[PATCH v4 0/5] pinctrl: sunxi: Add H3 R_PIO controller support

[PATCH v4 0/5] pinctrl: sunxi: Add H3 R_PIO controller support

[Krzysztof Adamski]

This patch series is extension of my original single patch with the same
subject. It adds support for R_PIO so that GPIO port L can be used in H3
based devices. It was tested on OrangePi PC where PL is connected amount
others to an onboard led, a switch, an IR receiver and some VCC
controllers.

Patchset is based on next-20160209.

--- 

Changes since v3:
- collect some acked-bys
- fix r_pios #interrupt-cells

Changes since v2:
- fixed apb0 parrent clocks list
- moved binding documentation change to the proper patch
- simplified sunxi_pinctrl_gpio_get according to ChenYu suggestions
- fixed ordering in sunxi binding documentation

Changes since v1:
- splited patch to two separate - dtsi and c files
- added APB0 clocks a parent for R_PIO
- added fix in sunxi_pinctrl_gpio_get for getting pin value when in irq
  mode and on 2nd pinctrl
- fixed a "pwn" > "pwm" typo
- fixed order in allwinner,sunxi-pinctrl.txt


Krzysztof Adamski (5):
  clk: sunxi: Add apb0 gates for H3
  dts: sun8i-h3: Add APB0 related clocks and resets
  pinctrl: sunxi: Add H3 R_PIO controller support
  ARM: dts: sun8i-h3: Add R_PIO controller node to the dtsi
  pinctrl: sunxi: Use pin number when calling sunxi_pmx_set

 Documentation/devicetree/bindings/clock/sunxi.txt  |   1 +
 .../bindings/pinctrl/allwinner,sunxi-pinctrl.txt   |   1 +
 arch/arm/boot/dts/sun8i-h3.dtsi                    |  36 +++++++
 drivers/clk/sunxi/clk-simple-gates.c               |   2 +
 drivers/pinctrl/sunxi/Kconfig                      |   4 +
 drivers/pinctrl/sunxi/Makefile                     |   1 +
 drivers/pinctrl/sunxi/pinctrl-sun8i-h3-r.c         | 106 +++++++++++++++++++++
 drivers/pinctrl/sunxi/pinctrl-sunxi.c              |   5 +-
 8 files changed, 154 insertions(+), 2 deletions(-)
 create mode 100644 drivers/pinctrl/sunxi/pinctrl-sun8i-h3-r.c

-- 
2.1.4

[PATCH v4 1/5] clk: sunxi: Add apb0 gates for H3

[Krzysztof Adamski]

This patch adds support for APB0 in H3. It seems to be compatible with
earlier SOCs. apb0 gates controls R_ block peripherals (R_PIO, R_IR,
etc).

Signed-off-by: Krzysztof Adamski <k@japko.eu>
---
 Documentation/devicetree/bindings/clock/sunxi.txt | 1 +
 drivers/clk/sunxi/clk-simple-gates.c              | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/clock/sunxi.txt b/Documentation/devicetree/bindings/clock/sunxi.txt
index 966dcaf..b74f430 100644
--- a/Documentation/devicetree/bindings/clock/sunxi.txt
+++ b/Documentation/devicetree/bindings/clock/sunxi.txt
@@ -46,6 +46,7 @@ Required properties:
 	"allwinner,sun6i-a31-apb0-gates-clk" - for the APB0 gates on A31
 	"allwinner,sun7i-a20-apb0-gates-clk" - for the APB0 gates on A20
 	"allwinner,sun8i-a23-apb0-gates-clk" - for the APB0 gates on A23
+	"allwinner,sun8i-h3-apb0-gates-clk" - for the APB0 gates on H3
 	"allwinner,sun9i-a80-apb0-gates-clk" - for the APB0 gates on A80
 	"allwinner,sun4i-a10-apb1-clk" - for the APB1 clock
 	"allwinner,sun9i-a80-apb1-clk" - for the APB1 bus clock on A80
diff --git a/drivers/clk/sunxi/clk-simple-gates.c b/drivers/clk/sunxi/clk-simple-gates.c
index 2cfc5a8..940e7c1 100644
--- a/drivers/clk/sunxi/clk-simple-gates.c
+++ b/drivers/clk/sunxi/clk-simple-gates.c
@@ -132,6 +132,8 @@ CLK_OF_DECLARE(sun8i_a33_ahb1, "allwinner,sun8i-a33-ahb1-gates-clk",
 	       sunxi_simple_gates_init);
 CLK_OF_DECLARE(sun8i_a83t_apb0, "allwinner,sun8i-a83t-apb0-gates-clk",
 	       sunxi_simple_gates_init);
+CLK_OF_DECLARE(sun8i_h3_apb0, "allwinner,sun8i-h3-apb0-gates-clk",
+	       sunxi_simple_gates_init);
 CLK_OF_DECLARE(sun9i_a80_ahb0, "allwinner,sun9i-a80-ahb0-gates-clk",
 	       sunxi_simple_gates_init);
 CLK_OF_DECLARE(sun9i_a80_ahb1, "allwinner,sun9i-a80-ahb1-gates-clk",
-- 
2.1.4

