[PATCH v1] clk: samsung: update CPU clk registration

Will McVicker
2021-10-15T19:05:43Z

Convert the remaining exynos clock drivers to use
samsung_clk_register_cpu() or if possible use
samsung_cmu_register_one(). With this we can now make
exynos_register_cpu_clock() a static function so that future CPU clock
registration changes will use the samsung common clock driver.

The main benefit of this change is that it standardizes the CPU clock
registration for the samsung clock drivers.

Signed-off-by: Will McVicker <willmcvicker@google.com>
---
drivers/clk/samsung/clk-cpu.c | 2 +-
drivers/clk/samsung/clk-cpu.h | 7 ----
drivers/clk/samsung/clk-exynos3250.c | 54 ++++++++++++++--------------
drivers/clk/samsung/clk-exynos4.c | 25 +++++++------
drivers/clk/samsung/clk-exynos5250.c | 13 +++----
drivers/clk/samsung/clk-exynos5420.c | 27 +++++++++-----
6 files changed, 67 insertions(+), 61 deletions(-)

diff --git a/drivers/clk/samsung/clk-cpu.c b/drivers/clk/samsung/clk-cpu.c
index 7f20d9aedaa9..3e62ade120c5 100644
--- a/drivers/clk/samsung/clk-cpu.c
+++ b/drivers/clk/samsung/clk-cpu.c
@@ -400,7 +400,7 @@ static int exynos5433_cpuclk_notifier_cb(struct notifier_block *nb,
}

/* helper function to register a CPU clock */
-int __init exynos_register_cpu_clock(struct samsung_clk_provider *ctx,
+static int __init exynos_register_cpu_clock(struct samsung_clk_provider *ctx,
unsigned int lookup_id, const char *name,
const struct clk_hw *parent, const struct clk_hw *alt_parent,
unsigned long offset, const struct exynos_cpuclk_cfg_data *cfg,
diff --git a/drivers/clk/samsung/clk-cpu.h b/drivers/clk/samsung/clk-cpu.h
index af74686db9ef..fc9f67a3b22e 100644
--- a/drivers/clk/samsung/clk-cpu.h
+++ b/drivers/clk/samsung/clk-cpu.h
@@ -62,11 +62,4 @@ struct exynos_cpuclk {
#define CLK_CPU_HAS_E5433_REGS_LAYOUT (1 << 2)
};

-int __init exynos_register_cpu_clock(struct samsung_clk_provider *ctx,
- unsigned int lookup_id, const char *name,
- const struct clk_hw *parent, const struct clk_hw *alt_parent,
- unsigned long offset,
- const struct exynos_cpuclk_cfg_data *cfg,
- unsigned long num_cfgs, unsigned long flags);
-
#endif /* __SAMSUNG_CLK_CPU_H */
diff --git a/drivers/clk/samsung/clk-exynos3250.c b/drivers/clk/samsung/clk-exynos3250.c
index 17df7f9755aa..6cc65ccf867c 100644
--- a/drivers/clk/samsung/clk-exynos3250.c
+++ b/drivers/clk/samsung/clk-exynos3250.c
@@ -748,6 +748,31 @@ static const struct samsung_pll_clock exynos3250_plls[] __initconst = {
UPLL_LOCK, UPLL_CON0, exynos3250_pll_rates),
};

