Re: [PATCH v3 3/4] clk: rockchip: support more core div setting

Kever Yang <kever.yang@xxxxxxxxxxxxxx> · Fri, 5 Mar 2021 10:14:35 +0800

On 2021/3/1 下午2:47, Elaine Zhang wrote:
Use arrays to support more core independent div settings.
A55 supports each core to work at different frequencies, and each core
has an independent divider control.

Signed-off-by: Elaine Zhang <zhangqing@xxxxxxxxxxxxxx>

Patch looks good to me.

Reviewed-by: Kever Yang <kever.yang@xxxxxxxxxxxxxx>

Thanks,
- Kever
---
  drivers/clk/rockchip/clk-cpu.c    | 53 +++++++++++++++++--------------
  drivers/clk/rockchip/clk-px30.c   |  7 ++--
  drivers/clk/rockchip/clk-rk3036.c |  7 ++--
  drivers/clk/rockchip/clk-rk3128.c |  7 ++--
  drivers/clk/rockchip/clk-rk3188.c |  7 ++--
  drivers/clk/rockchip/clk-rk3228.c |  7 ++--
  drivers/clk/rockchip/clk-rk3288.c |  7 ++--
  drivers/clk/rockchip/clk-rk3308.c |  7 ++--
  drivers/clk/rockchip/clk-rk3328.c |  7 ++--
  drivers/clk/rockchip/clk-rk3368.c | 14 ++++----
  drivers/clk/rockchip/clk-rk3399.c | 14 ++++----
  drivers/clk/rockchip/clk-rv1108.c |  7 ++--
  drivers/clk/rockchip/clk.h        | 24 +++++++-------
  13 files changed, 94 insertions(+), 74 deletions(-)

diff --git a/drivers/clk/rockchip/clk-cpu.c b/drivers/clk/rockchip/clk-cpu.c
index fa9027fb1920..47288197c9d7 100644
--- a/drivers/clk/rockchip/clk-cpu.c
+++ b/drivers/clk/rockchip/clk-cpu.c
@@ -84,10 +84,10 @@ static unsigned long rockchip_cpuclk_recalc_rate(struct clk_hw *hw,
  {
  	struct rockchip_cpuclk *cpuclk = to_rockchip_cpuclk_hw(hw);
  	const struct rockchip_cpuclk_reg_data *reg_data = cpuclk->reg_data;
-	u32 clksel0 = readl_relaxed(cpuclk->reg_base + reg_data->core_reg);
+	u32 clksel0 = readl_relaxed(cpuclk->reg_base + reg_data->core_reg[0]);
  
-	clksel0 >>= reg_data->div_core_shift;
-	clksel0 &= reg_data->div_core_mask;
+	clksel0 >>= reg_data->div_core_shift[0];
+	clksel0 &= reg_data->div_core_mask[0];
  	return parent_rate / (clksel0 + 1);
  }
  
@@ -120,6 +120,7 @@ static int rockchip_cpuclk_pre_rate_change(struct rockchip_cpuclk *cpuclk,
  	const struct rockchip_cpuclk_rate_table *rate;
  	unsigned long alt_prate, alt_div;
  	unsigned long flags;
+	int i = 0;
  
  	/* check validity of the new rate */
  	rate = rockchip_get_cpuclk_settings(cpuclk, ndata->new_rate);
@@ -142,10 +143,10 @@ static int rockchip_cpuclk_pre_rate_change(struct rockchip_cpuclk *cpuclk,
  	if (alt_prate > ndata->old_rate) {
  		/* calculate dividers */
  		alt_div =  DIV_ROUND_UP(alt_prate, ndata->old_rate) - 1;
-		if (alt_div > reg_data->div_core_mask) {
+		if (alt_div > reg_data->div_core_mask[0]) {
  			pr_warn("%s: limiting alt-divider %lu to %d\n",
-				__func__, alt_div, reg_data->div_core_mask);
-			alt_div = reg_data->div_core_mask;
+				__func__, alt_div, reg_data->div_core_mask[0]);
+			alt_div = reg_data->div_core_mask[0];
  		}
  
  		/*
@@ -158,19 +159,17 @@ static int rockchip_cpuclk_pre_rate_change(struct rockchip_cpuclk *cpuclk,
  		pr_debug("%s: setting div %lu as alt-rate %lu > old-rate %lu\n",
  			 __func__, alt_div, alt_prate, ndata->old_rate);
  