[PATCH v4 2/5] dts: sun8i-h3: Add APB0 related clocks and resets

[Krzysztof Adamski]

APB0 is bearly mentioned in H3 User Manual and it is only setup in the
Allwinners kernel dump for CIR. I have verified experimentally that the
gate for R_PIO exists and works, though. There are probably other gates
there but I don't know their order right now and I don't have access to
their peripherals on my board to test them.

After some experiments and reviewing how this is organized on other
sunxi SoCs, I couldn't actually find any way to disable clocks for R_PIO
and they are working properly without doing anything so I assume they
are connected straight to the 24Mhz oscillator for now.

Signed-off-by: Krzysztof Adamski <k@japko.eu>
---
 arch/arm/boot/dts/sun8i-h3.dtsi | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/arch/arm/boot/dts/sun8i-h3.dtsi b/arch/arm/boot/dts/sun8i-h3.dtsi
index 6f6b4e4..a7b2c53 100644
--- a/arch/arm/boot/dts/sun8i-h3.dtsi
+++ b/arch/arm/boot/dts/sun8i-h3.dtsi
@@ -285,6 +285,24 @@
 			clocks = <&osc24M>, <&pll6x2>, <&pll5>;
 			clock-output-names = "mbus";
 		};
+
+		apb0: apb0_clk {
+			compatible = "fixed-factor-clock";
+			#clock-cells = <0>;
+			clock-div = <1>;
+			clock-mult = <1>;
+			clocks = <&osc24M>;
+			clock-output-names = "apb0";
+		};
+
+		apb0_gates: clk@01f01428 {
+			compatible = "allwinner,sun8i-h3-apb0-gates-clk";
+			reg = <0x01f01428 0x4>;
+			#clock-cells = <1>;
+			clocks = <&apb0>;
+			clock-indices = <0>, <1>;
+			clock-output-names = "apb0_pio", "apb0_ir";
+		};
 	};
 
 	soc {
@@ -502,5 +520,11 @@
 			interrupts = <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>,
 				     <GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH>;
 		};
+
+		apb0_reset: reset@01f014b0 {
+			reg = <0x01f014b0 0x4>;
+			compatible = "allwinner,sun6i-a31-clock-reset";
+			#reset-cells = <1>;
+		};
 	};
 };
-- 
2.1.4

[PATCH v4 3/5] pinctrl: sunxi: Add H3 R_PIO controller support

[Krzysztof Adamski]

H3 has additional PIO controller similar to what we can find on A23.
It's a 12 pin port, described in H3 Datasheet rev 1.1, pages 345-350.

Signed-off-by: Krzysztof Adamski <k@japko.eu>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
---
 .../bindings/pinctrl/allwinner,sunxi-pinctrl.txt   |   1 +
 drivers/pinctrl/sunxi/Kconfig                      |   4 +
 drivers/pinctrl/sunxi/Makefile                     |   1 +
 drivers/pinctrl/sunxi/pinctrl-sun8i-h3-r.c         | 106 +++++++++++++++++++++
 4 files changed, 112 insertions(+)
 create mode 100644 drivers/pinctrl/sunxi/pinctrl-sun8i-h3-r.c

diff --git a/Documentation/devicetree/bindings/pinctrl/allwinner,sunxi-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/allwinner,sunxi-pinctrl.txt
index 9213b27..3e56b16 100644
--- a/Documentation/devicetree/bindings/pinctrl/allwinner,sunxi-pinctrl.txt
+++ b/Documentation/devicetree/bindings/pinctrl/allwinner,sunxi-pinctrl.txt
@@ -21,6 +21,7 @@ Required properties:
   "allwinner,sun9i-a80-r-pinctrl"
   "allwinner,sun8i-a83t-pinctrl"
   "allwinner,sun8i-h3-pinctrl"
+  "allwinner,sun8i-h3-r-pinctrl"
 
