[PATCH 0/2] clk: meson8b: cleanup unused code

[PATCH 0/2] clk: meson8b: cleanup unused code

[Martin Blumenstingl]

Hi Jerome,

these patches are two small cleanups for code we don't need anymore.
The first patch removes support for old .dtbs. I am not sure if the
"fallback" logic still works as I have not tried this in a long time.


Martin Blumenstingl (2):
  clk: meson: meson8b: remove compatibility code for old .dtbs
  dt-bindings: clock: meson8b: remove non-existing clock macros

 drivers/clk/meson/meson8b.c              | 45 +++---------------------
 include/dt-bindings/clock/meson8b-clkc.h |  2 --
 2 files changed, 5 insertions(+), 42 deletions(-)

-- 
2.29.2


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[PATCH 1/2] clk: meson: meson8b: remove compatibility code for old .dtbs

[Martin Blumenstingl]

The XTAL clock is provided via .dts since Linux 5.6. Remove
compatibility code for .dtbs which are older than that.

The switch to the HHI syscon has been done with Linux 5.1. Also remove
any code needed to support .dtbs that have not switched to the HHI
syscon yet.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
 drivers/clk/meson/meson8b.c | 45 +++++--------------------------------
 1 file changed, 5 insertions(+), 40 deletions(-)

diff --git a/drivers/clk/meson/meson8b.c b/drivers/clk/meson/meson8b.c
index 862f0756b50f..a844d35b553a 100644
--- a/drivers/clk/meson/meson8b.c
+++ b/drivers/clk/meson/meson8b.c
@@ -52,15 +52,6 @@ static const struct pll_params_table sys_pll_params_table[] = {
 	{ /* sentinel */ },
 };
 
-static struct clk_fixed_rate meson8b_xtal = {
-	.fixed_rate = 24000000,
-	.hw.init = &(struct clk_init_data){
-		.name = "xtal",
-		.num_parents = 0,
-		.ops = &clk_fixed_rate_ops,
-	},
-};
-
 static struct clk_regmap meson8b_fixed_pll_dco = {
 	.data = &(struct meson_clk_pll_data){
 		.en = {
@@ -2715,7 +2706,6 @@ static MESON_GATE(meson8b_ao_iface, HHI_GCLK_AO, 3);
 
 static struct clk_hw_onecell_data meson8_hw_onecell_data = {
 	.hws = {
-		[CLKID_XTAL] = &meson8b_xtal.hw,
 		[CLKID_PLL_FIXED] = &meson8b_fixed_pll.hw,
 		[CLKID_PLL_VID] = &meson8b_vid_pll.hw,
 		[CLKID_PLL_SYS] = &meson8b_sys_pll.hw,
@@ -2922,7 +2912,6 @@ static struct clk_hw_onecell_data meson8_hw_onecell_data = {
 
 static struct clk_hw_onecell_data meson8b_hw_onecell_data = {
 	.hws = {
-		[CLKID_XTAL] = &meson8b_xtal.hw,
 		[CLKID_PLL_FIXED] = &meson8b_fixed_pll.hw,
 		[CLKID_PLL_VID] = &meson8b_vid_pll.hw,
 		[CLKID_PLL_SYS] = &meson8b_sys_pll.hw,
@@ -3140,7 +3129,6 @@ static struct clk_hw_onecell_data meson8b_hw_onecell_data = {
 
 static struct clk_hw_onecell_data meson8m2_hw_onecell_data = {
 	.hws = {
-		[CLKID_XTAL] = &meson8b_xtal.hw,
 		[CLKID_PLL_FIXED] = &meson8b_fixed_pll.hw,
 		[CLKID_PLL_VID] = &meson8b_vid_pll.hw,
 		[CLKID_PLL_SYS] = &meson8b_sys_pll.hw,
@@ -3725,36 +3713,19 @@ static struct meson8b_nb_data meson8b_cpu_nb_data = {
 	.nb.notifier_call = meson8b_cpu_clk_notifier_cb,
 };
 
