = _num_parents, \
+		 .flag = _flag, .mux_flags = _mux_flags)
+
 
     /*
      * Definitions of Module Clocks
@@ -106,6 +127,7 @@ enum clk_reg_layout {
 	CLK_REG_LAYOUT_RCAR_GEN2_AND_GEN3 = 0,
 	CLK_REG_LAYOUT_RZ_A,
 	CLK_REG_LAYOUT_RCAR_GEN4,
+	CLK_REG_LAYOUT_RZ_T2H,
 };
 
     /**
@@ -198,6 +220,7 @@ extern const struct cpg_mssr_info r8a779a0_cpg_mssr_info;
 extern const struct cpg_mssr_info r8a779f0_cpg_mssr_info;
 extern const struct cpg_mssr_info r8a779g0_cpg_mssr_info;
 extern const struct cpg_mssr_info r8a779h0_cpg_mssr_info;
+extern const struct cpg_mssr_info r9a09g077_cpg_mssr_info;
 
 void __init cpg_mssr_early_init(struct device_node *np,
 				const struct cpg_mssr_info *info);
-- 
2.43.0

Re: [PATCH v2 06/13] clk: renesas: Add support for R9A09G077 SoC

[Paul Barker]

[-- Attachment #1.1.1: Type: text/plain, Size: 4183 bytes --]

Hi Thierry,

On 17/02/2025 10:52, Thierry Bultel wrote:
> RZ/T2H has 2 registers blocks at different addresses.
> 
> The clock tree has configurable dividers and mux selectors.
> Add these new clock types, new register layout type, and
> registration code for mux and div in registration callback.
> 
> Signed-off-by: Thierry Bultel <thierry.bultel.yh@bp.renesas.com>
> ---
>  drivers/clk/renesas/Kconfig              |   5 +
>  drivers/clk/renesas/Makefile             |   1 +
>  drivers/clk/renesas/r9a09g077-cpg-mssr.c | 237 +++++++++++++++++++++++
>  drivers/clk/renesas/renesas-cpg-mssr.c   |  40 ++++
>  drivers/clk/renesas/renesas-cpg-mssr.h   |  23 +++
>  5 files changed, 306 insertions(+)
>  create mode 100644 drivers/clk/renesas/r9a09g077-cpg-mssr.c
> 
> diff --git a/drivers/clk/renesas/Kconfig b/drivers/clk/renesas/Kconfig
> index ff01f5f0ed20..58ea50b0e5b8 100644
> --- a/drivers/clk/renesas/Kconfig
> +++ b/drivers/clk/renesas/Kconfig
> @@ -41,6 +41,7 @@ config CLK_RENESAS
>  	select CLK_R9A08G045 if ARCH_R9A08G045
>  	select CLK_R9A09G011 if ARCH_R9A09G011
>  	select CLK_R9A09G057 if ARCH_R9A09G057
> +	select CLK_R9A09G077 if ARCH_R9A09G077
>  	select CLK_SH73A0 if ARCH_SH73A0
>  
>  if CLK_RENESAS
> @@ -198,6 +199,10 @@ config CLK_R9A09G057
>         bool "RZ/V2H(P) clock support" if COMPILE_TEST
>         select CLK_RZV2H
>  
> +config CLK_R9A09G077
> +	bool "RZ/T2H clock support" if COMPILE_TEST
> +	select CLK_RZT2H

CLK_RZT2H isn't needed anymore. Instead we probably need to depend on
CLK_RENESAS_CPG_MSSR.

> +
>  config CLK_SH73A0
>  	bool "SH-Mobile AG5 clock support" if COMPILE_TEST
>  	select CLK_RENESAS_CPG_MSTP

[snip, now in drivers/clk/renesas/r9a09g077-cpg-mssr.c]

> +static struct clk * __init
> +	r9a09g077_cpg_clk_register(struct device *dev,

Looks like an extra tab crept in at the start of this line

[snip]

> diff --git a/drivers/clk/renesas/renesas-cpg-mssr.c b/drivers/clk/renesas/renesas-cpg-mssr.c
> index 7d5fba3aef19..2f5aa796b0c6 100644
> --- a/drivers/clk/renesas/renesas-cpg-mssr.c
> +++ b/drivers/clk/renesas/renesas-cpg-mssr.c
> @@ -79,6 +79,15 @@ static const u16 mstpcr_for_gen4[] = {
>  	0x2D60, 0x2D64, 0x2D68, 0x2D6C, 0x2D70, 0x2D74,
>  };
>  
> +/* Module Stop Control Register (RZ/T2H)
> + * RZ/T2H has 2 registers blocks. To differentiate them,
> + * 0x1000 is added to offsets of block 2
> + */
> +static const u16 mstpcr_for_rzt2h[] = {
> +	0x0300, 0x0304, 0x0308, 0x030C, 0x0310, 0x1318, 0x1320, 0x0324,
> +	0x0328, 0x032C, 0x0303, 0x1334,
> +};

Should the second to last entry be 0x0330 not 0x0303? I'm suspicious as
it doesn't match the alignment of the other entries.

We need some macros for this instead of just using 0x1000 in the
constants and the calculations below.

Perhaps,

#define RZT2H_MSTPCR_BLOCK_SHIFT	12
#define RZT2H_MSTPCR_OFFSET_MASK	GENMASK(11, 0)
#define RZT2H_MSTPCR(block, offset)	(((block) << RZT2H_MSTPCR_BLOCK_SHIFT) & ((offset) & RZT2H_MSTPCR_OFFSET_MASK))

#define RZT2H_MSTPCR_BLOCK(x)		((x) >> RZT2H_MSTPCR_BLOCK_SHIFT)
#define RZT2H_MSTPCR_OFFSET(x)		((x) & RZT2H_MSTPCR_OFFSET_MASK)

static const u16 mstpcr_for_rzt2h[] = {
	RZT2H_MSTPCR(0, 0x300), RZT2H_MSTPCR(0, 0x304), RZT2H_MSTPCR(0, 0x308), RZT2H_MSTPCR(0, 0x30c),
	RZT2H_MSTPCR(0, 0x310), RZT2H_MSTPCR(1, 0x318), RZT2H_MSTPCR(1, 0x320), RZT2H_MSTPCR(0, 0x324), 
	RZT2H_MSTPCR(0, 0x328), RZT2H_MSTPCR(0, 0x32c), RZT2H_MSTPCR(0, 0x330), RZT2H_MSTPCR(1, 0x334), 
};

> +
>  /*
>   * Standby Control Register offsets (RZ/A)
>   * Base address is FRQCR register
> @@ -189,6 +198,14 @@ struct mstp_clock {
>  
>  #define to_mstp_clock(_hw) container_of(_hw, struct mstp_clock, hw)
>  
> +static void *cpg_rzt2h_addr_from_offset(struct clk_hw *hw, u16 offset)
> +{
> +	struct mstp_clock *clock = to_mstp_clock(hw);
> +	struct cpg_mssr_priv *priv = clock->priv;
> +
> +	return offset + (offset > 0x1000 ? priv->pub.base1 - 0x1000 : priv->pub.base0);

Perhaps,

void *base = RZT2H_MSTPCR_BLOCK(offset) ? priv->pub.base1 : priv->pub.base0;
return base + RZT2H_MSTPCR_OFFSET(offset);

Thanks,

-- 
Paul Barker

[-- Attachment #1.1.2: OpenPGP public key --]
[-- Type: application/pgp-keys, Size: 3577 bytes --]

[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 236 bytes --]

[PATCH v2 07/13] serial: sh-sci: Fix a comment about SCIFA

[Thierry Bultel]

The comment was correct when it was added, at that time RZ/T1 was
the only SoC in the RZ/T line. Since then, further SoCs have been
added with RZ/T names which do not use the same SCIFA register
layout and so the comment is now misleading.

So we update the comment to explicitly reference only RZ/T1 SoCs.

Signed-off-by: Thierry Bultel <thierry.bultel.yh@bp.renesas.com>
---
 drivers/tty/serial/sh-sci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 924b803af440..b8f9034f891a 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -291,7 +291,7 @@ static const struct sci_port_params sci_port_params[SCIx_NR_REGTYPES] = {
 	},
 
 	/*
-	 * The "SCIFA" that is in RZ/A2, RZ/G2L and RZ/T.
+	 * The "SCIFA" that is in RZ/A2, RZ/G2L and RZ/T1.
 	 * It looks like a normal SCIF with FIFO data, but with a
 	 * compressed address space. Also, the break out of interrupts
 	 * are different: ERI/BRI, RXI, TXI, TEI, DRI.
-- 
2.43.0

Re: [PATCH v2 07/13] serial: sh-sci: Fix a comment about SCIFA

[Paul Barker]

[-- Attachment #1.1.1: Type: text/plain, Size: 1222 bytes --]

On 17/02/2025 10:52, Thierry Bultel wrote:
> The comment was correct when it was added, at that time RZ/T1 was
> the only SoC in the RZ/T line. Since then, further SoCs have been
> added with RZ/T names which do not use the same SCIFA register
> layout and so the comment is now misleading.
> 
> So we update the comment to explicitly reference only RZ/T1 SoCs.
> 
> Signed-off-by: Thierry Bultel <thierry.bultel.yh@bp.renesas.com>
> ---
>  drivers/tty/serial/sh-sci.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
> index 924b803af440..b8f9034f891a 100644
> --- a/drivers/tty/serial/sh-sci.c
> +++ b/drivers/tty/serial/sh-sci.c
> @@ -291,7 +291,7 @@ static const struct sci_port_params sci_port_params[SCIx_NR_REGTYPES] = {
>  	},
>  
>  	/*
> -	 * The "SCIFA" that is in RZ/A2, RZ/G2L and RZ/T.
> +	 * The "SCIFA" that is in RZ/A2, RZ/G2L and RZ/T1.
>  	 * It looks like a normal SCIF with FIFO data, but with a
>  	 * compressed address space. Also, the break out of interrupts
>  	 * are different: ERI/BRI, RXI, TXI, TEI, DRI.

Reviewed-by: Paul Barker <paul.barker.ct@bp.renesas.com>

-- 
Paul Barker

[-- Attachment #1.1.2: OpenPGP public key --]
[-- Type: application/pgp-keys, Size: 3577 bytes --]

[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 236 bytes --]

[PATCH v2 08/13] serial: sh-sci: Introduced function pointers

[Thierry Bultel]

The aim here is to prepare support for new sci controllers like
the T2H/RSCI whose registers are too much different for being
handled in common code.

This named serial controller also has 32 bits register,
so some return types had to be changed.

The needed generic functions are no longer static, with prototypes
defined in sh-sci-common.h so that they can be used from specific
implementation in a separate file, to keep this driver as little
changed as possible.

For doing so, a set of 'ops' is added to struct sci_port.

Signed-off-by: Thierry Bultel <thierry.bultel.yh@bp.renesas.com>
---
 drivers/tty/serial/sh-sci.c        | 337 +++++++++++++++--------------
 drivers/tty/serial/sh-sci_common.h | 171 +++++++++++++++
 2 files changed, 340 insertions(+), 168 deletions(-)
 create mode 100644 drivers/tty/serial/sh-sci_common.h

diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index b8f9034f891a..ace56375c044 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -56,19 +56,7 @@
 
 #include "serial_mctrl_gpio.h"
 #include "sh-sci.h"
-
-/* Offsets into the sci_port->irqs array */
-enum {
-	SCIx_ERI_IRQ,
-	SCIx_RXI_IRQ,
-	SCIx_TXI_IRQ,
-	SCIx_BRI_IRQ,
-	SCIx_DRI_IRQ,
-	SCIx_TEI_IRQ,
-	SCIx_NR_IRQS,
-
-	SCIx_MUX_IRQ = SCIx_NR_IRQS,	/* special case */
-};
+#include "sh-sci_common.h"
 
 #define SCIx_IRQ_IS_MUXED(port)			\
 	((port)->irqs[SCIx_ERI_IRQ] ==	\
@@ -76,101 +64,39 @@ enum {
 	((port)->irqs[SCIx_ERI_IRQ] &&	\
 	 ((port)->irqs[SCIx_RXI_IRQ] < 0))
 
-enum SCI_CLKS {
-	SCI_FCK,		/* Functional Clock */
-	SCI_SCK,		/* Optional External Clock */
-	SCI_BRG_INT,		/* Optional BRG Internal Clock Source */
-	SCI_SCIF_CLK,		/* Optional BRG External Clock Source */
-	SCI_NUM_CLKS
-};
-
-/* Bit x set means sampling rate x + 1 is supported */
-#define SCI_SR(x)		BIT((x) - 1)
 #define SCI_SR_RANGE(x, y)	GENMASK((y) - 1, (x) - 1)
 
 #define SCI_SR_SCIFAB		SCI_SR(5) | SCI_SR(7) | SCI_SR(11) | \
 				SCI_SR(13) | SCI_SR(16) | SCI_SR(17) | \
 				SCI_SR(19) | SCI_SR(27)
 
-#define min_sr(_port)		ffs((_port)->sampling_rate_mask)
-#define max_sr(_port)		fls((_port)->sampling_rate_mask)
-
 /* Iterate over all supported sampling rates, from high to low */
 #define for_each_sr(_sr, _port)						\
 	for ((_sr) = max_sr(_port); (_sr) >= min_sr(_port); (_sr)--)	\
 		if ((_port)->sampling_rate_mask & SCI_SR((_sr)))
 
-struct plat_sci_reg {
-	u8 offset, size;
-};
-
-struct sci_port_params {
-	const struct plat_sci_reg regs[SCIx_NR_REGS];
-	unsigned int fifosize;
-	unsigned int overrun_reg;
-	unsigned int overrun_mask;
-	unsigned int sampling_rate_mask;
-	unsigned int error_mask;
-	unsigned int error_clear;
-};
-
-struct sci_port {
-	struct uart_port	port;
-
-	/* Platform configuration */
-	const struct sci_port_params *params;
-	const struct plat_sci_port *cfg;
-	unsigned int		sampling_rate_mask;
-	resource_size_t		reg_size;
-	struct mctrl_gpios	*gpios;
-
-	/* Clocks */
-	struct clk		*clks[SCI_NUM_CLKS];
-	unsigned long		clk_rates[SCI_NUM_CLKS];
-
-	int			irqs[SCIx_NR_IRQS];
-	char			*irqstr[SCIx_NR_IRQS];
-
-	struct dma_chan			*chan_tx;
-	struct dma_chan			*chan_rx;
-
-#ifdef CONFIG_SERIAL_SH_SCI_DMA
-	struct dma_chan			*chan_tx_saved;
-	struct dma_chan			*chan_rx_saved;
-	dma_cookie_t			cookie_tx;
-	dma_cookie_t			cookie_rx[2];
-	dma_cookie_t			active_rx;
-	dma_addr_t			tx_dma_addr;
-	unsigned int			tx_dma_len;
-	struct scatterlist		sg_rx[2];
-	void				*rx_buf[2];
-	size_t				buf_len_rx;
-	struct work_struct		work_tx;
-	struct hrtimer			rx_timer;
-	unsigned int			rx_timeout;	/* microseconds */
-#endif
-	unsigned int			rx_frame;
-	int				rx_trigger;
-	struct timer_list		rx_fifo_timer;
-	int				rx_fifo_timeout;
-	u16				hscif_tot;
-
-	bool has_rtscts;
-	bool autorts;
-	bool tx_occurred;
-};
-
 #define SCI_NPORTS CONFIG_SERIAL_SH_SCI_NR_UARTS
 
 static struct sci_port sci_ports[SCI_NPORTS];
 static unsigned long sci_ports_in_use;
 static struct uart_driver sci_uart_driver;
 