 - reg: Should contain the register physical address and length for the
   pin controller.
diff --git a/drivers/pinctrl/sunxi/Kconfig b/drivers/pinctrl/sunxi/Kconfig
index f8dbc8b..75a26c9 100644
--- a/drivers/pinctrl/sunxi/Kconfig
+++ b/drivers/pinctrl/sunxi/Kconfig
@@ -55,6 +55,10 @@ config PINCTRL_SUN8I_H3
 	def_bool MACH_SUN8I
 	select PINCTRL_SUNXI_COMMON
 
+config PINCTRL_SUN8I_H3_R
+	def_bool MACH_SUN8I
+	select PINCTRL_SUNXI_COMMON
+
 config PINCTRL_SUN9I_A80
 	def_bool MACH_SUN9I
 	select PINCTRL_SUNXI_COMMON
diff --git a/drivers/pinctrl/sunxi/Makefile b/drivers/pinctrl/sunxi/Makefile
index ef82f22..a5d56f1 100644
--- a/drivers/pinctrl/sunxi/Makefile
+++ b/drivers/pinctrl/sunxi/Makefile
@@ -14,5 +14,6 @@ obj-$(CONFIG_PINCTRL_SUN8I_A23_R)	+= pinctrl-sun8i-a23-r.o
 obj-$(CONFIG_PINCTRL_SUN8I_A33)		+= pinctrl-sun8i-a33.o
 obj-$(CONFIG_PINCTRL_SUN8I_A83T)	+= pinctrl-sun8i-a83t.o
 obj-$(CONFIG_PINCTRL_SUN8I_H3)		+= pinctrl-sun8i-h3.o
+obj-$(CONFIG_PINCTRL_SUN8I_H3_R)	+= pinctrl-sun8i-h3-r.o
 obj-$(CONFIG_PINCTRL_SUN9I_A80)		+= pinctrl-sun9i-a80.o
 obj-$(CONFIG_PINCTRL_SUN9I_A80_R)	+= pinctrl-sun9i-a80-r.o
diff --git a/drivers/pinctrl/sunxi/pinctrl-sun8i-h3-r.c b/drivers/pinctrl/sunxi/pinctrl-sun8i-h3-r.c
new file mode 100644
index 0000000..686ec21
--- /dev/null
+++ b/drivers/pinctrl/sunxi/pinctrl-sun8i-h3-r.c
@@ -0,0 +1,106 @@
+/*
+ * Allwinner H3 SoCs pinctrl driver.
+ *
+ * Copyright (C) 2016 Krzysztof Adamski <k@japko.eu>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/pinctrl/pinctrl.h>
+
+#include "pinctrl-sunxi.h"
+
+static const struct sunxi_desc_pin sun8i_h3_r_pins[] = {
+	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 0),
+		  SUNXI_FUNCTION(0x0, "gpio_in"),
+		  SUNXI_FUNCTION(0x1, "gpio_out"),
+		  SUNXI_FUNCTION(0x2, "s_twi"),         /* SCK */
+		  SUNXI_FUNCTION_IRQ_BANK(0x6, 0, 0)),	/* PL_EINT0 */
+	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 1),
+		  SUNXI_FUNCTION(0x0, "gpio_in"),
+		  SUNXI_FUNCTION(0x1, "gpio_out"),
+		  SUNXI_FUNCTION(0x2, "s_twi"),         /* SDA */
+		  SUNXI_FUNCTION_IRQ_BANK(0x6, 0, 1)),	/* PL_EINT1 */
+	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 2),
+		  SUNXI_FUNCTION(0x0, "gpio_in"),
+		  SUNXI_FUNCTION(0x1, "gpio_out"),
+		  SUNXI_FUNCTION(0x2, "s_uart"),        /* TX */
+		  SUNXI_FUNCTION_IRQ_BANK(0x6, 0, 2)),	/* PL_EINT2 */
+	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 3),
+		  SUNXI_FUNCTION(0x0, "gpio_in"),
+		  SUNXI_FUNCTION(0x1, "gpio_out"),
+		  SUNXI_FUNCTION(0x2, "s_uart"),        /* RX */
+		  SUNXI_FUNCTION_IRQ_BANK(0x6, 0, 3)),	/* PL_EINT3 */
+	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 4),
+		  SUNXI_FUNCTION(0x0, "gpio_in"),