+#define E3250_CPU_DIV0(apll, pclk_dbg, atb, corem) \
+ (((apll) << 24) | ((pclk_dbg) << 20) | ((atb) << 16) | \
+ ((corem) << 4))
+#define E3250_CPU_DIV1(hpm, copy) \
+ (((hpm) << 4) | ((copy) << 0))
+
+static const struct exynos_cpuclk_cfg_data e3250_armclk_d[] __initconst = {
+ { 1000000, E3250_CPU_DIV0(1, 7, 4, 1), E3250_CPU_DIV1(7, 7), },
+ { 900000, E3250_CPU_DIV0(1, 7, 3, 1), E3250_CPU_DIV1(7, 7), },
+ { 800000, E3250_CPU_DIV0(1, 7, 3, 1), E3250_CPU_DIV1(7, 7), },
+ { 700000, E3250_CPU_DIV0(1, 7, 3, 1), E3250_CPU_DIV1(7, 7), },
+ { 600000, E3250_CPU_DIV0(1, 7, 3, 1), E3250_CPU_DIV1(7, 7), },
+ { 500000, E3250_CPU_DIV0(1, 7, 3, 1), E3250_CPU_DIV1(7, 7), },
+ { 400000, E3250_CPU_DIV0(1, 7, 3, 1), E3250_CPU_DIV1(7, 7), },
+ { 300000, E3250_CPU_DIV0(1, 5, 3, 1), E3250_CPU_DIV1(7, 7), },
+ { 200000, E3250_CPU_DIV0(1, 3, 3, 1), E3250_CPU_DIV1(7, 7), },
+ { 100000, E3250_CPU_DIV0(1, 1, 1, 1), E3250_CPU_DIV1(7, 7), },
+ { 0 },
+};
+
+static const struct samsung_cpu_clock exynos3250_cpu_clks[] __initconst = {
+ CPU_CLK(CLK_ARM_CLK, "armclk", CLK_MOUT_APLL, CLK_MOUT_MPLL_USER_C,
+ CLK_CPU_HAS_DIV1, 0x14200, e3250_armclk_d),
+};
+
static void __init exynos3_core_down_clock(void __iomem *reg_base)
{
unsigned int tmp;
@@ -780,46 +805,21 @@ static const struct samsung_cmu_info cmu_info __initconst = {
.nr_gate_clks = ARRAY_SIZE(gate_clks),
.fixed_factor_clks = fixed_factor_clks,
.nr_fixed_factor_clks = ARRAY_SIZE(fixed_factor_clks),
+ .cpu_clks = exynos3250_cpu_clks,
+ .nr_cpu_clks = ARRAY_SIZE(exynos3250_cpu_clks),
.nr_clk_ids = CLK_NR_CLKS,
.clk_regs = exynos3250_cmu_clk_regs,
.nr_clk_regs = ARRAY_SIZE(exynos3250_cmu_clk_regs),
};

-#define E3250_CPU_DIV0(apll, pclk_dbg, atb, corem) \
- (((apll) << 24) | ((pclk_dbg) << 20) | ((atb) << 16) | \
- ((corem) << 4))
-#define E3250_CPU_DIV1(hpm, copy) \
- (((hpm) << 4) | ((copy) << 0))
-
-static const struct exynos_cpuclk_cfg_data e3250_armclk_d[] __initconst = {
- { 1000000, E3250_CPU_DIV0(1, 7, 4, 1), E3250_CPU_DIV1(7, 7), },
- { 900000, E3250_CPU_DIV0(1, 7, 3, 1), E3250_CPU_DIV1(7, 7), },
- { 800000, E3250_CPU_DIV0(1, 7, 3, 1), E3250_CPU_DIV1(7, 7), },
- { 700000, E3250_CPU_DIV0(1, 7, 3, 1), E3250_CPU_DIV1(7, 7), },
- { 600000, E3250_CPU_DIV0(1, 7, 3, 1), E3250_CPU_DIV1(7, 7), },
- { 500000, E3250_CPU_DIV0(1, 7, 3, 1), E3250_CPU_DIV1(7, 7), },
- { 400000, E3250_CPU_DIV0(1, 7, 3, 1), E3250_CPU_DIV1(7, 7), },
- { 300000, E3250_CPU_DIV0(1, 5, 3, 1), E3250_CPU_DIV1(7, 7), },
- { 200000, E3250_CPU_DIV0(1, 3, 3, 1), E3250_CPU_DIV1(7, 7), },
- { 100000, E3250_CPU_DIV0(1, 1, 1, 1), E3250_CPU_DIV1(7, 7), },
- { 0 },
-};
-
static void __init exynos3250_cmu_init(struct device_node *np)
{
struct samsung_clk_provider *ctx;
- struct clk_hw **hws;

ctx = samsung_cmu_register_one(np, &cmu_info);
if (!ctx)
return;

- hws = ctx->clk_data.hws;
- exynos_register_cpu_clock(ctx, CLK_ARM_CLK, "armclk",
- hws[CLK_MOUT_APLL], hws[CLK_MOUT_MPLL_USER_C],
- 0x14200, e3250_armclk_d, ARRAY_SIZE(e3250_armclk_d),
- CLK_CPU_HAS_DIV1);
-
exynos3_core_down_clock(ctx->reg_base);
}
CLK_OF_DECLARE(exynos3250_cmu, "samsung,exynos3250-cmu", exynos3250_cmu_init);
diff --git a/drivers/clk/samsung/clk-exynos4.c b/drivers/clk/samsung/clk-exynos4.c
index bf13e29a655c..9e98d59eb716 100644
--- a/drivers/clk/samsung/clk-exynos4.c
+++ b/drivers/clk/samsung/clk-exynos4.c
@@ -1228,12 +1228,21 @@ static const struct exynos_cpuclk_cfg_data e4412_armclk_d[] __initconst = {
{ 0 },
};