-static inline struct sci_port *
-to_sci_port(struct uart_port *uart)
-{
-	return container_of(uart, struct sci_port, port);
-}
+static const struct sci_port_params_bits sci_sci_port_params_bits = {
+	.rxtx_enable = SCSCR_RE | SCSCR_TE,
+	.te_clear = SCSCR_TE | SCSCR_TEIE,
+	.poll_sent_bits = SCI_FER | SCI_TEND
+};
+
+static const struct sci_port_params_bits sci_scix_port_params_bits = {
+	.rxtx_enable = SCSCR_RE | SCSCR_TE,
+	.te_clear = SCSCR_TE | SCSCR_TEIE,
+	.poll_sent_bits = SCIF_TDFE | SCIF_TEND
+};
+
+static const struct sci_common_regs sci_common_regs = {
+	.status = SCxSR,
+	.control = SCSCR,
+};
 
 static const struct sci_port_params sci_port_params[SCIx_NR_REGTYPES] = {
 	/*
@@ -192,6 +118,8 @@ static const struct sci_port_params sci_port_params[SCIx_NR_REGTYPES] = {
 		.sampling_rate_mask = SCI_SR(32),
 		.error_mask = SCI_DEFAULT_ERROR_MASK | SCI_ORER,
 		.error_clear = SCI_ERROR_CLEAR & ~SCI_ORER,
+		.param_bits = &sci_sci_port_params_bits,
+		.common_regs = &sci_common_regs,
 	},
 
 	/*
@@ -214,6 +142,8 @@ static const struct sci_port_params sci_port_params[SCIx_NR_REGTYPES] = {
 		.sampling_rate_mask = SCI_SR(32),
 		.error_mask = SCI_DEFAULT_ERROR_MASK | SCI_ORER,
 		.error_clear = SCI_ERROR_CLEAR & ~SCI_ORER,
+		.param_bits = &sci_scix_port_params_bits,
+		.common_regs = &sci_common_regs,
 	},
 
 	/*
@@ -238,6 +168,8 @@ static const struct sci_port_params sci_port_params[SCIx_NR_REGTYPES] = {
 		.sampling_rate_mask = SCI_SR_SCIFAB,
 		.error_mask = SCIF_DEFAULT_ERROR_MASK | SCIFA_ORER,
 		.error_clear = SCIF_ERROR_CLEAR & ~SCIFA_ORER,
+		.param_bits = &sci_scix_port_params_bits,
+		.common_regs = &sci_common_regs,
 	},
 
 	/*
@@ -263,6 +195,8 @@ static const struct sci_port_params sci_port_params[SCIx_NR_REGTYPES] = {
 		.sampling_rate_mask = SCI_SR_SCIFAB,
 		.error_mask = SCIF_DEFAULT_ERROR_MASK | SCIFA_ORER,
 		.error_clear = SCIF_ERROR_CLEAR & ~SCIFA_ORER,
+		.param_bits = &sci_scix_port_params_bits,
+		.common_regs = &sci_common_regs,
 	},
 
 	/*
@@ -288,6 +222,8 @@ static const struct sci_port_params sci_port_params[SCIx_NR_REGTYPES] = {
 		.sampling_rate_mask = SCI_SR(32),
 		.error_mask = SCIF_DEFAULT_ERROR_MASK,
 		.error_clear = SCIF_ERROR_CLEAR,
+		.param_bits = &sci_scix_port_params_bits,
+		.common_regs = &sci_common_regs,
 	},
 
 	/*
@@ -316,6 +252,8 @@ static const struct sci_port_params sci_port_params[SCIx_NR_REGTYPES] = {
 		.sampling_rate_mask = SCI_SR(32),
 		.error_mask = SCIF_DEFAULT_ERROR_MASK,
 		.error_clear = SCIF_ERROR_CLEAR,
+		.param_bits = &sci_scix_port_params_bits,
+		.common_regs = &sci_common_regs,
 	},
 
 	/*
@@ -347,6 +285,8 @@ static const struct sci_port_params sci_port_params[SCIx_NR_REGTYPES] = {
 		.sampling_rate_mask = SCI_SR(32),
 		.error_mask = SCIF_DEFAULT_ERROR_MASK,
 		.error_clear = SCIF_ERROR_CLEAR,
+		.param_bits = &sci_scix_port_params_bits,
+		.common_regs = &sci_common_regs,
 	},
 
 	/*
@@ -369,6 +309,8 @@ static const struct sci_port_params sci_port_params[SCIx_NR_REGTYPES] = {
 		.sampling_rate_mask = SCI_SR(32),
 		.error_mask = SCIF_DEFAULT_ERROR_MASK,
 		.error_clear = SCIF_ERROR_CLEAR,
+		.param_bits = &sci_scix_port_params_bits,
+		.common_regs = &sci_common_regs,
 	},
 
 	/*
@@ -393,6 +335,8 @@ static const struct sci_port_params sci_port_params[SCIx_NR_REGTYPES] = {
 		.sampling_rate_mask = SCI_SR(32),
 		.error_mask = SCIF_DEFAULT_ERROR_MASK,
 		.error_clear = SCIF_ERROR_CLEAR,
+		.param_bits = &sci_scix_port_params_bits,
+		.common_regs = &sci_common_regs,
 	},
 
 	/*
@@ -420,6 +364,8 @@ static const struct sci_port_params sci_port_params[SCIx_NR_REGTYPES] = {
 		.sampling_rate_mask = SCI_SR(32),
 		.error_mask = SCIF_DEFAULT_ERROR_MASK,
 		.error_clear = SCIF_ERROR_CLEAR,
+		.param_bits = &sci_scix_port_params_bits,
+		.common_regs = &sci_common_regs,
 	},
 
 	/*
@@ -449,6 +395,8 @@ static const struct sci_port_params sci_port_params[SCIx_NR_REGTYPES] = {
 		.sampling_rate_mask = SCI_SR_RANGE(8, 32),
 		.error_mask = SCIF_DEFAULT_ERROR_MASK,
 		.error_clear = SCIF_ERROR_CLEAR,
+		.param_bits = &sci_scix_port_params_bits,
+		.common_regs = &sci_common_regs,
 	},
 
 	/*
@@ -473,6 +421,8 @@ static const struct sci_port_params sci_port_params[SCIx_NR_REGTYPES] = {
 		.sampling_rate_mask = SCI_SR(32),
 		.error_mask = SCIF_DEFAULT_ERROR_MASK,
 		.error_clear = SCIF_ERROR_CLEAR,
+		.param_bits = &sci_scix_port_params_bits,
+		.common_regs = &sci_common_regs,
 	},
 
 	/*
@@ -500,6 +450,8 @@ static const struct sci_port_params sci_port_params[SCIx_NR_REGTYPES] = {
 		.sampling_rate_mask = SCI_SR(32),
 		.error_mask = SCIF_DEFAULT_ERROR_MASK,
 		.error_clear = SCIF_ERROR_CLEAR,
+		.param_bits = &sci_scix_port_params_bits,
+		.common_regs = &sci_common_regs,
 	},
 
 	/*
@@ -523,6 +475,8 @@ static const struct sci_port_params sci_port_params[SCIx_NR_REGTYPES] = {
 		.sampling_rate_mask = SCI_SR(16),
 		.error_mask = SCIF_DEFAULT_ERROR_MASK | SCIFA_ORER,
 		.error_clear = SCIF_ERROR_CLEAR & ~SCIFA_ORER,
+		.param_bits = &sci_scix_port_params_bits,
+		.common_regs = &sci_common_regs,
 	},
 };
 
@@ -560,7 +514,7 @@ static void sci_serial_out(struct uart_port *p, int offset, int value)
 		WARN(1, "Invalid register access\n");
 }
 
-static void sci_port_enable(struct sci_port *sci_port)
+void sci_port_enable(struct sci_port *sci_port)
 {
 	unsigned int i;
 
@@ -576,7 +530,7 @@ static void sci_port_enable(struct sci_port *sci_port)
 	sci_port->port.uartclk = sci_port->clk_rates[SCI_FCK];
 }
 
-static void sci_port_disable(struct sci_port *sci_port)
+void sci_port_disable(struct sci_port *sci_port)
 {
 	unsigned int i;
 
@@ -713,15 +667,16 @@ static void sci_clear_SCxSR(struct uart_port *port, unsigned int mask)
     defined(CONFIG_SERIAL_SH_SCI_EARLYCON)
 
 #ifdef CONFIG_CONSOLE_POLL
-static int sci_poll_get_char(struct uart_port *port)
+int sci_poll_get_char(struct uart_port *port)
 {
 	unsigned short status;
+	struct sci_port *s = to_sci_port(port);
 	int c;
 
 	do {
 		status = sci_serial_in(port, SCxSR);
 		if (status & SCxSR_ERRORS(port)) {
-			sci_clear_SCxSR(port, SCxSR_ERROR_CLEAR(port));
+			s->ops->clear_SCxSR(port, SCxSR_ERROR_CLEAR(port));
 			continue;
 		}
 		break;
@@ -734,7 +689,7 @@ static int sci_poll_get_char(struct uart_port *port)
 
 	/* Dummy read */
 	sci_serial_in(port, SCxSR);
-	sci_clear_SCxSR(port, SCxSR_RDxF_CLEAR(port));
+	s->ops->clear_SCxSR(port, SCxSR_RDxF_CLEAR(port));
 
 	return c;
 }
@@ -742,14 +697,16 @@ static int sci_poll_get_char(struct uart_port *port)
 
 static void sci_poll_put_char(struct uart_port *port, unsigned char c)
 {
-	unsigned short status;
+	struct sci_port *s = to_sci_port(port);
+	const struct sci_common_regs *regs = s->params->common_regs;
+	unsigned int status;
 
 	do {
-		status = sci_serial_in(port, SCxSR);
+		status = s->ops->read_reg(port, regs->status);
 	} while (!(status & SCxSR_TDxE(port)));
 
 	sci_serial_out(port, SCxTDR, c);
-	sci_clear_SCxSR(port, SCxSR_TDxE_CLEAR(port) & ~SCxSR_TEND(port));
+	s->ops->clear_SCxSR(port, SCxSR_TDxE_CLEAR(port) & ~SCxSR_TEND(port));
 }
 #endif /* CONFIG_CONSOLE_POLL || CONFIG_SERIAL_SH_SCI_CONSOLE ||
 	  CONFIG_SERIAL_SH_SCI_EARLYCON */
@@ -892,7 +849,7 @@ static void sci_transmit_chars(struct uart_port *port)
 		port->icount.tx++;
 	} while (--count > 0);
 
-	sci_clear_SCxSR(port, SCxSR_TDxE_CLEAR(port));
+	s->ops->clear_SCxSR(port, SCxSR_TDxE_CLEAR(port));
 
 	if (kfifo_len(&tport->xmit_fifo) < WAKEUP_CHARS)
 		uart_write_wakeup(port);
@@ -911,6 +868,7 @@ static void sci_transmit_chars(struct uart_port *port)
 static void sci_receive_chars(struct uart_port *port)
 {
 	struct tty_port *tport = &port->state->port;
+	struct sci_port *s = to_sci_port(port);
 	int i, count, copied = 0;
 	unsigned short status;
 	unsigned char flag;
@@ -965,7 +923,7 @@ static void sci_receive_chars(struct uart_port *port)
 		}
 
 		sci_serial_in(port, SCxSR); /* dummy read */
-		sci_clear_SCxSR(port, SCxSR_RDxF_CLEAR(port));
+		s->ops->clear_SCxSR(port, SCxSR_RDxF_CLEAR(port));
 
 		copied += count;
 		port->icount.rx += count;
@@ -978,16 +936,17 @@ static void sci_receive_chars(struct uart_port *port)
 		/* TTY buffers full; read from RX reg to prevent lockup */
 		sci_serial_in(port, SCxRDR);
 		sci_serial_in(port, SCxSR); /* dummy read */
-		sci_clear_SCxSR(port, SCxSR_RDxF_CLEAR(port));
+		s->ops->clear_SCxSR(port, SCxSR_RDxF_CLEAR(port));
 	}
 }
 
 static int sci_handle_errors(struct uart_port *port)
 {
 	int copied = 0;
-	unsigned short status = sci_serial_in(port, SCxSR);
-	struct tty_port *tport = &port->state->port;
 	struct sci_port *s = to_sci_port(port);
+	const struct sci_common_regs *regs = s->params->common_regs;
+	unsigned int status = s->ops->read_reg(port, regs->status);
+	struct tty_port *tport = &port->state->port;
 
 	/* Handle overruns */
 	if (status & s->params->overrun_mask) {
@@ -1146,7 +1105,7 @@ static void rx_fifo_timer_fn(struct timer_list *t)
 	struct uart_port *port = &s->port;
 
 	dev_dbg(port->dev, "Rx timed out\n");
-	scif_set_rtrg(port, 1);
+	s->ops->set_rtrg(port, 1);
 }
 
 static ssize_t rx_fifo_trigger_show(struct device *dev,
@@ -1171,9 +1130,9 @@ static ssize_t rx_fifo_trigger_store(struct device *dev,
 	if (ret)
 		return ret;
 
-	sci->rx_trigger = scif_set_rtrg(port, r);
+	sci->rx_trigger = sci->ops->set_rtrg(port, r);
 	if (port->type == PORT_SCIFA || port->type == PORT_SCIFB)
-		scif_set_rtrg(port, 1);
+		sci->ops->set_rtrg(port, 1);
 
 	return count;
 }
@@ -1216,7 +1175,7 @@ static ssize_t rx_fifo_timeout_store(struct device *dev,
 		sci->hscif_tot = r << HSSCR_TOT_SHIFT;
 	} else {
 		sci->rx_fifo_timeout = r;
-		scif_set_rtrg(port, 1);
+		sci->ops->set_rtrg(port, 1);
 		if (r > 0)
 			timer_setup(&sci->rx_fifo_timer, rx_fifo_timer_fn, 0);
 	}
@@ -1341,7 +1300,7 @@ static void sci_dma_rx_reenable_irq(struct sci_port *s)
 	    s->cfg->regtype == SCIx_RZ_SCIFA_REGTYPE) {
 		enable_irq(s->irqs[SCIx_RXI_IRQ]);
 		if (s->cfg->regtype == SCIx_RZ_SCIFA_REGTYPE)
-			scif_set_rtrg(port, s->rx_trigger);
+			s->ops->set_rtrg(port, s->rx_trigger);
 		else
 			scr &= ~SCSCR_RDRQE;
 	}
@@ -1623,7 +1582,7 @@ static struct dma_chan *sci_request_dma_chan(struct uart_port *port,
 	return chan;
 }
 
-static void sci_request_dma(struct uart_port *port)
+void sci_request_dma(struct uart_port *port)
 {
 	struct sci_port *s = to_sci_port(port);
 	struct tty_port *tport = &port->state->port;
@@ -1711,7 +1670,7 @@ static void sci_request_dma(struct uart_port *port)
 	}
 }
 
-static void sci_free_dma(struct uart_port *port)
+void sci_free_dma(struct uart_port *port)
 {
 	struct sci_port *s = to_sci_port(port);
 
@@ -1721,7 +1680,7 @@ static void sci_free_dma(struct uart_port *port)
 		sci_dma_rx_release(s);
 }
 
-static void sci_flush_buffer(struct uart_port *port)
+void sci_flush_buffer(struct uart_port *port)
 {
 	struct sci_port *s = to_sci_port(port);
 
@@ -1750,11 +1709,11 @@ static void sci_dma_check_tx_occurred(struct sci_port *s)
 		s->tx_occurred = true;
 }
 #else /* !CONFIG_SERIAL_SH_SCI_DMA */
-static inline void sci_request_dma(struct uart_port *port)
+inline void sci_request_dma(struct uart_port *port)
 {
 }
 
-static inline void sci_free_dma(struct uart_port *port)
+inline void sci_free_dma(struct uart_port *port)
 {
 }
 
@@ -1762,7 +1721,9 @@ static void sci_dma_check_tx_occurred(struct sci_port *s)
 {
 }
 