+		  SUNXI_FUNCTION(0x1, "gpio_out"),
+		  SUNXI_FUNCTION(0x2, "s_jtag"),        /* MS */
+		  SUNXI_FUNCTION_IRQ_BANK(0x6, 0, 4)),	/* PL_EINT4 */
+	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 5),
+		  SUNXI_FUNCTION(0x0, "gpio_in"),
+		  SUNXI_FUNCTION(0x1, "gpio_out"),
+		  SUNXI_FUNCTION(0x2, "s_jtag"),        /* CK */
+		  SUNXI_FUNCTION_IRQ_BANK(0x6, 0, 5)),	/* PL_EINT5 */
+	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 6),
+		  SUNXI_FUNCTION(0x0, "gpio_in"),
+		  SUNXI_FUNCTION(0x1, "gpio_out"),
+		  SUNXI_FUNCTION(0x2, "s_jtag"),        /* DO */
+		  SUNXI_FUNCTION_IRQ_BANK(0x6, 0, 6)),	/* PL_EINT6 */
+	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 7),
+		  SUNXI_FUNCTION(0x0, "gpio_in"),
+		  SUNXI_FUNCTION(0x1, "gpio_out"),
+		  SUNXI_FUNCTION(0x2, "s_jtag"),        /* DI */
+		  SUNXI_FUNCTION_IRQ_BANK(0x6, 0, 7)),	/* PL_EINT7 */
+	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 8),
+		  SUNXI_FUNCTION(0x0, "gpio_in"),
+		  SUNXI_FUNCTION(0x1, "gpio_out"),
+		  SUNXI_FUNCTION_IRQ_BANK(0x6, 0, 8)),	/* PL_EINT8 */
+	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 9),
+		  SUNXI_FUNCTION(0x0, "gpio_in"),
+		  SUNXI_FUNCTION(0x1, "gpio_out"),
+		  SUNXI_FUNCTION_IRQ_BANK(0x6, 0, 9)),	/* PL_EINT9 */
+	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 10),
+		  SUNXI_FUNCTION(0x0, "gpio_in"),
+		  SUNXI_FUNCTION(0x1, "gpio_out"),
+		  SUNXI_FUNCTION(0x2, "s_pwm"),
+		  SUNXI_FUNCTION_IRQ_BANK(0x6, 0, 10)),	/* PL_EINT10 */
+	SUNXI_PIN(SUNXI_PINCTRL_PIN(L, 11),
+		  SUNXI_FUNCTION(0x0, "gpio_in"),
+		  SUNXI_FUNCTION(0x1, "gpio_out"),
+		  SUNXI_FUNCTION(0x2, "s_cir_rx"),
+		  SUNXI_FUNCTION_IRQ_BANK(0x6, 0, 11)),	/* PL_EINT11 */
+};
+
+static const struct sunxi_pinctrl_desc sun8i_h3_r_pinctrl_data = {
+	.pins = sun8i_h3_r_pins,
+	.npins = ARRAY_SIZE(sun8i_h3_r_pins),
+	.irq_banks = 1,
+	.pin_base = PL_BASE,
+	.irq_read_needs_mux = true
+};
+
+static int sun8i_h3_r_pinctrl_probe(struct platform_device *pdev)
+{
+	return sunxi_pinctrl_init(pdev,
+				  &sun8i_h3_r_pinctrl_data);
+}
+
+static const struct of_device_id sun8i_h3_r_pinctrl_match[] = {
+	{ .compatible = "allwinner,sun8i-h3-r-pinctrl", },
+	{}
+};
+
+static struct platform_driver sun8i_h3_r_pinctrl_driver = {
+	.probe	= sun8i_h3_r_pinctrl_probe,
+	.driver	= {
+		.name		= "sun8i-h3-r-pinctrl",
+		.of_match_table	= sun8i_h3_r_pinctrl_match,
+	},
+};
+builtin_platform_driver(sun8i_h3_r_pinctrl_driver);
-- 
2.1.4

[PATCH v4 4/5] ARM: dts: sun8i-h3: Add R_PIO controller node to the dtsi

[Krzysztof Adamski]

Add the corresponding device node for R_PIO on H3 to the dtsi. Support
for the controller was added in earlier commit.