+static const struct samsung_cpu_clock exynos4210_cpu_clks[] __initconst = {
+ CPU_CLK(CLK_ARM_CLK, "armclk", CLK_MOUT_APLL, CLK_SCLK_MPLL,
+ CLK_CPU_NEEDS_DEBUG_ALT_DIV | CLK_CPU_HAS_DIV1, 0x14200, e4210_armclk_d),
+};
+
+static const struct samsung_cpu_clock exynos4412_cpu_clks[] __initconst = {
+ CPU_CLK(CLK_ARM_CLK, "armclk", CLK_MOUT_APLL, CLK_MOUT_MPLL_USER_C,
+ CLK_CPU_NEEDS_DEBUG_ALT_DIV | CLK_CPU_HAS_DIV1, 0x14200, e4412_armclk_d),
+};
+
/* register exynos4 clocks */
static void __init exynos4_clk_init(struct device_node *np,
enum exynos4_soc soc)
{
struct samsung_clk_provider *ctx;
- struct clk_hw **hws;

exynos4_soc = soc;

@@ -1242,7 +1251,6 @@ static void __init exynos4_clk_init(struct device_node *np,
panic("%s: failed to map registers\n", __func__);

ctx = samsung_clk_init(np, reg_base, CLK_NR_CLKS);
- hws = ctx->clk_data.hws;

samsung_clk_of_register_fixed_ext(ctx, exynos4_fixed_rate_ext_clks,
ARRAY_SIZE(exynos4_fixed_rate_ext_clks),
@@ -1304,10 +1312,8 @@ static void __init exynos4_clk_init(struct device_node *np,
samsung_clk_register_fixed_factor(ctx,
exynos4210_fixed_factor_clks,
ARRAY_SIZE(exynos4210_fixed_factor_clks));
- exynos_register_cpu_clock(ctx, CLK_ARM_CLK, "armclk",
- hws[CLK_MOUT_APLL], hws[CLK_SCLK_MPLL], 0x14200,
- e4210_armclk_d, ARRAY_SIZE(e4210_armclk_d),
- CLK_CPU_NEEDS_DEBUG_ALT_DIV | CLK_CPU_HAS_DIV1);
+ samsung_clk_register_cpu(ctx, exynos4210_cpu_clks,
+ ARRAY_SIZE(exynos4210_cpu_clks));
} else {
samsung_clk_register_mux(ctx, exynos4x12_mux_clks,
ARRAY_SIZE(exynos4x12_mux_clks));
@@ -1318,11 +1324,8 @@ static void __init exynos4_clk_init(struct device_node *np,
samsung_clk_register_fixed_factor(ctx,
exynos4x12_fixed_factor_clks,
ARRAY_SIZE(exynos4x12_fixed_factor_clks));
-
- exynos_register_cpu_clock(ctx, CLK_ARM_CLK, "armclk",
- hws[CLK_MOUT_APLL], hws[CLK_MOUT_MPLL_USER_C], 0x14200,
- e4412_armclk_d, ARRAY_SIZE(e4412_armclk_d),
- CLK_CPU_NEEDS_DEBUG_ALT_DIV | CLK_CPU_HAS_DIV1);
+ samsung_clk_register_cpu(ctx, exynos4412_cpu_clks,
+ ARRAY_SIZE(exynos4412_cpu_clks));
}

if (soc == EXYNOS4X12)
diff --git a/drivers/clk/samsung/clk-exynos5250.c b/drivers/clk/samsung/clk-exynos5250.c
index 06588fab408a..0baf28312231 100644
--- a/drivers/clk/samsung/clk-exynos5250.c
+++ b/drivers/clk/samsung/clk-exynos5250.c
@@ -772,6 +772,11 @@ static const struct exynos_cpuclk_cfg_data exynos5250_armclk_d[] __initconst = {
{ 0 },
};

+static const struct samsung_cpu_clock exynos5250_cpu_clks[] __initconst = {
+ CPU_CLK(CLK_ARM_CLK, "armclk", CLK_MOUT_APLL, CLK_MOUT_MPLL, CLK_CPU_HAS_DIV1, 0x200,
+ exynos5250_armclk_d),
+};
+
static const struct of_device_id ext_clk_match[] __initconst = {
{ .compatible = "samsung,clock-xxti", .data = (void *)0, },
{ },
@@ -782,7 +787,6 @@ static void __init exynos5250_clk_init(struct device_node *np)
{
struct samsung_clk_provider *ctx;
unsigned int tmp;
- struct clk_hw **hws;