-#define sci_flush_buffer	NULL
+inline void sci_flush_buffer(struct uart_port *port)
+{
+}
 #endif /* !CONFIG_SERIAL_SH_SCI_DMA */
 
 static irqreturn_t sci_rx_interrupt(int irq, void *ptr)
@@ -1780,7 +1741,7 @@ static irqreturn_t sci_rx_interrupt(int irq, void *ptr)
 		    s->cfg->regtype == SCIx_RZ_SCIFA_REGTYPE) {
 			disable_irq_nosync(s->irqs[SCIx_RXI_IRQ]);
 			if (s->cfg->regtype == SCIx_RZ_SCIFA_REGTYPE) {
-				scif_set_rtrg(port, 1);
+				s->ops->set_rtrg(port, 1);
 				scr |= SCSCR_RIE;
 			} else {
 				scr |= SCSCR_RDRQE;
@@ -1806,8 +1767,8 @@ static irqreturn_t sci_rx_interrupt(int irq, void *ptr)
 #endif
 
 	if (s->rx_trigger > 1 && s->rx_fifo_timeout > 0) {
-		if (!scif_rtrg_enabled(port))
-			scif_set_rtrg(port, s->rx_trigger);
+		if (!s->ops->rtrg_enabled(port))
+			s->ops->set_rtrg(port, s->rx_trigger);
 
 		mod_timer(&s->rx_fifo_timer, jiffies + DIV_ROUND_UP(
 			  s->rx_frame * HZ * s->rx_fifo_timeout, 1000000));
@@ -1817,7 +1778,7 @@ static irqreturn_t sci_rx_interrupt(int irq, void *ptr)
 	 * of whether the I_IXOFF is set, otherwise, how is the interrupt
 	 * to be disabled?
 	 */
-	sci_receive_chars(port);
+	s->ops->receive_chars(port);
 
 	return IRQ_HANDLED;
 }
@@ -1826,9 +1787,10 @@ static irqreturn_t sci_tx_interrupt(int irq, void *ptr)
 {
 	struct uart_port *port = ptr;
 	unsigned long flags;
+	struct sci_port *s = to_sci_port(port);
 
 	uart_port_lock_irqsave(port, &flags);
-	sci_transmit_chars(port);
+	s->ops->transmit_chars(port);
 	uart_port_unlock_irqrestore(port, flags);
 
 	return IRQ_HANDLED;
@@ -1837,16 +1799,19 @@ static irqreturn_t sci_tx_interrupt(int irq, void *ptr)
 static irqreturn_t sci_tx_end_interrupt(int irq, void *ptr)
 {
 	struct uart_port *port = ptr;
+	struct sci_port *s = to_sci_port(port);
+	const struct sci_common_regs *regs = s->params->common_regs;
 	unsigned long flags;
-	unsigned short ctrl;
+	u32 ctrl;
 
 	if (port->type != PORT_SCI)
 		return sci_tx_interrupt(irq, ptr);
 
 	uart_port_lock_irqsave(port, &flags);
-	ctrl = sci_serial_in(port, SCSCR);
-	ctrl &= ~(SCSCR_TE | SCSCR_TEIE);
-	sci_serial_out(port, SCSCR, ctrl);
+	ctrl = s->ops->read_reg(port, regs->control);
+
+	ctrl &= ~(s->params->param_bits->te_clear);
+	s->ops->write_reg(port, regs->control, ctrl);
 	uart_port_unlock_irqrestore(port, flags);
 
 	return IRQ_HANDLED;
@@ -1855,6 +1820,7 @@ static irqreturn_t sci_tx_end_interrupt(int irq, void *ptr)
 static irqreturn_t sci_br_interrupt(int irq, void *ptr)
 {
 	struct uart_port *port = ptr;
+	struct sci_port *s = to_sci_port(port);
 
 	/* Handle BREAKs */
 	sci_handle_breaks(port);
@@ -1862,7 +1828,7 @@ static irqreturn_t sci_br_interrupt(int irq, void *ptr)
 	/* drop invalid character received before break was detected */
 	sci_serial_in(port, SCxRDR);
 
-	sci_clear_SCxSR(port, SCxSR_BREAK_CLEAR(port));
+	s->ops->clear_SCxSR(port, SCxSR_BREAK_CLEAR(port));
 
 	return IRQ_HANDLED;
 }
@@ -1890,15 +1856,15 @@ static irqreturn_t sci_er_interrupt(int irq, void *ptr)
 		if (sci_handle_errors(port)) {
 			/* discard character in rx buffer */
 			sci_serial_in(port, SCxSR);
-			sci_clear_SCxSR(port, SCxSR_RDxF_CLEAR(port));
+			s->ops->clear_SCxSR(port, SCxSR_RDxF_CLEAR(port));
 		}
 	} else {
 		sci_handle_fifo_overrun(port);
 		if (!s->chan_rx)
-			sci_receive_chars(port);
+			s->ops->receive_chars(port);
 	}
 
-	sci_clear_SCxSR(port, SCxSR_ERROR_CLEAR(port));
+	s->ops->clear_SCxSR(port, SCxSR_ERROR_CLEAR(port));
 
 	/* Kick the transmission */
 	if (!s->chan_tx)
@@ -2059,7 +2025,7 @@ static int sci_request_irq(struct sci_port *port)
 	return ret;
 }
 
-static void sci_free_irq(struct sci_port *port)
+void sci_free_irq(struct sci_port *port)
 {
 	int i, j;
 
@@ -2232,7 +2198,7 @@ static unsigned int sci_get_mctrl(struct uart_port *port)
 	return mctrl;
 }
 
-static void sci_enable_ms(struct uart_port *port)
+void sci_enable_ms(struct uart_port *port)
 {
 	mctrl_gpio_enable_ms(to_sci_port(port)->gpios);
 }
@@ -2268,7 +2234,17 @@ static void sci_break_ctl(struct uart_port *port, int break_state)
 	uart_port_unlock_irqrestore(port, flags);
 }
 
-static int sci_startup(struct uart_port *port)
+static void sci_shutdown_complete(struct uart_port *port)
+{
+	struct sci_port *s = to_sci_port(port);
+	u16 scr;
+
+	scr = sci_serial_in(port, SCSCR);
+	sci_serial_out(port, SCSCR,
+		       scr & (SCSCR_CKE1 | SCSCR_CKE0 | s->hscif_tot));
+}
+
+int sci_startup(struct uart_port *port)
 {
 	struct sci_port *s = to_sci_port(port);
 	int ret;
@@ -2291,7 +2267,6 @@ static void sci_shutdown(struct uart_port *port)
 {
 	struct sci_port *s = to_sci_port(port);
 	unsigned long flags;
-	u16 scr;
 
 	dev_dbg(port->dev, "%s(%d)\n", __func__, port->line);
 
@@ -2301,13 +2276,7 @@ static void sci_shutdown(struct uart_port *port)
 	uart_port_lock_irqsave(port, &flags);
 	sci_stop_rx(port);
 	sci_stop_tx(port);
-	/*
-	 * Stop RX and TX, disable related interrupts, keep clock source
-	 * and HSCIF TOT bits
-	 */
-	scr = sci_serial_in(port, SCSCR);
-	sci_serial_out(port, SCSCR,
-		       scr & (SCSCR_CKE1 | SCSCR_CKE0 | s->hscif_tot));
+	s->ops->shutdown_complete(port);
 	uart_port_unlock_irqrestore(port, flags);
 
 #ifdef CONFIG_SERIAL_SH_SCI_DMA
@@ -2383,9 +2352,9 @@ static int sci_brg_calc(struct sci_port *s, unsigned int bps,
 }
 
 /* calculate sample rate, BRR, and clock select */
-static int sci_scbrr_calc(struct sci_port *s, unsigned int bps,
-			  unsigned int *brr, unsigned int *srr,
-			  unsigned int *cks)
+int sci_scbrr_calc(struct sci_port *s, unsigned int bps,
+		   unsigned int *brr, unsigned int *srr,
+		   unsigned int *cks)
 {
 	unsigned long freq = s->clk_rates[SCI_FCK];
 	unsigned int sr, br, prediv, scrate, c;
@@ -2462,9 +2431,9 @@ static void sci_reset(struct uart_port *port)
 	if (reg->size)
 		sci_serial_out(port, SCFCR, SCFCR_RFRST | SCFCR_TFRST);
 
-	sci_clear_SCxSR(port,
-			SCxSR_RDxF_CLEAR(port) & SCxSR_ERROR_CLEAR(port) &
-			SCxSR_BREAK_CLEAR(port));
+	s->ops->clear_SCxSR(port,
+			    SCxSR_RDxF_CLEAR(port) & SCxSR_ERROR_CLEAR(port) &
+			    SCxSR_BREAK_CLEAR(port));
 	if (sci_getreg(port, SCLSR)->size) {
 		status = sci_serial_in(port, SCLSR);
 		status &= ~(SCLSR_TO | SCLSR_ORER);
@@ -2473,14 +2442,14 @@ static void sci_reset(struct uart_port *port)
 
 	if (s->rx_trigger > 1) {
 		if (s->rx_fifo_timeout) {
-			scif_set_rtrg(port, 1);
+			s->ops->set_rtrg(port, 1);
 			timer_setup(&s->rx_fifo_timer, rx_fifo_timer_fn, 0);
 		} else {
 			if (port->type == PORT_SCIFA ||
 			    port->type == PORT_SCIFB)
-				scif_set_rtrg(port, 1);
+				s->ops->set_rtrg(port, 1);
 			else
-				scif_set_rtrg(port, s->rx_trigger);
+				s->ops->set_rtrg(port, s->rx_trigger);
 		}
 	}
 }
@@ -2740,7 +2709,7 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
 		sci_enable_ms(port);
 }
 
-static void sci_pm(struct uart_port *port, unsigned int state,
+void sci_pm(struct uart_port *port, unsigned int state,
 		   unsigned int oldstate)
 {
 	struct sci_port *sci_port = to_sci_port(port);
@@ -2803,7 +2772,7 @@ static int sci_remap_port(struct uart_port *port)
 	return 0;
 }
 
-static void sci_release_port(struct uart_port *port)
+void sci_release_port(struct uart_port *port)
 {
 	struct sci_port *sport = to_sci_port(port);
 
@@ -2815,7 +2784,7 @@ static void sci_release_port(struct uart_port *port)
 	release_mem_region(port->mapbase, sport->reg_size);
 }
 
-static int sci_request_port(struct uart_port *port)
+int sci_request_port(struct uart_port *port)
 {
 	struct resource *res;
 	struct sci_port *sport = to_sci_port(port);
@@ -2837,7 +2806,7 @@ static int sci_request_port(struct uart_port *port)
 	return 0;
 }
 
-static void sci_config_port(struct uart_port *port, int flags)
+void sci_config_port(struct uart_port *port, int flags)
 {
 	if (flags & UART_CONFIG_TYPE) {
 		struct sci_port *sport = to_sci_port(port);
@@ -2847,7 +2816,7 @@ static void sci_config_port(struct uart_port *port, int flags)
 	}
 }
 
-static int sci_verify_port(struct uart_port *port, struct serial_struct *ser)
+int sci_verify_port(struct uart_port *port, struct serial_struct *ser)
 {
 	if (ser->baud_base < 2400)
 		/* No paper tape reader for Mitch.. */
@@ -2856,6 +2825,17 @@ static int sci_verify_port(struct uart_port *port, struct serial_struct *ser)
 	return 0;
 }
 
+static void sci_prepare_console_write(struct uart_port *port, u32 ctrl)
+{
+	struct sci_port *s = to_sci_port(port);
+	u32 ctrl_temp =
+		s->params->param_bits->rxtx_enable |
+		(s->cfg->scscr & ~(SCSCR_CKE1 | SCSCR_CKE0)) |
+		(ctrl & (SCSCR_CKE1 | SCSCR_CKE0)) |
+		s->hscif_tot;
+	sci_serial_out(port, SCSCR, ctrl_temp);
+}
+
 static const struct uart_ops sci_uart_ops = {
 	.tx_empty	= sci_tx_empty,
 	.set_mctrl	= sci_set_mctrl,
@@ -2881,6 +2861,19 @@ static const struct uart_ops sci_uart_ops = {
 #endif
 };
 
+static const struct sci_port_ops sci_port_ops = {
+	.read_reg		= sci_serial_in,
+	.write_reg		= sci_serial_out,
+	.receive_chars		= sci_receive_chars,
+	.transmit_chars		= sci_transmit_chars,
+	.poll_put_char		= sci_poll_put_char,
+	.clear_SCxSR		= sci_clear_SCxSR,
+	.set_rtrg		= scif_set_rtrg,
+	.rtrg_enabled		= scif_rtrg_enabled,
+	.shutdown_complete	= sci_shutdown_complete,
+	.prepare_console_write	= sci_prepare_console_write,
+};
+
 static int sci_init_clocks(struct sci_port *sci_port, struct device *dev)
 {
 	const char *clk_names[] = {
@@ -2974,6 +2967,7 @@ static int sci_init_single(struct platform_device *dev,
 	int ret;
 
 	sci_port->cfg	= p;
+	sci_port->ops	= &sci_port_ops;
 
 	port->ops	= &sci_uart_ops;
 	port->iotype	= UPIO_MEM;
@@ -3095,7 +3089,7 @@ static void sci_cleanup_single(struct sci_port *port)
     defined(CONFIG_SERIAL_SH_SCI_EARLYCON)
 static void serial_console_putchar(struct uart_port *port, unsigned char ch)
 {
-	sci_poll_put_char(port, ch);
+	to_sci_port(port)->ops->poll_put_char(port, ch);
 }
 
 /*
@@ -3107,7 +3101,9 @@ static void serial_console_write(struct console *co, const char *s,
 {
 	struct sci_port *sci_port = &sci_ports[co->index];
 	struct uart_port *port = &sci_port->port;
-	unsigned short bits, ctrl, ctrl_temp;
+	const struct sci_common_regs *regs = sci_port->params->common_regs;
+	unsigned int bits;
+	u32 ctrl;
 	unsigned long flags;
 	int locked = 1;
 
@@ -3119,21 +3115,21 @@ static void serial_console_write(struct console *co, const char *s,
 		uart_port_lock_irqsave(port, &flags);
 
 	/* first save SCSCR then disable interrupts, keep clock source */
-	ctrl = sci_serial_in(port, SCSCR);
-	ctrl_temp = SCSCR_RE | SCSCR_TE |
-		    (sci_port->cfg->scscr & ~(SCSCR_CKE1 | SCSCR_CKE0)) |
-		    (ctrl & (SCSCR_CKE1 | SCSCR_CKE0));
-	sci_serial_out(port, SCSCR, ctrl_temp | sci_port->hscif_tot);
+
+	ctrl = sci_port->ops->read_reg(port, regs->control);
+	sci_port->ops->prepare_console_write(port, ctrl);
 
 	uart_console_write(port, s, count, serial_console_putchar);
 
 	/* wait until fifo is empty and last bit has been transmitted */
-	bits = SCxSR_TDxE(port) | SCxSR_TEND(port);
-	while ((sci_serial_in(port, SCxSR) & bits) != bits)
+
+	bits = sci_ports->params->param_bits->poll_sent_bits;
+
+	while ((sci_port->ops->read_reg(port, regs->status) & bits) != bits)
 		cpu_relax();
 
 	/* restore the SCSCR */
-	sci_serial_out(port, SCSCR, ctrl);
+	sci_port->ops->write_reg(port, regs->control, ctrl);
 
 	if (locked)
 		uart_port_unlock_irqrestore(port, flags);
@@ -3268,7 +3264,6 @@ static void sci_remove(struct platform_device *dev)
 		device_remove_file(&dev->dev, &dev_attr_rx_fifo_timeout);
 }
 
-
 #define SCI_OF_DATA(type, regtype)	(void *)((type) << 16 | (regtype))
 #define SCI_OF_TYPE(data)		((unsigned long)(data) >> 16)
 #define SCI_OF_REGTYPE(data)		((unsigned long)(data) & 0xffff)
@@ -3564,9 +3559,11 @@ sh_early_platform_init_buffer("earlyprintk", &sci_driver,
 #ifdef CONFIG_SERIAL_SH_SCI_EARLYCON
 static struct plat_sci_port port_cfg __initdata;
 