-		writel(HIWORD_UPDATE(alt_div, reg_data->div_core_mask,
-					      reg_data->div_core_shift) |
-		       HIWORD_UPDATE(reg_data->mux_core_alt,
-				     reg_data->mux_core_mask,
-				     reg_data->mux_core_shift),
-		       cpuclk->reg_base + reg_data->core_reg);
-	} else {
-		/* select alternate parent */
-		writel(HIWORD_UPDATE(reg_data->mux_core_alt,
-				     reg_data->mux_core_mask,
-				     reg_data->mux_core_shift),
-		       cpuclk->reg_base + reg_data->core_reg);
+		for (i = 0; i < reg_data->num_cores; i++) {
+			writel(HIWORD_UPDATE(alt_div, reg_data->div_core_mask[i],
+					     reg_data->div_core_shift[i]),
+			       cpuclk->reg_base + reg_data->core_reg[i]);
+		}
  	}
+	/* select alternate parent */
+	writel(HIWORD_UPDATE(reg_data->mux_core_alt,
+			     reg_data->mux_core_mask,
+			     reg_data->mux_core_shift),
+	       cpuclk->reg_base + reg_data->core_reg[0]);
  
  	spin_unlock_irqrestore(cpuclk->lock, flags);
  	return 0;
@@ -182,6 +181,7 @@ static int rockchip_cpuclk_post_rate_change(struct rockchip_cpuclk *cpuclk,
  	const struct rockchip_cpuclk_reg_data *reg_data = cpuclk->reg_data;
  	const struct rockchip_cpuclk_rate_table *rate;
  	unsigned long flags;
+	int i = 0;
  
  	rate = rockchip_get_cpuclk_settings(cpuclk, ndata->new_rate);
  	if (!rate) {
@@ -202,12 +202,17 @@ static int rockchip_cpuclk_post_rate_change(struct rockchip_cpuclk *cpuclk,
  	 * primary parent by the extra dividers that were needed for the alt.
  	 */
  
-	writel(HIWORD_UPDATE(0, reg_data->div_core_mask,
-				reg_data->div_core_shift) |
-	       HIWORD_UPDATE(reg_data->mux_core_main,
-				reg_data->mux_core_mask,
-				reg_data->mux_core_shift),
-	       cpuclk->reg_base + reg_data->core_reg);
+	writel(HIWORD_UPDATE(reg_data->mux_core_main,
+			     reg_data->mux_core_mask,
+			     reg_data->mux_core_shift),
+	       cpuclk->reg_base + reg_data->core_reg[0]);
+
+	/* remove dividers */
+	for (i = 0; i < reg_data->num_cores; i++) {
+		writel(HIWORD_UPDATE(0, reg_data->div_core_mask[i],
+				     reg_data->div_core_shift[i]),
+		       cpuclk->reg_base + reg_data->core_reg[i]);
+	}
  
  	if (ndata->old_rate > ndata->new_rate)
  		rockchip_cpuclk_set_dividers(cpuclk, rate);
diff --git a/drivers/clk/rockchip/clk-px30.c b/drivers/clk/rockchip/clk-px30.c
index 6fb9c98b7d24..b58619eb412b 100644
--- a/drivers/clk/rockchip/clk-px30.c
+++ b/drivers/clk/rockchip/clk-px30.c
@@ -124,9 +124,10 @@ static struct rockchip_cpuclk_rate_table px30_cpuclk_rates[] __initdata = {
  };
  
  static const struct rockchip_cpuclk_reg_data px30_cpuclk_data = {
-	.core_reg = PX30_CLKSEL_CON(0),
-	.div_core_shift = 0,
-	.div_core_mask = 0xf,
+	.core_reg[0] = PX30_CLKSEL_CON(0),
+	.div_core_shift[0] = 0,
+	.div_core_mask[0] = 0xf,
+	.num_cores = 1,
  	.mux_core_alt = 1,
  	.mux_core_main = 0,
  	.mux_core_shift = 7,
diff --git a/drivers/clk/rockchip/clk-rk3036.c b/drivers/clk/rockchip/clk-rk3036.c
index 6a46f85ad837..91d56ad45817 100644
--- a/drivers/clk/rockchip/clk-rk3036.c
+++ b/drivers/clk/rockchip/clk-rk3036.c
@@ -102,9 +102,10 @@ static struct rockchip_cpuclk_rate_table rk3036_cpuclk_rates[] __initdata = {
  };
  