-static const struct regmap_config clkc_regmap_config = {
-	.reg_bits       = 32,
-	.val_bits       = 32,
-	.reg_stride     = 4,
-};
-
 static void __init meson8b_clkc_init_common(struct device_node *np,
 			struct clk_hw_onecell_data *clk_hw_onecell_data)
 {
 	struct meson8b_clk_reset *rstc;
 	const char *notifier_clk_name;
 	struct clk *notifier_clk;
-	void __iomem *clk_base;
 	struct regmap *map;
 	int i, ret;
 
 	map = syscon_node_to_regmap(of_get_parent(np));
 	if (IS_ERR(map)) {
-		pr_info("failed to get HHI regmap - Trying obsolete regs\n");
-
-		/* Generic clocks, PLLs and some of the reset-bits */
-		clk_base = of_iomap(np, 1);
-		if (!clk_base) {
-			pr_err("%s: Unable to map clk base\n", __func__);
-			return;
-		}
-
-		map = regmap_init_mmio(NULL, clk_base, &clkc_regmap_config);
-		if (IS_ERR(map))
-			return;
+		pr_err("failed to get HHI regmap - Trying obsolete regs\n");
+		return;
 	}
 
 	rstc = kzalloc(sizeof(*rstc), GFP_KERNEL);
@@ -3778,16 +3749,10 @@ static void __init meson8b_clkc_init_common(struct device_node *np,
 		meson8b_clk_regmaps[i]->map = map;
 
 	/*
-	 * always skip CLKID_UNUSED and also skip XTAL if the .dtb provides the
-	 * XTAL clock as input.
+	 * register all clks and start with the first used ID (which is
+	 * CLKID_PLL_FIXED)
 	 */
-	if (!IS_ERR(of_clk_get_by_name(np, "xtal")))
-		i = CLKID_PLL_FIXED;
-	else
-		i = CLKID_XTAL;
-
-	/* register all clks */
-	for (; i < CLK_NR_CLKS; i++) {
+	for (i = CLKID_PLL_FIXED; i < CLK_NR_CLKS; i++) {
 		/* array might be sparse */
 		if (!clk_hw_onecell_data->hws[i])
 			continue;
-- 
2.29.2


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[PATCH 2/2] dt-bindings: clock: meson8b: remove non-existing clock macros

[Martin Blumenstingl]

CLKID_UNUSED and CLKID_XTAL aren't valid clocks. Remove them since
there are no consumers of this anymore.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
 include/dt-bindings/clock/meson8b-clkc.h | 2 --
 1 file changed, 2 deletions(-)

diff --git a/include/dt-bindings/clock/meson8b-clkc.h b/include/dt-bindings/clock/meson8b-clkc.h
index 4c5965ae1df4..f33781338eda 100644
--- a/include/dt-bindings/clock/meson8b-clkc.h
+++ b/include/dt-bindings/clock/meson8b-clkc.h
@@ -6,8 +6,6 @@
 #ifndef __MESON8B_CLKC_H
 #define __MESON8B_CLKC_H
 
-#define CLKID_UNUSED		0
-#define CLKID_XTAL		1
 #define CLKID_PLL_FIXED		2
 #define CLKID_PLL_VID		3
 #define CLKID_PLL_SYS		4
-- 
2.29.2


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Re: [PATCH 0/2] clk: meson8b: cleanup unused code

[Jerome Brunet]

On Mon 21 Dec 2020 at 19:36, Martin Blumenstingl <martin.blumenstingl@googlemail.com> wrote:

> Hi Jerome,
>
> these patches are two small cleanups for code we don't need anymore.
> The first patch removes support for old .dtbs. I am not sure if the
> "fallback" logic still works as I have not tried this in a long time.
>
>
> Martin Blumenstingl (2):
>   clk: meson: meson8b: remove compatibility code for old .dtbs
>   dt-bindings: clock: meson8b: remove non-existing clock macros
>
>  drivers/clk/meson/meson8b.c              | 45 +++---------------------
>  include/dt-bindings/clock/meson8b-clkc.h |  2 --
>  2 files changed, 5 insertions(+), 42 deletions(-)

Applied, Thx

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