-static int __init early_console_setup(struct earlycon_device *device,
+int __init early_console_setup(struct earlycon_device *device,
 				      int type)
 {
+	const struct sci_common_regs *regs;
+
 	if (!device->port.membase)
 		return -ENODEV;
 
@@ -3574,10 +3571,14 @@ static int __init early_console_setup(struct earlycon_device *device,
 	memcpy(&sci_ports[0].port, &device->port, sizeof(struct uart_port));
 	port_cfg.type = type;
 	sci_ports[0].cfg = &port_cfg;
+	sci_ports[0].ops = &sci_port_ops;
 	sci_ports[0].params = sci_probe_regmap(&port_cfg);
-	port_cfg.scscr = sci_serial_in(&sci_ports[0].port, SCSCR);
-	sci_serial_out(&sci_ports[0].port, SCSCR,
-		       SCSCR_RE | SCSCR_TE | port_cfg.scscr);
+	regs = sci_ports[0].params->common_regs;
+
+	port_cfg.scscr = sci_ports[0].ops->read_reg(&sci_ports[0].port, regs->control);
+	sci_ports[0].ops->write_reg(&sci_ports[0].port,
+				    regs->control,
+				    sci_ports[0].params->param_bits->rxtx_enable | port_cfg.scscr);
 
 	device->con->write = serial_console_write;
 	return 0;
diff --git a/drivers/tty/serial/sh-sci_common.h b/drivers/tty/serial/sh-sci_common.h
new file mode 100644
index 000000000000..0bc49ab277b5
--- /dev/null
+++ b/drivers/tty/serial/sh-sci_common.h
@@ -0,0 +1,171 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __SH_SCI_COMMON_H__
+#define __SH_SCI_COMMON_H__
+
+#define SCI_MAJOR	204
+#define SCI_MINOR_START	8
+
+#include <linux/serial_core.h>
+
+enum SCI_CLKS {
+	SCI_FCK,		/* Functional Clock */
+	SCI_SCK,		/* Optional External Clock */
+	SCI_BRG_INT,		/* Optional BRG Internal Clock Source */
+	SCI_SCIF_CLK,		/* Optional BRG External Clock Source */
+	SCI_NUM_CLKS
+};
+
+/* Offsets into the sci_port->irqs array */
+enum {
+	SCIx_ERI_IRQ,
+	SCIx_RXI_IRQ,
+	SCIx_TXI_IRQ,
+	SCIx_BRI_IRQ,
+	SCIx_DRI_IRQ,
+	SCIx_TEI_IRQ,
+	SCIx_NR_IRQS,
+
+	SCIx_MUX_IRQ = SCIx_NR_IRQS,	/* special case */
+};
+
+/* Bit x set means sampling rate x + 1 is supported */
+#define SCI_SR(x)		BIT((x) - 1)
+
+void sci_release_port(struct uart_port *port);
+int sci_request_port(struct uart_port *port);
+void sci_config_port(struct uart_port *port, int flags);
+int sci_verify_port(struct uart_port *port, struct serial_struct *ser);
+void sci_pm(struct uart_port *port, unsigned int state,
+		   unsigned int oldstate);
+void sci_enable_ms(struct uart_port *port);
+
+#ifdef CONFIG_CONSOLE_POLL
+int sci_poll_get_char(struct uart_port *port);
+void sci_poll_put_char(struct uart_port *port, unsigned char c);
+#endif /* CONFIG_CONSOLE_POLL */
+
+struct plat_sci_reg {
+	u8 offset;
+	u8 size;
+};
+
+/* The actual number of needed registers depends on the sci controller;
+ * using this value as a max covers both sci and rsci cases
+ */
+#define SCI_NR_REGS 20
+
+struct sci_port_params_bits {
+	unsigned int rxtx_enable;
+	unsigned int te_clear;
+	unsigned int poll_sent_bits;
+};
+
+struct sci_common_regs {
+	unsigned int status;
+	unsigned int control;
+};
+
+struct sci_port_params {
+	const struct plat_sci_reg regs[SCI_NR_REGS];
+	const struct sci_common_regs *common_regs;
+	const struct sci_port_params_bits *param_bits;
+	unsigned int fifosize;
+	unsigned int overrun_reg;
+	unsigned int overrun_mask;
+	unsigned int sampling_rate_mask;
+	unsigned int error_mask;
+	unsigned int error_clear;
+};
+
+struct sci_port_ops {
+	u32 (*read_reg)(struct uart_port *port, int reg);
+	void (*write_reg)(struct uart_port *port, int reg, int value);
+	void (*clear_SCxSR)(struct uart_port *port, unsigned int mask);
+
+	void (*transmit_chars)(struct uart_port *port);
+	void (*receive_chars)(struct uart_port *port);
+
+	void (*poll_put_char)(struct uart_port *port, unsigned char c);
+
+	int (*set_rtrg)(struct uart_port *port, int rx_trig);
+	int (*rtrg_enabled)(struct uart_port *port);
+
+	void (*shutdown_complete)(struct uart_port *port);
+
+	void (*prepare_console_write)(struct uart_port *port, u32 ctrl);
+};
+
+struct sci_port {
+	struct uart_port	port;
+
+	/* Platform configuration */
+	const struct sci_port_params *params;
+	const struct plat_sci_port *cfg;
+
+	unsigned int		sampling_rate_mask;
+	resource_size_t		reg_size;
+	struct mctrl_gpios	*gpios;
+
+	/* Clocks */
+	struct clk		*clks[SCI_NUM_CLKS];
+	unsigned long		clk_rates[SCI_NUM_CLKS];
+
+	int			irqs[SCIx_NR_IRQS];
+	char			*irqstr[SCIx_NR_IRQS];
+
+	struct dma_chan			*chan_tx;
+	struct dma_chan			*chan_rx;
+
+#ifdef CONFIG_SERIAL_SH_SCI_DMA
+	struct dma_chan			*chan_tx_saved;
+	struct dma_chan			*chan_rx_saved;
+	dma_cookie_t			cookie_tx;
+	dma_cookie_t			cookie_rx[2];
+	dma_cookie_t			active_rx;
+	dma_addr_t			tx_dma_addr;
+	unsigned int			tx_dma_len;
+	struct scatterlist		sg_rx[2];
+	void				*rx_buf[2];
+	size_t				buf_len_rx;
+	struct work_struct		work_tx;
+	struct hrtimer			rx_timer;
+	unsigned int			rx_timeout;	/* microseconds */
+#endif
+	unsigned int			rx_frame;
+	int				rx_trigger;
+	struct timer_list		rx_fifo_timer;
+	int				rx_fifo_timeout;
+	u16				hscif_tot;
+
+	const struct sci_port_ops *ops;
+
+	bool has_rtscts;
+	bool autorts;
+	bool tx_occurred;
+};
+
+#define to_sci_port(uart) container_of((uart), struct sci_port, port)
+
+int sci_scbrr_calc(struct sci_port *s, unsigned int bps,
+			  unsigned int *brr, unsigned int *srr,
+			  unsigned int *cks);
+
+void sci_port_disable(struct sci_port *sci_port);
+void sci_port_enable(struct sci_port *sci_port);
+
+int sci_startup(struct uart_port *port);
+void sci_free_irq(struct sci_port *port);
+
+void sci_request_dma(struct uart_port *port);
+void sci_free_dma(struct uart_port *port);
+void sci_flush_buffer(struct uart_port *port);
+
+#define min_sr(_port)		ffs((_port)->sampling_rate_mask)
+#define max_sr(_port)		fls((_port)->sampling_rate_mask)
+
+#ifdef CONFIG_SERIAL_SH_SCI_EARLYCON
+int __init early_console_setup(struct earlycon_device *device, int);
+#endif
+
+#endif /* __SH_SCI_COMMON_H__ */
-- 
2.43.0

Re: [PATCH v2 08/13] serial: sh-sci: Introduced function pointers

[Geert Uytterhoeven]

Hi Thierry,

On Mon, 17 Feb 2025 at 11:56, Thierry Bultel
<thierry.bultel.yh@bp.renesas.com> wrote:
> The aim here is to prepare support for new sci controllers like
> the T2H/RSCI whose registers are too much different for being
> handled in common code.
>
> This named serial controller also has 32 bits register,
> so some return types had to be changed.
>
> The needed generic functions are no longer static, with prototypes
> defined in sh-sci-common.h so that they can be used from specific
> implementation in a separate file, to keep this driver as little
> changed as possible.
>
> For doing so, a set of 'ops' is added to struct sci_port.
>
> Signed-off-by: Thierry Bultel <thierry.bultel.yh@bp.renesas.com>

Thanks for your patch!

Please rebase this on top of commit 22a6984c5b5df8ea ("serial: sh-sci:
Update the suspend/resume support") in tty-next (next-20250217 and
later).

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

Re: [PATCH v2 08/13] serial: sh-sci: Introduced function pointers

[Geert Uytterhoeven]

Hi Thierry,

Thanks for your patch!

On Mon, 17 Feb 2025 at 11:56, Thierry Bultel
<thierry.bultel.yh@bp.renesas.com> wrote:
> The aim here is to prepare support for new sci controllers like
> the T2H/RSCI whose registers are too much different for being
> handled in common code.
>
> This named serial controller also has 32 bits register,
> so some return types had to be changed.
>
> The needed generic functions are no longer static, with prototypes
> defined in sh-sci-common.h so that they can be used from specific

I more like this name than the actual file name "sh-sci_common.h" ;-)

> implementation in a separate file, to keep this driver as little
> changed as possible.
>
> For doing so, a set of 'ops' is added to struct sci_port.
>
> Signed-off-by: Thierry Bultel <thierry.bultel.yh@bp.renesas.com>

I did a rather thorough review while investigating why this patch
broke SuperH...

> --- a/drivers/tty/serial/sh-sci.c
> +++ b/drivers/tty/serial/sh-sci.c
> @@ -76,101 +64,39 @@ enum {
>         ((port)->irqs[SCIx_ERI_IRQ] &&  \
>          ((port)->irqs[SCIx_RXI_IRQ] < 0))
>
> -enum SCI_CLKS {
> -       SCI_FCK,                /* Functional Clock */
> -       SCI_SCK,                /* Optional External Clock */
> -       SCI_BRG_INT,            /* Optional BRG Internal Clock Source */
> -       SCI_SCIF_CLK,           /* Optional BRG External Clock Source */
> -       SCI_NUM_CLKS
> -};
> -
> -/* Bit x set means sampling rate x + 1 is supported */
> -#define SCI_SR(x)              BIT((x) - 1)
>  #define SCI_SR_RANGE(x, y)     GENMASK((y) - 1, (x) - 1)
>
>  #define SCI_SR_SCIFAB          SCI_SR(5) | SCI_SR(7) | SCI_SR(11) | \
>                                 SCI_SR(13) | SCI_SR(16) | SCI_SR(17) | \
>                                 SCI_SR(19) | SCI_SR(27)
>
> -#define min_sr(_port)          ffs((_port)->sampling_rate_mask)
> -#define max_sr(_port)          fls((_port)->sampling_rate_mask)
> -
>  /* Iterate over all supported sampling rates, from high to low */
>  #define for_each_sr(_sr, _port)                                                \
>         for ((_sr) = max_sr(_port); (_sr) >= min_sr(_port); (_sr)--)    \
>                 if ((_port)->sampling_rate_mask & SCI_SR((_sr)))
>
> -struct plat_sci_reg {
> -       u8 offset, size;
> -};
> -
> -struct sci_port_params {
> -       const struct plat_sci_reg regs[SCIx_NR_REGS];

This was the sole user of SCIx_NR_REGS, so the latter can be removed.

> -       unsigned int fifosize;
> -       unsigned int overrun_reg;
> -       unsigned int overrun_mask;
> -       unsigned int sampling_rate_mask;
> -       unsigned int error_mask;
> -       unsigned int error_clear;
> -};
> -
> -struct sci_port {
> -       struct uart_port        port;
> -
> -       /* Platform configuration */
> -       const struct sci_port_params *params;
> -       const struct plat_sci_port *cfg;
> -       unsigned int            sampling_rate_mask;
> -       resource_size_t         reg_size;
> -       struct mctrl_gpios      *gpios;
> -
> -       /* Clocks */
> -       struct clk              *clks[SCI_NUM_CLKS];
> -       unsigned long           clk_rates[SCI_NUM_CLKS];
> -
> -       int                     irqs[SCIx_NR_IRQS];
> -       char                    *irqstr[SCIx_NR_IRQS];
> -
> -       struct dma_chan                 *chan_tx;
> -       struct dma_chan                 *chan_rx;
> -
> -#ifdef CONFIG_SERIAL_SH_SCI_DMA
> -       struct dma_chan                 *chan_tx_saved;
> -       struct dma_chan                 *chan_rx_saved;
> -       dma_cookie_t                    cookie_tx;
> -       dma_cookie_t                    cookie_rx[2];
> -       dma_cookie_t                    active_rx;
> -       dma_addr_t                      tx_dma_addr;
> -       unsigned int                    tx_dma_len;
> -       struct scatterlist              sg_rx[2];
> -       void                            *rx_buf[2];
> -       size_t                          buf_len_rx;
> -       struct work_struct              work_tx;
> -       struct hrtimer                  rx_timer;
> -       unsigned int                    rx_timeout;     /* microseconds */
> -#endif
> -       unsigned int                    rx_frame;
> -       int                             rx_trigger;
> -       struct timer_list               rx_fifo_timer;
> -       int                             rx_fifo_timeout;
> -       u16                             hscif_tot;
> -
> -       bool has_rtscts;
> -       bool autorts;
> -       bool tx_occurred;
> -};
> -
>  #define SCI_NPORTS CONFIG_SERIAL_SH_SCI_NR_UARTS
>
>  static struct sci_port sci_ports[SCI_NPORTS];
>  static unsigned long sci_ports_in_use;
>  static struct uart_driver sci_uart_driver;
>
> -static inline struct sci_port *
> -to_sci_port(struct uart_port *uart)
> -{
> -       return container_of(uart, struct sci_port, port);
> -}
> +static const struct sci_port_params_bits sci_sci_port_params_bits = {
> +       .rxtx_enable = SCSCR_RE | SCSCR_TE,
> +       .te_clear = SCSCR_TE | SCSCR_TEIE,
> +       .poll_sent_bits = SCI_FER | SCI_TEND

s/SCI_FER/SCI_TDRE/

Cfr.

#define SCxSR_TDxE(port)    (((port)->type == PORT_SCI) ? SCI_TDRE   :
SCIF_TDFE)

> +};
> +
> +static const struct sci_port_params_bits sci_scix_port_params_bits = {

I'd rather call this sci_scif_port_params_bits, as it is used by all
SCIF variants (IRDA is sort-of SH3 SCIF).

> +       .rxtx_enable = SCSCR_RE | SCSCR_TE,
> +       .te_clear = SCSCR_TE | SCSCR_TEIE,
> +       .poll_sent_bits = SCIF_TDFE | SCIF_TEND
> +};
> +
> +static const struct sci_common_regs sci_common_regs = {
> +       .status = SCxSR,
> +       .control = SCSCR,
> +};
>
>  static const struct sci_port_params sci_port_params[SCIx_NR_REGTYPES] = {
>         /*

> @@ -713,15 +667,16 @@ static void sci_clear_SCxSR(struct uart_port *port, unsigned int mask)
>      defined(CONFIG_SERIAL_SH_SCI_EARLYCON)
>
>  #ifdef CONFIG_CONSOLE_POLL
> -static int sci_poll_get_char(struct uart_port *port)
> +int sci_poll_get_char(struct uart_port *port)

As rzsci.c does not call this, I think it can stay static...