Signed-off-by: Krzysztof Adamski <k@japko.eu>
---
 arch/arm/boot/dts/sun8i-h3.dtsi | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm/boot/dts/sun8i-h3.dtsi b/arch/arm/boot/dts/sun8i-h3.dtsi
index a7b2c53..528e34c 100644
--- a/arch/arm/boot/dts/sun8i-h3.dtsi
+++ b/arch/arm/boot/dts/sun8i-h3.dtsi
@@ -526,5 +526,17 @@
 			compatible = "allwinner,sun6i-a31-clock-reset";
 			#reset-cells = <1>;
 		};
+
+		r_pio: pinctrl@01f02c00 {
+			compatible = "allwinner,sun8i-h3-r-pinctrl";
+			reg = <0x01f02c00 0x400>;
+			interrupts = <GIC_SPI 45 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&apb0_gates 0>;
+			resets = <&apb0_reset 0>;
+			gpio-controller;
+			#gpio-cells = <3>;
+			interrupt-controller;
+			#interrupt-cells = <3>;
+		};
 	};
 };
-- 
2.1.4

[PATCH v4 5/5] pinctrl: sunxi: Use pin number when calling sunxi_pmx_set

[Krzysztof Adamski]

sunxi_pmx_set accepts pin number and then calculates offset by
subtracting pin_base from it. sunxi_pinctrl_gpio_get, on the other hand,
gets offset so we have to convert it to pin number so we won't get
negative value in sunxi_pmx_set.

This was only used on A10 so far, where there is only one GPIO chip with
pin_base set to 0 so it didn't matter. However H3 also requires this
workaround but have two pinmux sections, triggering problem for PL port.

Signed-off-by: Krzysztof Adamski <k@japko.eu>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
---
 drivers/pinctrl/sunxi/pinctrl-sunxi.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi.c b/drivers/pinctrl/sunxi/pinctrl-sunxi.c
index 7a2465f..96f64a1 100644
--- a/drivers/pinctrl/sunxi/pinctrl-sunxi.c
+++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.c
@@ -459,15 +459,16 @@ static int sunxi_pinctrl_gpio_get(struct gpio_chip *chip, unsigned offset)
 	u8 index = sunxi_data_offset(offset);
 	u32 set_mux = pctl->desc->irq_read_needs_mux &&
 			test_bit(FLAG_USED_AS_IRQ, &chip->desc[offset].flags);
+	u32 pin = offset + chip->base;
 	u32 val;
 
 	if (set_mux)
-		sunxi_pmx_set(pctl->pctl_dev, offset, SUN4I_FUNC_INPUT);
+		sunxi_pmx_set(pctl->pctl_dev, pin, SUN4I_FUNC_INPUT);
 
 	val = (readl(pctl->membase + reg) >> index) & DATA_PINS_MASK;
 
 	if (set_mux)
-		sunxi_pmx_set(pctl->pctl_dev, offset, SUN4I_FUNC_IRQ);
+		sunxi_pmx_set(pctl->pctl_dev, pin, SUN4I_FUNC_IRQ);
 
 	return !!val;
 }
-- 
2.1.4

Re: [PATCH v4 5/5] pinctrl: sunxi: Use pin number when calling sunxi_pmx_set

[Linus Walleij]

On Tue, Feb 9, 2016 at 3:58 PM, Krzysztof Adamski
<krzysztof.adamski@tieto.com> wrote:

> sunxi_pmx_set accepts pin number and then calculates offset by
> subtracting pin_base from it. sunxi_pinctrl_gpio_get, on the other hand,
> gets offset so we have to convert it to pin number so we won't get
> negative value in sunxi_pmx_set.
>
> This was only used on A10 so far, where there is only one GPIO chip with
> pin_base set to 0 so it didn't matter. However H3 also requires this
> workaround but have two pinmux sections, triggering problem for PL port.
>
> Signed-off-by: Krzysztof Adamski <k@japko.eu>
> Acked-by: Chen-Yu Tsai <wens@csie.org>
> Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>

OK applied this version that has Maxime's ACK.

Yours,
Linus Walleij