  static const struct rockchip_cpuclk_reg_data rk3036_cpuclk_data = {
-	.core_reg = RK2928_CLKSEL_CON(0),
-	.div_core_shift = 0,
-	.div_core_mask = 0x1f,
+	.core_reg[0] = RK2928_CLKSEL_CON(0),
+	.div_core_shift[0] = 0,
+	.div_core_mask[0] = 0x1f,
+	.num_cores = 1,
  	.mux_core_alt = 1,
  	.mux_core_main = 0,
  	.mux_core_shift = 7,
diff --git a/drivers/clk/rockchip/clk-rk3128.c b/drivers/clk/rockchip/clk-rk3128.c
index 4b1122e98e16..aa53797dbfc1 100644
--- a/drivers/clk/rockchip/clk-rk3128.c
+++ b/drivers/clk/rockchip/clk-rk3128.c
@@ -117,9 +117,10 @@ static struct rockchip_cpuclk_rate_table rk3128_cpuclk_rates[] __initdata = {
  };
  
  static const struct rockchip_cpuclk_reg_data rk3128_cpuclk_data = {
-	.core_reg = RK2928_CLKSEL_CON(0),
-	.div_core_shift = 0,
-	.div_core_mask = 0x1f,
+	.core_reg[0] = RK2928_CLKSEL_CON(0),
+	.div_core_shift[0] = 0,
+	.div_core_mask[0] = 0x1f,
+	.num_cores = 1,
  	.mux_core_alt = 1,
  	.mux_core_main = 0,
  	.mux_core_shift = 7,
diff --git a/drivers/clk/rockchip/clk-rk3188.c b/drivers/clk/rockchip/clk-rk3188.c
index 0b76ad34de00..ee6d48d147d5 100644
--- a/drivers/clk/rockchip/clk-rk3188.c
+++ b/drivers/clk/rockchip/clk-rk3188.c
@@ -145,9 +145,10 @@ static struct rockchip_cpuclk_rate_table rk3066_cpuclk_rates[] __initdata = {
  };
  
  static const struct rockchip_cpuclk_reg_data rk3066_cpuclk_data = {
-	.core_reg = RK2928_CLKSEL_CON(0),
-	.div_core_shift = 0,
-	.div_core_mask = 0x1f,
+	.core_reg[0] = RK2928_CLKSEL_CON(0),
+	.div_core_shift[0] = 0,
+	.div_core_mask[0] = 0x1f,
+	.num_cores = 1,
  	.mux_core_alt = 1,
  	.mux_core_main = 0,
  	.mux_core_shift = 8,
diff --git a/drivers/clk/rockchip/clk-rk3228.c b/drivers/clk/rockchip/clk-rk3228.c
index 47d6482dda9d..a24a35553e13 100644
--- a/drivers/clk/rockchip/clk-rk3228.c
+++ b/drivers/clk/rockchip/clk-rk3228.c
@@ -119,9 +119,10 @@ static struct rockchip_cpuclk_rate_table rk3228_cpuclk_rates[] __initdata = {
  };
  
  static const struct rockchip_cpuclk_reg_data rk3228_cpuclk_data = {
-	.core_reg = RK2928_CLKSEL_CON(0),
-	.div_core_shift = 0,
-	.div_core_mask = 0x1f,
+	.core_reg[0] = RK2928_CLKSEL_CON(0),
+	.div_core_shift[0] = 0,
+	.div_core_mask[0] = 0x1f,
+	.num_cores = 1,
  	.mux_core_alt = 1,
  	.mux_core_main = 0,
  	.mux_core_shift = 6,
diff --git a/drivers/clk/rockchip/clk-rk3288.c b/drivers/clk/rockchip/clk-rk3288.c
index 93c794695c46..baa5aebd3277 100644
--- a/drivers/clk/rockchip/clk-rk3288.c
+++ b/drivers/clk/rockchip/clk-rk3288.c
@@ -179,9 +179,10 @@ static struct rockchip_cpuclk_rate_table rk3288_cpuclk_rates[] __initdata = {
  };
  
  static const struct rockchip_cpuclk_reg_data rk3288_cpuclk_data = {
-	.core_reg = RK3288_CLKSEL_CON(0),
-	.div_core_shift = 8,
-	.div_core_mask = 0x1f,
+	.core_reg[0] = RK3288_CLKSEL_CON(0),
+	.div_core_shift[0] = 8,
+	.div_core_mask[0] = 0x1f,
+	.num_cores = 1,
  	.mux_core_alt = 1,
  	.mux_core_main = 0,
  	.mux_core_shift = 15,
diff --git a/drivers/clk/rockchip/clk-rk3308.c b/drivers/clk/rockchip/clk-rk3308.c
index 5bf15f2a44b7..2c3bd0c749f2 100644
--- a/drivers/clk/rockchip/clk-rk3308.c
+++ b/drivers/clk/rockchip/clk-rk3308.c
@@ -109,9 +109,10 @@ static struct rockchip_cpuclk_rate_table rk3308_cpuclk_rates[] __initdata = {
  };
  