>  {
>         unsigned short status;
> +       struct sci_port *s = to_sci_port(port);
>         int c;
>
>         do {
>                 status = sci_serial_in(port, SCxSR);
>                 if (status & SCxSR_ERRORS(port)) {
> -                       sci_clear_SCxSR(port, SCxSR_ERROR_CLEAR(port));
> +                       s->ops->clear_SCxSR(port, SCxSR_ERROR_CLEAR(port));
>                         continue;
>                 }
>                 break;

> @@ -1623,7 +1582,7 @@ static struct dma_chan *sci_request_dma_chan(struct uart_port *port,
>         return chan;
>  }
>
> -static void sci_request_dma(struct uart_port *port)
> +void sci_request_dma(struct uart_port *port)

Likewise.

>  {
>         struct sci_port *s = to_sci_port(port);
>         struct tty_port *tport = &port->state->port;
> @@ -1711,7 +1670,7 @@ static void sci_request_dma(struct uart_port *port)
>         }
>  }
>
> -static void sci_free_dma(struct uart_port *port)
> +void sci_free_dma(struct uart_port *port)

Likewise

>  {
>         struct sci_port *s = to_sci_port(port);
>
> @@ -1721,7 +1680,7 @@ static void sci_free_dma(struct uart_port *port)
>                 sci_dma_rx_release(s);
>  }
>
> -static void sci_flush_buffer(struct uart_port *port)
> +void sci_flush_buffer(struct uart_port *port)

Not need if rzsci.c does not use DMA yet.

>  {
>         struct sci_port *s = to_sci_port(port);
>
> @@ -1750,11 +1709,11 @@ static void sci_dma_check_tx_occurred(struct sci_port *s)
>                 s->tx_occurred = true;
>  }
>  #else /* !CONFIG_SERIAL_SH_SCI_DMA */
> -static inline void sci_request_dma(struct uart_port *port)
> +inline void sci_request_dma(struct uart_port *port)

Non-static inline?

>  {
>  }
>
> -static inline void sci_free_dma(struct uart_port *port)
> +inline void sci_free_dma(struct uart_port *port)

Likewise

>  {
>  }
>
> @@ -1762,7 +1721,9 @@ static void sci_dma_check_tx_occurred(struct sci_port *s)
>  {
>  }
>
> -#define sci_flush_buffer       NULL
> +inline void sci_flush_buffer(struct uart_port *port)

Why?

> +{
> +}
>  #endif /* !CONFIG_SERIAL_SH_SCI_DMA */
>
>  static irqreturn_t sci_rx_interrupt(int irq, void *ptr)

> @@ -1837,16 +1799,19 @@ static irqreturn_t sci_tx_interrupt(int irq, void *ptr)
>  static irqreturn_t sci_tx_end_interrupt(int irq, void *ptr)
>  {
>         struct uart_port *port = ptr;
> +       struct sci_port *s = to_sci_port(port);
> +       const struct sci_common_regs *regs = s->params->common_regs;
>         unsigned long flags;
> -       unsigned short ctrl;
> +       u32 ctrl;
>
>         if (port->type != PORT_SCI)
>                 return sci_tx_interrupt(irq, ptr);
>
>         uart_port_lock_irqsave(port, &flags);
> -       ctrl = sci_serial_in(port, SCSCR);
> -       ctrl &= ~(SCSCR_TE | SCSCR_TEIE);
> -       sci_serial_out(port, SCSCR, ctrl);
> +       ctrl = s->ops->read_reg(port, regs->control);
> +
> +       ctrl &= ~(s->params->param_bits->te_clear);

As you only ever use ~te_clear, please move the ~ to the initialization.

> +       s->ops->write_reg(port, regs->control, ctrl);
>         uart_port_unlock_irqrestore(port, flags);
>
>         return IRQ_HANDLED;

> @@ -2059,7 +2025,7 @@ static int sci_request_irq(struct sci_port *port)
>         return ret;
>  }
>
> -static void sci_free_irq(struct sci_port *port)
> +void sci_free_irq(struct sci_port *port)

As rzsci.c does not call this, I think it can stay static...

>  {
>         int i, j;
>
> @@ -2232,7 +2198,7 @@ static unsigned int sci_get_mctrl(struct uart_port *port)
>         return mctrl;
>  }
>
> -static void sci_enable_ms(struct uart_port *port)
> +void sci_enable_ms(struct uart_port *port)

Likewise

>  {
>         mctrl_gpio_enable_ms(to_sci_port(port)->gpios);
>  }

> @@ -2383,9 +2352,9 @@ static int sci_brg_calc(struct sci_port *s, unsigned int bps,
>  }
>
>  /* calculate sample rate, BRR, and clock select */
> -static int sci_scbrr_calc(struct sci_port *s, unsigned int bps,
> -                         unsigned int *brr, unsigned int *srr,
> -                         unsigned int *cks)
> +int sci_scbrr_calc(struct sci_port *s, unsigned int bps,

Likewise.

> +                  unsigned int *brr, unsigned int *srr,
> +                  unsigned int *cks)
>  {
>         unsigned long freq = s->clk_rates[SCI_FCK];
>         unsigned int sr, br, prediv, scrate, c;

> @@ -2881,6 +2861,19 @@ static const struct uart_ops sci_uart_ops = {
>  #endif
>  };
>
> +static const struct sci_port_ops sci_port_ops = {
> +       .read_reg               = sci_serial_in,
> +       .write_reg              = sci_serial_out,
> +       .receive_chars          = sci_receive_chars,
> +       .transmit_chars         = sci_transmit_chars,
> +       .poll_put_char          = sci_poll_put_char,
> +       .clear_SCxSR            = sci_clear_SCxSR,
> +       .set_rtrg               = scif_set_rtrg,
> +       .rtrg_enabled           = scif_rtrg_enabled,
> +       .shutdown_complete      = sci_shutdown_complete,
> +       .prepare_console_write  = sci_prepare_console_write,
> +};

Please initialize all members in the same order as in the structure's
definition in the header file.

> +
>  static int sci_init_clocks(struct sci_port *sci_port, struct device *dev)
>  {
>         const char *clk_names[] = {

> @@ -3119,21 +3115,21 @@ static void serial_console_write(struct console *co, const char *s,
>                 uart_port_lock_irqsave(port, &flags);
>
>         /* first save SCSCR then disable interrupts, keep clock source */
> -       ctrl = sci_serial_in(port, SCSCR);
> -       ctrl_temp = SCSCR_RE | SCSCR_TE |
> -                   (sci_port->cfg->scscr & ~(SCSCR_CKE1 | SCSCR_CKE0)) |
> -                   (ctrl & (SCSCR_CKE1 | SCSCR_CKE0));
> -       sci_serial_out(port, SCSCR, ctrl_temp | sci_port->hscif_tot);
> +
> +       ctrl = sci_port->ops->read_reg(port, regs->control);
> +       sci_port->ops->prepare_console_write(port, ctrl);
>
>         uart_console_write(port, s, count, serial_console_putchar);
>
>         /* wait until fifo is empty and last bit has been transmitted */
> -       bits = SCxSR_TDxE(port) | SCxSR_TEND(port);
> -       while ((sci_serial_in(port, SCxSR) & bits) != bits)
> +
> +       bits = sci_ports->params->param_bits->poll_sent_bits;

s/sci_ports/sci_port/

Else it crashes on e.g. RTS7751R2D (qemu-system-sh4 -M r2d) and Landisk,
where the serial console is ttySC1.

> +
> +       while ((sci_port->ops->read_reg(port, regs->status) & bits) != bits)
>                 cpu_relax();
>
>         /* restore the SCSCR */
> -       sci_serial_out(port, SCSCR, ctrl);
> +       sci_port->ops->write_reg(port, regs->control, ctrl);
>
>         if (locked)
>                 uart_port_unlock_irqrestore(port, flags);

> @@ -3564,9 +3559,11 @@ sh_early_platform_init_buffer("earlyprintk", &sci_driver,
>  #ifdef CONFIG_SERIAL_SH_SCI_EARLYCON
>  static struct plat_sci_port port_cfg __initdata;
>
> -static int __init early_console_setup(struct earlycon_device *device,
> +int __init early_console_setup(struct earlycon_device *device,

The name of this function is too generic to make it global.

>                                       int type)
>  {
> +       const struct sci_common_regs *regs;
> +
>         if (!device->port.membase)
>                 return -ENODEV;
>

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

[PATCH v2 09/13] serial: sh-sci: Introduced sci_of_data

[Thierry Bultel]

The aim here is to provide an easier support to more different SCI
controllers, like the RZ/T2H one.

The existing .data field of_sci_match is changed to a structure containing
all what that can be statically initialized, and avoid a call to
'sci_probe_regmap', in both 'sci_init_single', and 'early_console_setup'.

'sci_probe_regmap' is now assumed to be called in the only case where the
device description is from a board file instead of a dts.

In this way, there is no need to patch 'sci_probe_regmap' for adding new
SCI type, and also, the specific sci_port_params for a new SCI type can be
provided by an external file.

Signed-off-by: Thierry Bultel <thierry.bultel.yh@bp.renesas.com>
---
 drivers/tty/serial/sh-sci.c        | 60 ++++++++++++++++++------------
 drivers/tty/serial/sh-sci_common.h | 11 +++++-
 2 files changed, 46 insertions(+), 25 deletions(-)

diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index ace56375c044..eee1c03ba5a7 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -2917,10 +2917,13 @@ static int sci_init_clocks(struct sci_port *sci_port, struct device *dev)
 }
 
 static const struct sci_port_params *
-sci_probe_regmap(const struct plat_sci_port *cfg)
+sci_probe_regmap(const struct plat_sci_port *cfg, struct sci_port *sci_port)
 {
 	unsigned int regtype;
 
+	sci_port->ops = &sci_port_ops;
+	sci_port->port.ops = &sci_uart_ops;
+
 	if (cfg->regtype != SCIx_PROBE_REGTYPE)
 		return &sci_port_params[cfg->regtype];
 
@@ -2967,9 +2970,7 @@ static int sci_init_single(struct platform_device *dev,
 	int ret;
 
 	sci_port->cfg	= p;
-	sci_port->ops	= &sci_port_ops;
 
-	port->ops	= &sci_uart_ops;
 	port->iotype	= UPIO_MEM;
 	port->line	= index;
 	port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_SH_SCI_CONSOLE);
@@ -3009,7 +3010,6 @@ static int sci_init_single(struct platform_device *dev,
 		for (i = 1; i < ARRAY_SIZE(sci_port->irqs); i++)
 			sci_port->irqs[i] = sci_port->irqs[0];
 
-	sci_port->params = sci_probe_regmap(p);
 	if (unlikely(sci_port->params == NULL))
 		return -EINVAL;
 
@@ -3264,9 +3264,14 @@ static void sci_remove(struct platform_device *dev)
 		device_remove_file(&dev->dev, &dev_attr_rx_fifo_timeout);
 }
 
-#define SCI_OF_DATA(type, regtype)	(void *)((type) << 16 | (regtype))
-#define SCI_OF_TYPE(data)		((unsigned long)(data) >> 16)
-#define SCI_OF_REGTYPE(data)		((unsigned long)(data) & 0xffff)
+#define SCI_OF_DATA(_type, _regtype) (\
+&(struct sci_of_data) {\
+	.type = (_type), \
+	.regtype = (_regtype),\
+	.ops = &sci_port_ops,\
+	.uart_ops = &sci_uart_ops,\
+	.params = &sci_port_params[_regtype],\
+})
 
 static const struct of_device_id of_sci_match[] __maybe_unused = {
 	/* SoC-specific types */
@@ -3334,7 +3339,7 @@ static struct plat_sci_port *sci_parse_dt(struct platform_device *pdev,
 	struct reset_control *rstc;
 	struct plat_sci_port *p;
 	struct sci_port *sp;
-	const void *data;
+	const struct sci_of_data *data;
 	int id, ret;
 
 	if (!IS_ENABLED(CONFIG_OF) || !np)
@@ -3380,8 +3385,12 @@ static struct plat_sci_port *sci_parse_dt(struct platform_device *pdev,
 	sp = &sci_ports[id];
 	*dev_id = id;
 
-	p->type = SCI_OF_TYPE(data);
-	p->regtype = SCI_OF_REGTYPE(data);
+	p->type = data->type;
+	p->regtype = data->regtype;
+
+	sp->ops = data->ops;
+	sp->port.ops = data->uart_ops;
+	sp->params = data->params;
 
 	sp->has_rtscts = of_property_read_bool(np, "uart-has-rtscts");
 
@@ -3471,6 +3480,7 @@ static int sci_probe(struct platform_device *dev)
 		}
 
 		dev_id = dev->id;
+		sp->params = sci_probe_regmap(p, &sci_ports[dev_id]);
 	}
 
 	sp = &sci_ports[dev_id];
@@ -3560,19 +3570,23 @@ sh_early_platform_init_buffer("earlyprintk", &sci_driver,
 static struct plat_sci_port port_cfg __initdata;
 
 int __init early_console_setup(struct earlycon_device *device,
-				      int type)
+			       const struct sci_of_data *data)
 {
 	const struct sci_common_regs *regs;
 
 	if (!device->port.membase)
 		return -ENODEV;
 
-	device->port.type = type;
+	device->port.type = data->type;
 	memcpy(&sci_ports[0].port, &device->port, sizeof(struct uart_port));
-	port_cfg.type = type;
+
+	port_cfg.type = data->type;
+	port_cfg.regtype = data->regtype;
+
 	sci_ports[0].cfg = &port_cfg;
-	sci_ports[0].ops = &sci_port_ops;
-	sci_ports[0].params = sci_probe_regmap(&port_cfg);
+	sci_ports[0].params = data->params;
+	sci_ports[0].ops = data->ops;
+	sci_ports[0].port.ops = data->uart_ops;
 	regs = sci_ports[0].params->common_regs;
 
 	port_cfg.scscr = sci_ports[0].ops->read_reg(&sci_ports[0].port, regs->control);
@@ -3586,41 +3600,39 @@ int __init early_console_setup(struct earlycon_device *device,
 static int __init sci_early_console_setup(struct earlycon_device *device,
 					  const char *opt)
 {
-	return early_console_setup(device, PORT_SCI);
+	return early_console_setup(device, SCI_OF_DATA(PORT_SCI, SCIx_SCI_REGTYPE));
 }
 static int __init scif_early_console_setup(struct earlycon_device *device,
 					  const char *opt)
 {
-	return early_console_setup(device, PORT_SCIF);
+	return early_console_setup(device, SCI_OF_DATA(PORT_SCIF, SCIx_SH4_SCIF_REGTYPE));
 }
 static int __init rzscifa_early_console_setup(struct earlycon_device *device,
 					  const char *opt)
 {
-	port_cfg.regtype = SCIx_RZ_SCIFA_REGTYPE;
-	return early_console_setup(device, PORT_SCIF);
+	return early_console_setup(device, SCI_OF_DATA(PORT_SCIF, SCIx_RZ_SCIFA_REGTYPE));
 }
 
 static int __init rzv2hscif_early_console_setup(struct earlycon_device *device,
 						const char *opt)
 {
-	port_cfg.regtype = SCIx_RZV2H_SCIF_REGTYPE;
-	return early_console_setup(device, PORT_SCIF);
+	return early_console_setup(device, SCI_OF_DATA(PORT_SCIF, SCIx_RZV2H_SCIF_REGTYPE));
 }
 
 static int __init scifa_early_console_setup(struct earlycon_device *device,
 					  const char *opt)
 {
-	return early_console_setup(device, PORT_SCIFA);
+	return early_console_setup(device, SCI_OF_DATA(PORT_SCIFA, SCIx_SCIFA_REGTYPE));
 }
 static int __init scifb_early_console_setup(struct earlycon_device *device,
 					  const char *opt)
 {
-	return early_console_setup(device, PORT_SCIFB);
+	return early_console_setup(device, SCI_OF_DATA(PORT_SCIFB, SCIx_SCIFB_REGTYPE));
 }
 static int __init hscif_early_console_setup(struct earlycon_device *device,
 					  const char *opt)
 {
-	return early_console_setup(device, PORT_HSCIF);
+	return early_console_setup(device, SCI_OF_DATA(PORT_HSCIF, SCIx_HSCIF_REGTYPE));
 }
 
 OF_EARLYCON_DECLARE(sci, "renesas,sci", sci_early_console_setup);
diff --git a/drivers/tty/serial/sh-sci_common.h b/drivers/tty/serial/sh-sci_common.h
index 0bc49ab277b5..9235a8d4c7aa 100644
--- a/drivers/tty/serial/sh-sci_common.h
+++ b/drivers/tty/serial/sh-sci_common.h
@@ -96,6 +96,14 @@ struct sci_port_ops {
 	void (*prepare_console_write)(struct uart_port *port, u32 ctrl);
 };
 
+struct sci_of_data {
+	const struct sci_port_params *params;
+	const struct uart_ops *uart_ops;
+	const struct sci_port_ops *ops;
+	unsigned short regtype;
+	unsigned short type;
+};
+
 struct sci_port {
 	struct uart_port	port;
 
@@ -165,7 +173,8 @@ void sci_flush_buffer(struct uart_port *port);
 #define max_sr(_port)		fls((_port)->sampling_rate_mask)
 
 #ifdef CONFIG_SERIAL_SH_SCI_EARLYCON
-int __init early_console_setup(struct earlycon_device *device, int);
+int __init early_console_setup(struct earlycon_device *device,
+			       const struct sci_of_data *data);
 #endif
 
 #endif /* __SH_SCI_COMMON_H__ */
-- 
2.43.0

Re: [PATCH v2 09/13] serial: sh-sci: Introduced sci_of_data

[Geert Uytterhoeven]

Hi Thierry,

On Mon, 17 Feb 2025 at 12:04, Thierry Bultel
<thierry.bultel.yh@bp.renesas.com> wrote:
> The aim here is to provide an easier support to more different SCI
> controllers, like the RZ/T2H one.
>
> The existing .data field of_sci_match is changed to a structure containing
> all what that can be statically initialized, and avoid a call to
> 'sci_probe_regmap', in both 'sci_init_single', and 'early_console_setup'.
>
> 'sci_probe_regmap' is now assumed to be called in the only case where the
> device description is from a board file instead of a dts.
>
> In this way, there is no need to patch 'sci_probe_regmap' for adding new
> SCI type, and also, the specific sci_port_params for a new SCI type can be
> provided by an external file.
>
> Signed-off-by: Thierry Bultel <thierry.bultel.yh@bp.renesas.com>

Thanks for your patch!