if (np) {
reg_base = of_iomap(np, 0);
@@ -793,7 +797,6 @@ static void __init exynos5250_clk_init(struct device_node *np)
}

ctx = samsung_clk_init(np, reg_base, CLK_NR_CLKS);
- hws = ctx->clk_data.hws;

samsung_clk_of_register_fixed_ext(ctx, exynos5250_fixed_rate_ext_clks,
ARRAY_SIZE(exynos5250_fixed_rate_ext_clks),
@@ -822,10 +825,8 @@ static void __init exynos5250_clk_init(struct device_node *np)
ARRAY_SIZE(exynos5250_div_clks));
samsung_clk_register_gate(ctx, exynos5250_gate_clks,
ARRAY_SIZE(exynos5250_gate_clks));
- exynos_register_cpu_clock(ctx, CLK_ARM_CLK, "armclk",
- hws[CLK_MOUT_APLL], hws[CLK_MOUT_MPLL], 0x200,
- exynos5250_armclk_d, ARRAY_SIZE(exynos5250_armclk_d),
- CLK_CPU_HAS_DIV1);
+ samsung_clk_register_cpu(ctx, exynos5250_cpu_clks,
+ ARRAY_SIZE(exynos5250_cpu_clks));

/*
* Enable arm clock down (in idle) and set arm divider
diff --git a/drivers/clk/samsung/clk-exynos5420.c b/drivers/clk/samsung/clk-exynos5420.c
index 3ccd4eabd2a6..83607b384665 100644
--- a/drivers/clk/samsung/clk-exynos5420.c
+++ b/drivers/clk/samsung/clk-exynos5420.c
@@ -1551,6 +1551,20 @@ static const struct exynos_cpuclk_cfg_data exynos5420_kfcclk_d[] __initconst = {
{ 0 },
};

+static const struct samsung_cpu_clock exynos5420_cpu_clks[] __initconst = {
+ CPU_CLK(CLK_ARM_CLK, "armclk", CLK_MOUT_APLL, CLK_MOUT_MSPLL_CPU, 0, 0x200,
+ exynos5420_eglclk_d),
+ CPU_CLK(CLK_KFC_CLK, "kfcclk", CLK_MOUT_KPLL, CLK_MOUT_MSPLL_KFC, 0, 0x28200,
+ exynos5420_kfcclk_d),
+};
+
+static const struct samsung_cpu_clock exynos5800_cpu_clks[] __initconst = {
+ CPU_CLK(CLK_ARM_CLK, "armclk", CLK_MOUT_APLL, CLK_MOUT_MSPLL_CPU, 0, 0x200,
+ exynos5800_eglclk_d),
+ CPU_CLK(CLK_KFC_CLK, "kfcclk", CLK_MOUT_KPLL, CLK_MOUT_MSPLL_KFC, 0, 0x28200,
+ exynos5420_kfcclk_d),
+};
+
static const struct of_device_id ext_clk_match[] __initconst = {
{ .compatible = "samsung,exynos5420-oscclk", .data = (void *)0, },
{ },
@@ -1625,17 +1639,12 @@ static void __init exynos5x_clk_init(struct device_node *np,
}

if (soc == EXYNOS5420) {
- exynos_register_cpu_clock(ctx, CLK_ARM_CLK, "armclk",
- hws[CLK_MOUT_APLL], hws[CLK_MOUT_MSPLL_CPU], 0x200,
- exynos5420_eglclk_d, ARRAY_SIZE(exynos5420_eglclk_d), 0);
+ samsung_clk_register_cpu(ctx, exynos5420_cpu_clks,
+ ARRAY_SIZE(exynos5420_cpu_clks));
} else {
- exynos_register_cpu_clock(ctx, CLK_ARM_CLK, "armclk",
- hws[CLK_MOUT_APLL], hws[CLK_MOUT_MSPLL_CPU], 0x200,
- exynos5800_eglclk_d, ARRAY_SIZE(exynos5800_eglclk_d), 0);
+ samsung_clk_register_cpu(ctx, exynos5800_cpu_clks,
+ ARRAY_SIZE(exynos5800_cpu_clks));
}
- exynos_register_cpu_clock(ctx, CLK_KFC_CLK, "kfcclk",
- hws[CLK_MOUT_KPLL], hws[CLK_MOUT_MSPLL_KFC], 0x28200,
- exynos5420_kfcclk_d, ARRAY_SIZE(exynos5420_kfcclk_d), 0);

samsung_clk_extended_sleep_init(reg_base,
exynos5x_clk_regs, ARRAY_SIZE(exynos5x_clk_regs),
--
2.33.0.1079.g6e70778dc9-goog