  static const struct rockchip_cpuclk_reg_data rk3308_cpuclk_data = {
-	.core_reg = RK3308_CLKSEL_CON(0),
-	.div_core_shift = 0,
-	.div_core_mask = 0xf,
+	.core_reg[0] = RK3308_CLKSEL_CON(0),
+	.div_core_shift[0] = 0,
+	.div_core_mask[0] = 0xf,
+	.num_cores = 1,
  	.mux_core_alt = 1,
  	.mux_core_main = 0,
  	.mux_core_shift = 6,
diff --git a/drivers/clk/rockchip/clk-rk3328.c b/drivers/clk/rockchip/clk-rk3328.c
index 2429b7c2a8b3..267ab54937d3 100644
--- a/drivers/clk/rockchip/clk-rk3328.c
+++ b/drivers/clk/rockchip/clk-rk3328.c
@@ -130,9 +130,10 @@ static struct rockchip_cpuclk_rate_table rk3328_cpuclk_rates[] __initdata = {
  };
  
  static const struct rockchip_cpuclk_reg_data rk3328_cpuclk_data = {
-	.core_reg = RK3328_CLKSEL_CON(0),
-	.div_core_shift = 0,
-	.div_core_mask = 0x1f,
+	.core_reg[0] = RK3328_CLKSEL_CON(0),
+	.div_core_shift[0] = 0,
+	.div_core_mask[0] = 0x1f,
+	.num_cores = 1,
  	.mux_core_alt = 1,
  	.mux_core_main = 3,
  	.mux_core_shift = 6,
diff --git a/drivers/clk/rockchip/clk-rk3368.c b/drivers/clk/rockchip/clk-rk3368.c
index 9a0dab9448db..2c50cc2cc6db 100644
--- a/drivers/clk/rockchip/clk-rk3368.c
+++ b/drivers/clk/rockchip/clk-rk3368.c
@@ -154,9 +154,10 @@ static struct clk_div_table div_ddrphy_t[] = {
  #define IFLAGS ROCKCHIP_INVERTER_HIWORD_MASK
  
  static const struct rockchip_cpuclk_reg_data rk3368_cpuclkb_data = {
-	.core_reg = RK3368_CLKSEL_CON(0),
-	.div_core_shift = 0,
-	.div_core_mask = 0x1f,
+	.core_reg[0] = RK3368_CLKSEL_CON(0),
+	.div_core_shift[0] = 0,
+	.div_core_mask[0] = 0x1f,
+	.num_cores = 1,
  	.mux_core_alt = 1,
  	.mux_core_main = 0,
  	.mux_core_shift = 7,
@@ -164,11 +165,12 @@ static const struct rockchip_cpuclk_reg_data rk3368_cpuclkb_data = {
  };
  
  static const struct rockchip_cpuclk_reg_data rk3368_cpuclkl_data = {
-	.core_reg = RK3368_CLKSEL_CON(2),
-	.div_core_shift = 0,
+	.core_reg[0] = RK3368_CLKSEL_CON(2),
+	.div_core_shift[0] = 0,
  	.mux_core_alt = 1,
+	.num_cores = 1,
  	.mux_core_main = 0,
-	.div_core_mask = 0x1f,
+	.div_core_mask[0] = 0x1f,
  	.mux_core_shift = 7,
  	.mux_core_mask = 0x1,
  };
diff --git a/drivers/clk/rockchip/clk-rk3399.c b/drivers/clk/rockchip/clk-rk3399.c
index 7df2f1e00347..311ffb3308a8 100644
--- a/drivers/clk/rockchip/clk-rk3399.c
+++ b/drivers/clk/rockchip/clk-rk3399.c
@@ -291,9 +291,10 @@ static struct rockchip_clk_branch rk3399_pmuclk_wifi_fracmux __initdata =
  			RK3399_PMU_CLKSEL_CON(1), 14, 1, MFLAGS);
  