Please rebase this on top of commit c1117a2fefbcce30 ("serial: sh-sci:
Use plain struct copy in early_console_setup()") in v6.14-rc1, so
it applies.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

Re: [PATCH v2 09/13] serial: sh-sci: Introduced sci_of_data

[Geert Uytterhoeven]

Hi Thierry,

On Mon, 17 Feb 2025 at 12:04, Thierry Bultel
<thierry.bultel.yh@bp.renesas.com> wrote:
> The aim here is to provide an easier support to more different SCI
> controllers, like the RZ/T2H one.
>
> The existing .data field of_sci_match is changed to a structure containing
> all what that can be statically initialized, and avoid a call to
> 'sci_probe_regmap', in both 'sci_init_single', and 'early_console_setup'.
>
> 'sci_probe_regmap' is now assumed to be called in the only case where the
> device description is from a board file instead of a dts.
>
> In this way, there is no need to patch 'sci_probe_regmap' for adding new
> SCI type, and also, the specific sci_port_params for a new SCI type can be
> provided by an external file.
>
> Signed-off-by: Thierry Bultel <thierry.bultel.yh@bp.renesas.com>

Thanks for your patch!

> --- a/drivers/tty/serial/sh-sci.c
> +++ b/drivers/tty/serial/sh-sci.c
> @@ -3009,7 +3010,6 @@ static int sci_init_single(struct platform_device *dev,
>                 for (i = 1; i < ARRAY_SIZE(sci_port->irqs); i++)
>                         sci_port->irqs[i] = sci_port->irqs[0];
>
> -       sci_port->params = sci_probe_regmap(p);
>         if (unlikely(sci_port->params == NULL))
>                 return -EINVAL;

Ideally, this check can be removed here... (see below)

>
> @@ -3264,9 +3264,14 @@ static void sci_remove(struct platform_device *dev)
>                 device_remove_file(&dev->dev, &dev_attr_rx_fifo_timeout);
>  }
>
> -#define SCI_OF_DATA(type, regtype)     (void *)((type) << 16 | (regtype))
> -#define SCI_OF_TYPE(data)              ((unsigned long)(data) >> 16)
> -#define SCI_OF_REGTYPE(data)           ((unsigned long)(data) & 0xffff)
> +#define SCI_OF_DATA(_type, _regtype) (\
> +&(struct sci_of_data) {\
> +       .type = (_type), \
> +       .regtype = (_regtype),\
> +       .ops = &sci_port_ops,\
> +       .uart_ops = &sci_uart_ops,\
> +       .params = &sci_port_params[_regtype],\
> +})

Doing it this way means each and every entry in of_sci_match[] has its
own copy of struct sci_of_data, even if it is identical to one of the
others. Unfortunately s/struct sci_of_data/const struct sci_of_data/
doesn't help, so I'm afraid you have to deduplicate them explicitly.

>
>  static const struct of_device_id of_sci_match[] __maybe_unused = {
>         /* SoC-specific types */
> @@ -3334,7 +3339,7 @@ static struct plat_sci_port *sci_parse_dt(struct platform_device *pdev,
>         struct reset_control *rstc;
>         struct plat_sci_port *p;
>         struct sci_port *sp;
> -       const void *data;
> +       const struct sci_of_data *data;
>         int id, ret;
>
>         if (!IS_ENABLED(CONFIG_OF) || !np)
> @@ -3380,8 +3385,12 @@ static struct plat_sci_port *sci_parse_dt(struct platform_device *pdev,
>         sp = &sci_ports[id];
>         *dev_id = id;
>
> -       p->type = SCI_OF_TYPE(data);
> -       p->regtype = SCI_OF_REGTYPE(data);
> +       p->type = data->type;
> +       p->regtype = data->regtype;
> +
> +       sp->ops = data->ops;
> +       sp->port.ops = data->uart_ops;
> +       sp->params = data->params;
>
>         sp->has_rtscts = of_property_read_bool(np, "uart-has-rtscts");
>
> @@ -3471,6 +3480,7 @@ static int sci_probe(struct platform_device *dev)
>                 }
>
>                 dev_id = dev->id;
> +               sp->params = sci_probe_regmap(p, &sci_ports[dev_id]);

sp is still uninitialized here, so it crashes on SuperH.

In adition

if (!sp->params)
        return -ENODEV;

>         }
>
>         sp = &sci_ports[dev_id];
> @@ -3560,19 +3570,23 @@ sh_early_platform_init_buffer("earlyprintk", &sci_driver,
>  static struct plat_sci_port port_cfg __initdata;
>
>  int __init early_console_setup(struct earlycon_device *device,
> -                                     int type)
> +                              const struct sci_of_data *data)
>  {
>         const struct sci_common_regs *regs;
>
>         if (!device->port.membase)
>                 return -ENODEV;
>
> -       device->port.type = type;
> +       device->port.type = data->type;
>         memcpy(&sci_ports[0].port, &device->port, sizeof(struct uart_port));
> -       port_cfg.type = type;
> +
> +       port_cfg.type = data->type;
> +       port_cfg.regtype = data->regtype;
> +
>         sci_ports[0].cfg = &port_cfg;
> -       sci_ports[0].ops = &sci_port_ops;
> -       sci_ports[0].params = sci_probe_regmap(&port_cfg);
> +       sci_ports[0].params = data->params;
> +       sci_ports[0].ops = data->ops;
> +       sci_ports[0].port.ops = data->uart_ops;
>         regs = sci_ports[0].params->common_regs;
>
>         port_cfg.scscr = sci_ports[0].ops->read_reg(&sci_ports[0].port, regs->control);

I think you have to do some extra setup in sci_probe_earlyprintk(), too.
That function contains the second caller of sci_init_single(), and
thus relied on sci_init_single() calling sci_probe_regmap() before.
I haven't tested that case on actual hardware yet.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

[PATCH v2 10/13] serial: sh-sci: Add support for RZ/T2H SCI

[Thierry Bultel]

Define a new RZSCI port type, and the RSCI 32 bits registers set.
The RZ/T2H SCI has a a fifo, and a quite different set of registers
from the orginal SH SCI ones.
DMA is not supported yet.

Signed-off-by: Thierry Bultel <thierry.bultel.yh@bp.renesas.com>
---
 drivers/tty/serial/Kconfig       |   7 +
 drivers/tty/serial/Makefile      |   1 +
 drivers/tty/serial/rzsci.c       | 485 +++++++++++++++++++++++++++++++
 drivers/tty/serial/rzsci.h       |  12 +
 drivers/tty/serial/sh-sci.c      |  20 +-
 include/linux/serial_sci.h       |   3 +-
 include/uapi/linux/serial_core.h |   3 +
 7 files changed, 525 insertions(+), 6 deletions(-)
 create mode 100644 drivers/tty/serial/rzsci.c
 create mode 100644 drivers/tty/serial/rzsci.h

diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 45f0f779fbf9..d6326c39cfec 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -671,6 +671,13 @@ config SERIAL_SH_SCI_DMA
 	depends on SERIAL_SH_SCI && DMA_ENGINE
 	default ARCH_RENESAS
 
