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Message-ID: <2bc0f6c5-a7b9-8fcc-fc5c-a6a576392789@rock-chips.com>
Date: Fri, 5 Mar 2021 10:14:35 +0800
From: Kever Yang <kever.yang@...k-chips.com>
To: Elaine Zhang <zhangqing@...k-chips.com>, mturquette@...libre.com,
robh+dt@...nel.org, sboyd@...nel.org, heiko@...ech.de
Cc: devicetree@...r.kernel.org, linux-clk@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
cl@...k-chips.com, huangtao@...k-chips.com,
tony.xie@...k-chips.com, finley.xiao@...k-chips.com
Subject: Re: [PATCH v3 3/4] clk: rockchip: support more core div setting
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@...k-chips.com>
Patch looks good to me.
Reviewed-by: Kever Yang <kever.yang@...k-chips.com>
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,
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