  static const struct rockchip_cpuclk_reg_data rk3399_cpuclkl_data = {
-	.core_reg = RK3399_CLKSEL_CON(0),
-	.div_core_shift = 0,
-	.div_core_mask = 0x1f,
+	.core_reg[0] = RK3399_CLKSEL_CON(0),
+	.div_core_shift[0] = 0,
+	.div_core_mask[0] = 0x1f,
+	.num_cores = 1,
  	.mux_core_alt = 3,
  	.mux_core_main = 0,
  	.mux_core_shift = 6,
@@ -301,9 +302,10 @@ static const struct rockchip_cpuclk_reg_data rk3399_cpuclkl_data = {
  };
  
  static const struct rockchip_cpuclk_reg_data rk3399_cpuclkb_data = {
-	.core_reg = RK3399_CLKSEL_CON(2),
-	.div_core_shift = 0,
-	.div_core_mask = 0x1f,
+	.core_reg[0] = RK3399_CLKSEL_CON(2),
+	.div_core_shift[0] = 0,
+	.div_core_mask[0] = 0x1f,
+	.num_cores = 1,
  	.mux_core_alt = 3,
  	.mux_core_main = 1,
  	.mux_core_shift = 6,
diff --git a/drivers/clk/rockchip/clk-rv1108.c b/drivers/clk/rockchip/clk-rv1108.c
index 5947d3192866..5f49af3c970a 100644
--- a/drivers/clk/rockchip/clk-rv1108.c
+++ b/drivers/clk/rockchip/clk-rv1108.c
@@ -106,9 +106,10 @@ static struct rockchip_cpuclk_rate_table rv1108_cpuclk_rates[] __initdata = {
  };
  
  static const struct rockchip_cpuclk_reg_data rv1108_cpuclk_data = {
-	.core_reg = RV1108_CLKSEL_CON(0),
-	.div_core_shift = 0,
-	.div_core_mask = 0x1f,
+	.core_reg[0] = RV1108_CLKSEL_CON(0),
+	.div_core_shift[0] = 0,
+	.div_core_mask[0] = 0x1f,
+	.num_cores = 1,
  	.mux_core_alt = 1,
  	.mux_core_main = 0,
  	.mux_core_shift = 8,
diff --git a/drivers/clk/rockchip/clk.h b/drivers/clk/rockchip/clk.h
index 2271a84124b0..7e60ac810101 100644
--- a/drivers/clk/rockchip/clk.h
+++ b/drivers/clk/rockchip/clk.h
@@ -323,6 +323,7 @@ struct rockchip_cpuclk_clksel {
  };
  
  #define ROCKCHIP_CPUCLK_NUM_DIVIDERS	2
+#define ROCKCHIP_CPUCLK_MAX_CORES	4
  struct rockchip_cpuclk_rate_table {
  	unsigned long prate;
  	struct rockchip_cpuclk_clksel divs[ROCKCHIP_CPUCLK_NUM_DIVIDERS];
@@ -330,22 +331,23 @@ struct rockchip_cpuclk_rate_table {
  
  /**
   * struct rockchip_cpuclk_reg_data - register offsets and masks of the cpuclock
- * @core_reg:		register offset of the core settings register
- * @div_core_shift:	core divider offset used to divide the pll value
- * @div_core_mask:	core divider mask
- * @mux_core_alt:	mux value to select alternate parent
+ * @core_reg[]:	register offset of the cores setting register
+ * @div_core_shift[]:	cores divider offset used to divide the pll value
+ * @div_core_mask[]:	cores divider mask
+ * @num_cores:	number of cpu cores
   * @mux_core_main:	mux value to select main parent of core
   * @mux_core_shift:	offset of the core multiplexer
   * @mux_core_mask:	core multiplexer mask
   */
  struct rockchip_cpuclk_reg_data {
-	int		core_reg;
-	u8		div_core_shift;
-	u32		div_core_mask;
-	u8		mux_core_alt;
-	u8		mux_core_main;
-	u8		mux_core_shift;
-	u32		mux_core_mask;
+	int	core_reg[ROCKCHIP_CPUCLK_MAX_CORES];
+	u8	div_core_shift[ROCKCHIP_CPUCLK_MAX_CORES];
+	u32	div_core_mask[ROCKCHIP_CPUCLK_MAX_CORES];
+	int	num_cores;
+	u8	mux_core_alt;
+	u8	mux_core_main;
+	u8	mux_core_shift;
+	u32	mux_core_mask;
  };
  
  struct clk *rockchip_clk_register_cpuclk(const char *name,