+config SERIAL_RZ_SCI
+	tristate "Support for Renesas RZ/T2H SCI variant"
+	depends on SERIAL_SH_SCI
+	help
+	  Support for the RZ/T2H SCI variant with fifo.
+	  Say Y if you want to be able to use the RZ/T2H SCI serial port.
+
 config SERIAL_HS_LPC32XX
 	tristate "LPC32XX high speed serial port support"
 	depends on ARCH_LPC32XX || COMPILE_TEST
diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile
index 6ff74f0a9530..537e0a0fc047 100644
--- a/drivers/tty/serial/Makefile
+++ b/drivers/tty/serial/Makefile
@@ -71,6 +71,7 @@ obj-$(CONFIG_SERIAL_QCOM_GENI)		+= qcom_geni_serial.o
 obj-$(CONFIG_SERIAL_QE)			+= ucc_uart.o
 obj-$(CONFIG_SERIAL_RDA)		+= rda-uart.o
 obj-$(CONFIG_SERIAL_RP2)		+= rp2.o
+obj-$(CONFIG_SERIAL_RZ_SCI)		+= rzsci.o
 obj-$(CONFIG_SERIAL_SA1100)		+= sa1100.o
 obj-$(CONFIG_SERIAL_SAMSUNG)		+= samsung_tty.o
 obj-$(CONFIG_SERIAL_SB1250_DUART)	+= sb1250-duart.o
diff --git a/drivers/tty/serial/rzsci.c b/drivers/tty/serial/rzsci.c
new file mode 100644
index 000000000000..8428c637a2e1
--- /dev/null
+++ b/drivers/tty/serial/rzsci.c
@@ -0,0 +1,485 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/bitops.h>
+#include <linux/io.h>
+#include <linux/serial_core.h>
+#include <linux/serial_sci.h>
+#include <linux/tty_flip.h>
+#include "rzsci.h"
+
+/* RSCI registers */
+#define RDR	0x00
+#define TDR	0x04
+#define CCR0	0x08
+#define CCR1	0x0C
+#define CCR2	0x10
+#define CCR3	0x14
+#define CCR4	0x18
+#define FCR	0x24
+#define DCR	0x30
+#define CSR	0x48
+#define FRSR	0x50
+#define FTSR	0x54
+#define CFCLR	0x68
+#define FFCLR	0x70
+
+/* RDR (Receive Data Register) */
+#define RDR_FFER               BIT(12) /* FIFO Framing Error */
+#define RDR_FPER               BIT(11) /* FIFO Parity Error */
+#define	RDR_RDAT_MSK		GENMASK(8, 0)
+
+/* TDR (Transmit Data Register) */
+#define TDR_MPBT		BIT(9)	/* Multiprocessor Transfer */
+#define TDR_TDAT_9BIT_LSHIFT	0
+#define TDR_TDAT_9BIT_VAL	0x1FF
+#define	TDR_TDAT_9BIT_MSK	(TDR_TDAT_9BIT_VAL << TDR_TDAT_9BIT_LSHIFT)
+
+/* CCR0 (Common Control Register 0) */
+#define CCR0_SSE		BIT(24)	/* SSn# Pin Function Enable */
+#define CCR0_TEIE		BIT(21)	/* Transmit End Interrupt Enable */
+#define CCR0_TIE		BIT(20)	/* Transmit Interrupt Enable */
+#define CCR0_RIE		BIT(16)	/* Receive Interrupt Enable */
+#define CCR0_IDSEL		BIT(10)	/* ID Frame Select */
+#define CCR0_DCME		BIT(9)	/* Data Compare Match Enable */
+#define CCR0_MPIE		BIT(8)	/* Multiprocessor Interrupt Enable */
+#define CCR0_TE			BIT(4)	/* Transmit Enable */
+#define CCR0_RE			BIT(0)	/* Receive Enable */
+
+/* CCR1 (Common Control Register 1) */
+#define CCR1_NFEN		BIT(28)	/* Digital Noise Filter Function */
+#define CCR1_SHARPS		BIT(20)	/* Half -duplex Communication Select */
+#define CCR1_SPLP		BIT(16)	/* Loopback Control */
+#define CCR1_RINV		BIT(13)	/* RxD invert */
+#define CCR1_TINV		BIT(12)	/* TxD invert */
+#define CCR1_PM			BIT(9)	/* Parity Mode */
+#define CCR1_PE			BIT(8)	/* Parity Enable */
+#define CCR1_SPB2IO		BIT(5)	/* Serial Port Break I/O */
+#define CCR1_SPB2DT		BIT(4)	/* Serial Port Break Data Select */
+#define CCR1_CTSPEN		BIT(1)	/* CTS External Pin Enable */
+#define CCR1_CTSE		BIT(0)	/* CTS Enable */
+
+/* CCR2 (Common Control Register 2) */
+#define	CCR2_INIT		0xFF000004
+#define CCR2_CKS_TCLK		(0)	/* TCLK clock */
+#define CCR2_CKS_TCLK_DIV4	BIT(20)	/* TCLK/4 clock */
+#define CCR2_CKS_TCLK_DIV16	BIT(21)	/* TCLK16 clock */
+#define CCR2_CKS_TCLK_DIV64	(BIT(21) | BIT(20))	/* TCLK/64 clock */
+#define CCR2_BRME		BIT(16)	/* Bitrate Modulation Enable */
+#define CCR2_ABCSE		BIT(6)	/* Asynchronous Mode Extended Base Clock Select */
+#define CCR2_ABCS		BIT(5)	/* Asynchronous Mode Base Clock Select */
+#define CCR2_BGDM		BIT(4)	/* Baud Rate Generator Double-Speed Mode Select */
+
+/* CCR3 (Common Control Register 3) */
+#define	CCR3_INIT		0x1283
+#define CCR3_BLK		BIT(29)	/* Block Transfer Mode */
+#define CCR3_GM			BIT(28)	/* GSM Mode */
+#define CCR3_CKE1		BIT(25)	/* Clock Enable 1 */
+#define CCR3_CKE0		BIT(24)	/* Clock Enable 0 */
+#define CCR3_DEN		BIT(21)	/* Driver Enabled */
+#define CCR3_FM			BIT(20)	/* FIFO Mode Select */
+#define CCR3_MP			BIT(19)	/* Multi-Processor Mode */
+#define CCR3_MOD_ASYNC		0	/* Asynchronous mode (Multi-processor mode) */
+#define CCR3_RXDESEL		BIT(15)	/* Asynchronous Start Bit Edge Detection Select */
+#define CCR3_STP		BIT(14)	/* Stop bit Length */
+#define CCR3_SINV		BIT(13)	/* Transmitted/Received Data Invert */
+#define CCR3_LSBF		BIT(12)	/* LSB First select */
+#define CCR3_CHR1		BIT(9)	/* Character Length */
+#define CCR3_CHR0		BIT(8)	/* Character Length */
+#define CCR3_BPEN		BIT(7)	/* Synchronizer Bypass Enable */
+#define CCR3_CPOL		BIT(1)	/* Clock Polarity Select */
+#define CCR3_CPHA		BIT(0)	/* Clock Phase Select */
+
+/* FCR (FIFO Control Register) */
+#define FCR_RFRST		BIT(23)	/* Receive FIFO Data Register Reset */
+#define FCR_TFRST		BIT(15)	/* Transmit FIFO Data Register Reset */
+#define FCR_DRES		BIT(0)	/* Incoming Data Ready Error Select */
+#define FCR_RTRG4_0		GENMASK(20, 16)
+#define FCR_TTRG		GENMASK(12, 8)
+
+/* CSR (Common Status Register) */
+#define CSR_RDRF		BIT(31)	/* Receive Data Full */
+#define CSR_TEND		BIT(30)	/* Transmit End Flag */
+#define CSR_TDRE		BIT(29)	/* Transmit Data Empty */
+#define CSR_FER			BIT(28)	/* Framing Error */
+#define CSR_PER			BIT(27)	/* Parity Error */
+#define CSR_MFF			BIT(26)	/* Mode Fault Error */
+#define CSR_ORER		BIT(24)	/* Overrun Error */
+#define CSR_DFER		BIT(18)	/* Data Compare Match Framing Error */
+#define CSR_DPER		BIT(17)	/* Data Compare Match Parity Error */
+#define CSR_DCMF		BIT(16)	/* Data Compare Match */
+#define CSR_RXDMON		BIT(15)	/* Serial Input Data Monitor */
+#define CSR_ERS			BIT(4)	/* Error Signal Status */
+
+#define SCxSR_ERRORS(port)	(to_sci_port(port)->params->error_mask)
+#define SCxSR_ERROR_CLEAR(port)	(to_sci_port(port)->params->error_clear)
+
+#define RSCI_DEFAULT_ERROR_MASK	(CSR_PER | CSR_FER)
+
+#define RSCI_RDxF_CLEAR		(CFCLR_RDRFC)
+#define RSCI_ERROR_CLEAR	(CFCLR_PERC | CFCLR_FERC)
+#define RSCI_TDxE_CLEAR		(CFCLR_TDREC)
+#define RSCI_BREAK_CLEAR	(CFCLR_PERC | CFCLR_FERC | CFCLR_ORERC)
+
+/* FRSR (FIFO Receive Status Register) */
+#define FRSR_R5_0		GENMASK(13, 8)	/* Receive FIFO Data Count */
+#define FRSR_DR			BIT(0)	/* Receive Data Ready */
+
+/* CFCLR (Common Flag CLear Register) */
+#define CFCLR_RDRFC		BIT(31)	/* RDRF Clear */
+#define CFCLR_TDREC		BIT(29)	/* TDRE Clear */
+#define CFCLR_FERC		BIT(28)	/* FER Clear */
+#define CFCLR_PERC		BIT(27)	/* PER Clear */
+#define CFCLR_MFFC		BIT(26)	/* MFF Clear */
+#define CFCLR_ORERC		BIT(24)	/* ORER Clear */
+#define CFCLR_DFERC		BIT(18)	/* DFER Clear */
+#define CFCLR_DPERC		BIT(17)	/* DPER Clear */
+#define CFCLR_DCMFC		BIT(16)	/* DCMF Clear */
+#define CFCLR_ERSC		BIT(4)	/* ERS Clear */
+#define CFCLR_CLRFLAG		(CFCLR_RDRFC | CFCLR_FERC | CFCLR_PERC | \
+				 CFCLR_MFFC | CFCLR_ORERC | CFCLR_DFERC | \
+				 CFCLR_DPERC | CFCLR_DCMFC | CFCLR_ERSC)
+
+/* FFCLR (FIFO Flag CLear Register) */
+#define FFCLR_DRC		BIT(0)	/* DR Clear */
+
+#define DCR_DEPOL		BIT(0)
+
+static u32 rzsci_serial_in(struct uart_port *p, int offset)
+{
+	return ioread32(p->membase + offset);
+}
+
+static void rzsci_serial_out(struct uart_port *p, int offset, int value)
+{
+	iowrite32(value, p->membase + offset);
+}
+
+static void rzsci_clear_DRxC(struct uart_port *port)
+{
+	rzsci_serial_out(port, CFCLR, CFCLR_RDRFC);
+	rzsci_serial_out(port, FFCLR, FFCLR_DRC);
+}
+
+static void rzsci_clear_SCxSR(struct uart_port *port, unsigned int mask)
+{
+	rzsci_serial_out(port, CFCLR, mask);
+}
+
+static void rzsci_start_rx(struct uart_port *port)
+{
+	unsigned int ctrl;
+
+	ctrl = rzsci_serial_in(port, CCR0);
+	ctrl |= CCR0_RIE;
+	rzsci_serial_out(port, CCR0, ctrl);
+}
+
+static void rzsci_set_termios(struct uart_port *port, struct ktermios *termios,
+			      const struct ktermios *old)
+{
+	struct sci_port *s = to_sci_port(port);
+	unsigned long flags;
+
+	/*
+	 * For now, only RX enabling is supported
+	 */
+
+	sci_port_enable(s);
+	uart_port_lock_irqsave(port, &flags);
+
+	if (termios->c_cflag & CREAD)
+		rzsci_start_rx(port);
+
+	uart_port_unlock_irqrestore(port, flags);
+	sci_port_disable(s);
+}
+
+static int rzsci_txfill(struct uart_port *port)
+{
+	return rzsci_serial_in(port, FTSR);
+}
+
+static int rzsci_rxfill(struct uart_port *port)
+{
+	u32 val = rzsci_serial_in(port, FRSR);
+
+	return FIELD_GET(FRSR_R5_0, val);
+}
+
+static unsigned int rzsci_tx_empty(struct uart_port *port)
+{
+	unsigned int status = rzsci_serial_in(port, CSR);
+	unsigned int in_tx_fifo = rzsci_txfill(port);
+
+	return (status & CSR_TEND) && !in_tx_fifo ? TIOCSER_TEMT : 0;
+}
+
+static void rzsci_set_mctrl(struct uart_port *port, unsigned int mctrl)
+{
+	/* Not supported yet */
+	return;
+}
+
+static unsigned int rzsci_get_mctrl(struct uart_port *port)
+{
+	/* Not supported yet */
+	return 0;
+}
+
+static void rzsci_clear_CFC(struct uart_port *port, unsigned int mask)
+{
+	rzsci_serial_out(port, CFCLR, mask);
+}
+
+static void rzsci_start_tx(struct uart_port *port)
+{
+	struct sci_port *sp = to_sci_port(port);
+	u32 ctrl;
+
+	if (sp->chan_tx)
+		return;
+
+	/*
+	 * TE (Transmit Enable) must be set after setting TIE
+	 * (Transmit Interrupt Enable) or in the same instruction
+	 * to start the transmit process.
+	 */
+	ctrl = rzsci_serial_in(port, CCR0);
+	ctrl |= CCR0_TIE | CCR0_TE;
+	rzsci_serial_out(port, CCR0, ctrl);
+}
+
+static void rzsci_stop_tx(struct uart_port *port)
+{
+	u32 ctrl;
+
+	ctrl = rzsci_serial_in(port, CCR0);
+	ctrl &= ~CCR0_TIE;
+	rzsci_serial_out(port, CCR0, ctrl);
+}
+
+static void rzsci_stop_rx(struct uart_port *port)
+{
+	u32 ctrl;
+
+	ctrl = rzsci_serial_in(port, CCR0);
+	ctrl &= ~CCR0_RIE;
+	rzsci_serial_out(port, CCR0, ctrl);
+}
+
+static int rzsci_txroom(struct uart_port *port)
+{
+	return port->fifosize - rzsci_txfill(port);
+}
+
+static void rzsci_transmit_chars(struct uart_port *port)
+{
+	struct tty_port *tport = &port->state->port;
+	unsigned int stopped = uart_tx_stopped(port);
+	u32 status, ctrl;
+	int count;
+
+	status = rzsci_serial_in(port, CSR);
+	if (!(status & CSR_TDRE)) {
+		ctrl = rzsci_serial_in(port, CCR0);
+		if (kfifo_is_empty(&tport->xmit_fifo))
+			ctrl &= ~CCR0_TIE;
+		else
+			ctrl |= CCR0_TIE;
+		rzsci_serial_out(port, CCR0, ctrl);
+		return;
+	}
+
+	count = rzsci_txroom(port);
+
+	do {
+		unsigned char c;
+
+		if (port->x_char) {
+			c = port->x_char;
+			port->x_char = 0;
+		} else if (stopped || !kfifo_get(&tport->xmit_fifo, &c)) {
+			break;
+		}
+
+		rzsci_clear_CFC(port, CFCLR_TDREC);
+		rzsci_serial_out(port, TDR, c);
+
+		port->icount.tx++;
+	} while (--count > 0);
+
+	if (kfifo_len(&tport->xmit_fifo) < WAKEUP_CHARS)
+		uart_write_wakeup(port);
+
+	if (kfifo_is_empty(&tport->xmit_fifo)) {
+		ctrl = rzsci_serial_in(port, CCR0);
+		ctrl &= ~CCR0_TIE;
+		ctrl |= CCR0_TEIE;
+		rzsci_serial_out(port, CCR0, ctrl);
+	}
+}
+
+static void rzsci_receive_chars(struct uart_port *port)
+{
+	struct tty_port *tport = &port->state->port;
+	u32 rdat, status, frsr_status = 0;
+	int i, count, copied = 0;
+	unsigned char flag;
+
+	status = rzsci_serial_in(port, CSR);
+	frsr_status = rzsci_serial_in(port, FRSR);
+
+	if (!(status & CSR_RDRF) && !(frsr_status & FRSR_DR))
+		return;
+
+	while (1) {
+		/* Don't copy more bytes than there is room for in the buffer */
+		count = tty_buffer_request_room(tport, rzsci_rxfill(port));
+
+		/* If for any reason we can't copy more data, we're done! */
+		if (count == 0)
+			break;
+
+		for (i = 0; i < count; i++) {
+			char c;
+
+			rdat = rzsci_serial_in(port, RDR);
+			/* 9-bits data is not supported yet */
+			c = rdat & RDR_RDAT_MSK;
+
+			if (uart_handle_sysrq_char(port, c)) {
+				count--;
+				i--;
+				continue;
+			}
+
+			/* Store data and status.
+			 * Non FIFO mode is not supported
+			 */
+			if (rdat & RDR_FFER) {
+				flag = TTY_FRAME;
+				port->icount.frame++;
+			} else if (rdat & RDR_FPER) {
+				flag = TTY_PARITY;
+				port->icount.parity++;
+			} else {
+				flag = TTY_NORMAL;
+			}
+
+			tty_insert_flip_char(tport, c, flag);
+		}
+
+		rzsci_serial_in(port, CSR); /* dummy read */
+		rzsci_clear_DRxC(port);
+
+		copied += count;
+		port->icount.rx += count;
+	}
+
+	if (copied) {
+		/* Tell the rest of the system the news. New characters! */
+		tty_flip_buffer_push(tport);
+	} else {
+		/* TTY buffers full; read from RX reg to prevent lockup */
+		rzsci_serial_in(port, RDR);
+		rzsci_serial_in(port, CSR); /* dummy read */
+		rzsci_clear_DRxC(port);
+	}
+}
+
+static void rzsci_poll_put_char(struct uart_port *port, unsigned char c)
+{
+	u32 status;
+
+	do {
+		status = rzsci_serial_in(port, CSR);
+	} while (!(status & CSR_TDRE));
+
+	rzsci_serial_out(port, TDR, c);
+	rzsci_clear_SCxSR(port, CFCLR_TDREC);
+}
+
+static void rzsci_prepare_console_write(struct uart_port *port, u32 ctrl)
+{
+	struct sci_port *s = to_sci_port(port);
+	u32 ctrl_temp =
+		s->params->param_bits->rxtx_enable |
+		CCR0_TIE |
+		s->hscif_tot;
+	rzsci_serial_out(port, CCR0, ctrl_temp);
+}
+
+static const char *rzsci_type(struct uart_port *port)
+{
+	return "rzsci";
+}
+
+static const struct sci_common_regs rzsci_common_regs = {
+	.status = CSR,
+	.control = CCR0,
+};
+
+static const struct sci_port_params_bits rzsci_port_param_bits = {
+	.rxtx_enable = CCR0_RE | CCR0_TE,
+	.te_clear = CCR0_TE | CCR0_TEIE,
+	.poll_sent_bits = CSR_TDRE | CSR_TEND,
+};
+
+static const struct sci_port_params rzsci_port_params = {
+	.fifosize = 16,
+	.overrun_reg = CSR,
+	.overrun_mask = CSR_ORER,
+	.sampling_rate_mask = SCI_SR(32),
+	.error_mask = RSCI_DEFAULT_ERROR_MASK,
+	.error_clear = RSCI_ERROR_CLEAR,
+	.param_bits = &rzsci_port_param_bits,
+	.common_regs = &rzsci_common_regs,
+};
+
+static const struct uart_ops rzt2_sci_uart_ops = {
+	.tx_empty	= rzsci_tx_empty,
+	.set_mctrl	= rzsci_set_mctrl,
+	.get_mctrl	= rzsci_get_mctrl,
+	.start_tx	= rzsci_start_tx,
+	.stop_tx	= rzsci_stop_tx,
+	.stop_rx	= rzsci_stop_rx,
+	.startup	= sci_startup,
+	.flush_buffer	= sci_flush_buffer,
+	.set_termios	= rzsci_set_termios,
+	.pm		= sci_pm,
+	.type		= rzsci_type,
+	.release_port	= sci_release_port,
+	.request_port	= sci_request_port,
+	.config_port	= sci_config_port,
+	.verify_port	= sci_verify_port,
+};
+
+static const struct sci_port_ops rzsci_port_ops = {
+	.read_reg		= rzsci_serial_in,
+	.write_reg		= rzsci_serial_out,
+	.clear_SCxSR		= rzsci_clear_SCxSR,
+	.transmit_chars		= rzsci_transmit_chars,
+	.receive_chars		= rzsci_receive_chars,
+	.poll_put_char		= rzsci_poll_put_char,
+	.prepare_console_write	= rzsci_prepare_console_write,
+};
+
+struct sci_of_data sci_r9a09g077_data = {
+	.type = PORT_RZSCI,
+	.regtype = SCIx_RZT2H_SCI_REGTYPE,
+	.ops = &rzsci_port_ops,
+	.uart_ops = &rzt2_sci_uart_ops,
+	.params = &rzsci_port_params,
+};
+
+#ifdef CONFIG_SERIAL_SH_SCI_EARLYCON
+
+static int __init rzt2hsci_early_console_setup(struct earlycon_device *device,
+						const char *opt)
+{
+	return early_console_setup(device, &sci_r9a09g077_data);
+}
+
+OF_EARLYCON_DECLARE(rzsci, "renesas,r9a09g077-sci", rzt2hsci_early_console_setup);
+
+#endif /* CONFIG_SERIAL_SH_SCI_EARLYCON */
diff --git a/drivers/tty/serial/rzsci.h b/drivers/tty/serial/rzsci.h
new file mode 100644
index 000000000000..2840b65e7010
--- /dev/null
+++ b/drivers/tty/serial/rzsci.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __RZT2_SCI_H__
+#define __RZT2_SCI_H__
+
+#include "sh-sci_common.h"
+
+#ifdef CONFIG_SERIAL_RZ_SCI
+extern struct sci_of_data sci_r9a09g077_data;
+#endif
+
+#endif /* __RZT2_SCI_H__ */
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index eee1c03ba5a7..15fa15d18084 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -54,6 +54,7 @@
 #include <asm/platform_early.h>
 #endif
 
+#include "rzsci.h"
 #include "serial_mctrl_gpio.h"
 #include "sh-sci.h"
 #include "sh-sci_common.h"
@@ -1804,7 +1805,7 @@ static irqreturn_t sci_tx_end_interrupt(int irq, void *ptr)
 	unsigned long flags;
 	u32 ctrl;
 
-	if (port->type != PORT_SCI)
+	if (port->type != PORT_SCI && port->type != PORT_RZSCI)
 		return sci_tx_interrupt(irq, ptr);
 
 	uart_port_lock_irqsave(port, &flags);
@@ -2990,10 +2991,10 @@ static int sci_init_single(struct platform_device *dev,
 	}
 
 	/*
-	 * The fourth interrupt on SCI port is transmit end interrupt, so
+	 * The fourth interrupt on SCI and RZSCI port is transmit end interrupt, so
 	 * shuffle the interrupts.
 	 */
-	if (p->type == PORT_SCI)
+	if (p->type == PORT_SCI || p->type == PORT_RZSCI)
 		swap(sci_port->irqs[SCIx_BRI_IRQ], sci_port->irqs[SCIx_TEI_IRQ]);
 
 	/* The SCI generates several interrupts. They can be muxed together or
@@ -3030,6 +3031,9 @@ static int sci_init_single(struct platform_device *dev,
 		else
 			sci_port->rx_trigger = 8;
 		break;
+	case PORT_RZSCI:
+		sci_port->rx_trigger = 15;
+		break;
 	default:
 		sci_port->rx_trigger = 1;
 		break;
@@ -3260,7 +3264,7 @@ static void sci_remove(struct platform_device *dev)
 
 	if (port->port.fifosize > 1)
 		device_remove_file(&dev->dev, &dev_attr_rx_fifo_trigger);
-	if (type == PORT_SCIFA || type == PORT_SCIFB || type == PORT_HSCIF)
+	if (type == PORT_SCIFA || type == PORT_SCIFB || type == PORT_HSCIF || type == PORT_RZSCI)
 		device_remove_file(&dev->dev, &dev_attr_rx_fifo_timeout);
 }
 
@@ -3291,6 +3295,12 @@ static const struct of_device_id of_sci_match[] __maybe_unused = {
 		.compatible = "renesas,scif-r9a09g057",
 		.data = SCI_OF_DATA(PORT_SCIF, SCIx_RZV2H_SCIF_REGTYPE),
 	},
+#ifdef CONFIG_SERIAL_RZ_SCI
+	{
+		.compatible = "renesas,r9a09g077-sci",
+		.data = &sci_r9a09g077_data,
+	},
+#endif	/* CONFIG_SERIAL_RZ_SCI */
 	/* Family-specific types */
 	{
 		.compatible = "renesas,rcar-gen1-scif",
@@ -3496,7 +3506,7 @@ static int sci_probe(struct platform_device *dev)
 			return ret;
 	}
 	if (sp->port.type == PORT_SCIFA || sp->port.type == PORT_SCIFB ||
-	    sp->port.type == PORT_HSCIF) {
+	    sp->port.type == PORT_HSCIF || sp->port.type == PORT_RZSCI) {
 		ret = device_create_file(&dev->dev, &dev_attr_rx_fifo_timeout);
 		if (ret) {
 			if (sp->port.fifosize > 1) {
diff --git a/include/linux/serial_sci.h b/include/linux/serial_sci.h
index 0f2f50b8d28e..787fd9a96711 100644
--- a/include/linux/serial_sci.h
+++ b/include/linux/serial_sci.h
@@ -38,6 +38,7 @@ enum {
 	SCIx_HSCIF_REGTYPE,
 	SCIx_RZ_SCIFA_REGTYPE,
 	SCIx_RZV2H_SCIF_REGTYPE,
+	SCIx_RZT2H_SCI_REGTYPE,
 
 	SCIx_NR_REGTYPES,
 };
@@ -50,7 +51,7 @@ struct plat_sci_port_ops {
  * Platform device specific platform_data struct
  */
 struct plat_sci_port {
-	unsigned int	type;			/* SCI / SCIF / IRDA / HSCIF */
+	unsigned int	type;			/* SCI / SCIF / IRDA / HSCIF / RZSCI */
 	upf_t		flags;			/* UPF_* flags */
 
 	unsigned int	sampling_rate;
diff --git a/include/uapi/linux/serial_core.h b/include/uapi/linux/serial_core.h
index 9c007a106330..30fbbef599f4 100644
--- a/include/uapi/linux/serial_core.h
+++ b/include/uapi/linux/serial_core.h
@@ -231,6 +231,9 @@
 /* Sunplus UART */
 #define PORT_SUNPLUS	123
 
+/* SH-SCI */
+#define PORT_RZSCI	124
+
 /* Generic type identifier for ports which type is not important to userspace. */
 #define PORT_GENERIC	(-1)
 
-- 
2.43.0

[PATCH v2 11/13] arm64: dts: renesas: Add initial support for renesas RZ/T2H SoC

[Thierry Bultel]

Add the initial dtsi for the RZ/T2H Soc:

- gic
- armv8-timer
- cpg clock
- sci0 uart

also add arch/arm64/boot/dts/renesas/r9a09g077m44.dtsi, that keeps
all 4 CPUs enabled, for consistency with later support of -m24
and -m04 SoC revisions, that only have 2 and 1 Cortex-A55, respectively,
and that will use /delete-node/ to disable the missing CPUs.

Signed-off-by: Thierry Bultel <thierry.bultel.yh@bp.renesas.com>
---
 arch/arm64/boot/dts/renesas/r9a09g077.dtsi    | 129 ++++++++++++++++++
 arch/arm64/boot/dts/renesas/r9a09g077m44.dtsi |  13 ++
 2 files changed, 142 insertions(+)
 create mode 100644 arch/arm64/boot/dts/renesas/r9a09g077.dtsi
 create mode 100644 arch/arm64/boot/dts/renesas/r9a09g077m44.dtsi

diff --git a/arch/arm64/boot/dts/renesas/r9a09g077.dtsi b/arch/arm64/boot/dts/renesas/r9a09g077.dtsi
new file mode 100644
index 000000000000..0450517f1a69
--- /dev/null
+++ b/arch/arm64/boot/dts/renesas/r9a09g077.dtsi
@@ -0,0 +1,129 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+/*
+ * Device Tree Source for the RZ/T2H SoC
+ *
+ * Copyright (C) 2025 Renesas Electronics Corp.
+ */
+
+#include <dt-bindings/clock/r9a09g077-cpg-mssr.h>
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+
+/ {
+	compatible = "renesas,r9a09g077";
+	#address-cells = <2>;
+	#size-cells = <2>;
+
+	extal_clk: extal {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		/* This value must be overridden by the board */
+		clock-frequency = <0>;
+	};
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		l3_ca55: cache-controller-0 {
+			compatible = "cache";
+			cache-unified;
+			cache-size = <0x100000>;
+			cache-level = <3>;
+		};
+
+		cpu0: cpu@0 {
+			compatible = "arm,cortex-a55";
+			reg = <0>;
+			device_type = "cpu";
+			next-level-cache = <&l3_ca55>;
+			enable-method = "psci";
+		};
+
+		cpu1: cpu@100 {
+			compatible = "arm,cortex-a55";
+			reg = <0x100>;
+			device_type = "cpu";
+			next-level-cache = <&l3_ca55>;
+			enable-method = "psci";
+		};
+
+		cpu2: cpu@200 {
+			compatible = "arm,cortex-a55";
+			reg = <0x200>;
+			device_type = "cpu";
+			next-level-cache = <&l3_ca55>;
+			enable-method = "psci";
+		};
+
+		cpu3: cpu@300 {
+			compatible = "arm,cortex-a55";
+			reg = <0x300>;
+			device_type = "cpu";
+			next-level-cache = <&l3_ca55>;
+			enable-method = "psci";
+		};
+	};
+
+	loco_clk: loco {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		/* This value must be overridden by the board */
+		clock-frequency = <0>;
+	};
+
+	psci {
+		compatible = "arm,psci-1.0", "arm,psci-0.2";
+		method = "smc";
+	};
+
+	soc: soc {
+		compatible = "simple-bus";
+		interrupt-parent = <&gic>;
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		sci0: serial@80005000 {
+			compatible = "renesas,r9a09g077-sci";
+			reg = <0 0x80005000 0 0x400>;
+			interrupts = <GIC_SPI 590 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 591 IRQ_TYPE_EDGE_RISING>,
+				     <GIC_SPI 592 IRQ_TYPE_EDGE_RISING>,
+				     <GIC_SPI 593 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "eri", "rxi", "txi", "tei";
+			clocks = <&cpg CPG_MOD 108>;
+			clock-names = "fck";
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
+		cpg: clock-controller@80280000 {
+			compatible = "renesas,r9a09g077-cpg-mssr";
+			reg = <0 0x80280000 0 0x1000>,
+			      <0 0x81280000 0 0x9000>;
+			clocks = <&extal_clk>, <&loco_clk>;
+			clock-names = "extal", "loco";
+			#clock-cells = <2>;
+			#reset-cells = <1>;
+			#power-domain-cells = <0>;
+		};
+
+		gic: interrupt-controller@83000000 {
+			compatible = "arm,gic-v3";
+			reg = <0x0 0x83000000 0 0x40000>,
+			      <0x0 0x83040000 0 0x160000>;
+			#interrupt-cells = <3>;
+			#address-cells = <0>;
+			interrupt-controller;
+			interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_LOW>;
+		};
+	};
+
+	timer {
+		compatible = "arm,armv8-timer";
+		interrupts-extended = <&gic GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
+				      <&gic GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
+				      <&gic GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
+				      <&gic GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>;
+	};
+};
diff --git a/arch/arm64/boot/dts/renesas/r9a09g077m44.dtsi b/arch/arm64/boot/dts/renesas/r9a09g077m44.dtsi
new file mode 100644
index 000000000000..6f4a11b39d12
--- /dev/null
+++ b/arch/arm64/boot/dts/renesas/r9a09g077m44.dtsi
@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+/*
+ * Device Tree Source for the RZ/T2H 4-core SoC
+ *
+ * Copyright (C) 2025 Renesas Electronics Corp.
+ */
+
+/dts-v1/;
+#include "r9a09g077.dtsi"
+
+/ {
+	compatible = "renesas,r9a09g077m44", "renesas,r9a09g077";
+};
-- 
2.43.0

[PATCH v2 12/13] arm64: dts: renesas: Add initial support for renesas RZ/T2H eval board

[Thierry Bultel]

Add the initial device tree for the RZ/T2H evaluation board.

Signed-off-by: Thierry Bultel <thierry.bultel.yh@bp.renesas.com>
---
 arch/arm64/boot/dts/renesas/Makefile          |  1 +
 .../dts/renesas/r9a09g077m44-rzt2h-evk.dts    | 35 +++++++++++++++++++
 2 files changed, 36 insertions(+)
 create mode 100644 arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts

diff --git a/arch/arm64/boot/dts/renesas/Makefile b/arch/arm64/boot/dts/renesas/Makefile
index 97228a3cb99c..422ff9ccd05e 100644
--- a/arch/arm64/boot/dts/renesas/Makefile
+++ b/arch/arm64/boot/dts/renesas/Makefile
@@ -140,6 +140,7 @@ dtb-$(CONFIG_ARCH_R9A08G045) += r9a08g045s33-smarc.dtb
 
 dtb-$(CONFIG_ARCH_R9A09G011) += r9a09g011-v2mevk2.dtb
 
+dtb-$(CONFIG_ARCH_R9A09G077) += r9a09g077m44-rzt2h-evk.dtb
 dtb-$(CONFIG_ARCH_R9A09G057) += r9a09g057h44-rzv2h-evk.dtb
 
 dtb-$(CONFIG_ARCH_RCAR_GEN3) += draak-ebisu-panel-aa104xd12.dtbo
diff --git a/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts b/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts
new file mode 100644
index 000000000000..44d19fa3589b
--- /dev/null
+++ b/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts
@@ -0,0 +1,35 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+/*
+ * Device Tree Source for the RZ/T2H Development EVK board
+ *
+ * Copyright (C) 2025 Renesas Electronics Corp.
+ */
+
+/dts-v1/;
+
+#include "r9a09g077m44.dtsi"
+
+/ {
+	model = "Renesas Development EVK based on r9a09g077m44";
+	compatible = "renesas,r9a9g077m44-rzt2h-evk", "renesas,r9a9g077m44", "renesas,r9a9g077";
+
+	aliases {
+		serial0 = &sci0;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+};
+
+&extal_clk {
+	clock-frequency = <25000000>;
+};
+
+&loco_clk {
+	clock-frequency = <1000000>;
+};
+
+&sci0 {
+	status = "okay";
+};
-- 
2.43.0

Re: [PATCH v2 12/13] arm64: dts: renesas: Add initial support for renesas RZ/T2H eval board

[Geert Uytterhoeven]

Hi Thierry,

On Mon, 17 Feb 2025 at 11:55, Thierry Bultel
<thierry.bultel.yh@bp.renesas.com> wrote:
> Add the initial device tree for the RZ/T2H evaluation board.
>
> Signed-off-by: Thierry Bultel <thierry.bultel.yh@bp.renesas.com>

Thanks for your patch!

> --- /dev/null
> +++ b/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts
> @@ -0,0 +1,35 @@
> +// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +/*
> + * Device Tree Source for the RZ/T2H Development EVK board
> + *
> + * Copyright (C) 2025 Renesas Electronics Corp.
> + */
> +
> +/dts-v1/;
> +
> +#include "r9a09g077m44.dtsi"
> +
> +/ {
> +       model = "Renesas Development EVK based on r9a09g077m44";
> +       compatible = "renesas,r9a9g077m44-rzt2h-evk", "renesas,r9a9g077m44", "renesas,r9a9g077";

s/r9a9g077/r9a09g077/

"make dtbs_check" would have told you...

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

[PATCH v2 13/13] defconfig: Enable RZ/T2H Soc and RZ_SCI

[Thierry Bultel]

Signed-off-by: Thierry Bultel <thierry.bultel.yh@bp.renesas.com>
---
 arch/arm64/configs/defconfig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index c62831e61586..a1cc7a37386d 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -486,6 +486,7 @@ CONFIG_SERIAL_TEGRA_TCU=y
 CONFIG_SERIAL_IMX=y
 CONFIG_SERIAL_IMX_CONSOLE=y
 CONFIG_SERIAL_SH_SCI=y
+CONFIG_SERIAL_RZ_SCI=y
 CONFIG_SERIAL_MSM=y
 CONFIG_SERIAL_MSM_CONSOLE=y
 CONFIG_SERIAL_QCOM_GENI=y
@@ -1457,6 +1458,7 @@ CONFIG_ARCH_R9A07G054=y
 CONFIG_ARCH_R9A08G045=y
 CONFIG_ARCH_R9A09G011=y
 CONFIG_ARCH_R9A09G057=y
+CONFIG_ARCH_R9A09G077=y
 CONFIG_ROCKCHIP_IODOMAIN=y
 CONFIG_ARCH_TEGRA_132_SOC=y
 CONFIG_ARCH_TEGRA_210_SOC=y
-- 
2.43.0

Re: [PATCH v2 13/13] defconfig: Enable RZ/T2H Soc and RZ_SCI

[Krzysztof Kozlowski]

On 17/02/2025 11:52, Thierry Bultel wrote:
> Signed-off-by: Thierry Bultel <thierry.bultel.yh@bp.renesas.com>


Still missing commit msg. Still no explanation why do we want this patch.


Best regards,
Krzysztof

Re: [PATCH v2 13/13] defconfig: Enable RZ/T2H Soc and RZ_SCI

[Krzysztof Kozlowski]

On 18/02/2025 08:20, Krzysztof Kozlowski wrote:
> On 17/02/2025 11:52, Thierry Bultel wrote:
>> Signed-off-by: Thierry Bultel <thierry.bultel.yh@bp.renesas.com>
> 
> 
> Still missing commit msg. Still no explanation why do we want this patch.


And you completely ignored all previous comments.

Best regards,
Krzysztof