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Date: Tue, 19 Mar 2019 10:38:19 +0100
From: Jerome Brunet <jbrunet@...libre.com>
To: Neil Armstrong <narmstrong@...libre.com>
Cc: linux-clk@...r.kernel.org, linux-amlogic@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] clk: meson: g12a: add cpu clocks
On Mon, 2019-03-04 at 14:11 +0100, Neil Armstrong wrote:
> Add the Amlogic G12A Family CPU Clock tree in read/only for now.
>
> The CPU clock can either use the SYS_PLL for > 1GHz frequencies or
> use a couple of div+mux from 1GHz/667MHz/24MHz source with 2 non-glitch
> muxes.
>
> Proper DVFS support will come in a second time.
>
> Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
> ---
> drivers/clk/meson/g12a.c | 350 +++++++++++++++++++++++++++++++++++++++
> drivers/clk/meson/g12a.h | 22 ++-
> 2 files changed, 371 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/clk/meson/g12a.c b/drivers/clk/meson/g12a.c
> index 0e1ce8c03259..80a7172df2a6 100644
> --- a/drivers/clk/meson/g12a.c
> +++ b/drivers/clk/meson/g12a.c
> @@ -150,6 +150,318 @@ static struct clk_regmap g12a_sys_pll = {
> },
> };
>
> +static struct clk_regmap g12a_sys_pll_div16_en = {
> + .data = &(struct clk_regmap_gate_data){
> + .offset = HHI_SYS_CPU_CLK_CNTL1,
> + .bit_idx = 24,
> + },
> + .hw.init = &(struct clk_init_data) {
> + .name = "sys_pll_div16_en",
> + .ops = &clk_regmap_gate_ro_ops,
> + .parent_names = (const char *[]){ "sys_pll" },
> + .num_parents = 1,
> + /*
> + * This clock is used to debug the sys_pll range
> + * Linux should not change it at runtime
> + */
> + },
> +};
> +
> +static struct clk_fixed_factor g12a_sys_pll_div16 = {
> + .mult = 1,
> + .div = 16,
> + .hw.init = &(struct clk_init_data){
> + .name = "sys_pll_div16",
> + .ops = &clk_fixed_factor_ops,
> + .parent_names = (const char *[]){ "sys_pll_div16_en" },
> + .num_parents = 1,
> + },
> +};
> +
> +/* Datasheet names this field as "premux0" */
> +static struct clk_regmap g12a_cpu_clk_dyn0_sel = {
called premux0 so g12a_cpu_clk_premux0 ?
> + .data = &(struct clk_regmap_mux_data){
> + .offset = HHI_SYS_CPU_CLK_CNTL0,
> + .mask = 0x3,
> + .shift = 0,
> + },
> + .hw.init = &(struct clk_init_data){
> + .name = "cpu_clk_dyn0_sel",
> + .ops = &clk_regmap_mux_ro_ops,
> + .parent_names = (const char *[]){ IN_PREFIX "xtal",
> + "fclk_div2",
> + "fclk_div3" },
> + .num_parents = 3,
> + },
> +};
> +
> +/* Datasheet names this field as "mux0_divn_tcnt" */
> +static struct clk_regmap g12a_cpu_clk_dyn0_div = {
g12a_cpu_clk_mux0_div ?
> + .data = &(struct clk_regmap_div_data){
> + .offset = HHI_SYS_CPU_CLK_CNTL0,
> + .shift = 4,
> + .width = 6,
> + },
> + .hw.init = &(struct clk_init_data){
> + .name = "cpu_clk_dyn0_div",
> + .ops = &clk_regmap_divider_ro_ops,
> + .parent_names = (const char *[]){ "cpu_clk_dyn0_sel" },
> + .num_parents = 1,
> + },
> +};
> +
> +/* Datasheet names this field as "postmux0" */
> +static struct clk_regmap g12a_cpu_clk_dyn0 = {
g12a_cpu_clk_postmux0 ?
> + .data = &(struct clk_regmap_mux_data){
> + .offset = HHI_SYS_CPU_CLK_CNTL0,
> + .mask = 0x1,
> + .shift = 2,
> + },
> + .hw.init = &(struct clk_init_data){
> + .name = "cpu_clk_dyn0",
> + .ops = &clk_regmap_mux_ro_ops,
> + .parent_names = (const char *[]){ "cpu_clk_dyn0_sel",
> + "cpu_clk_dyn0_div" },
> + .num_parents = 2,
> + },
> +};
> +
> +/* Datasheet names this field as "premux1" */
> +static struct clk_regmap g12a_cpu_clk_dyn1_sel = {
> + .data = &(struct clk_regmap_mux_data){
> + .offset = HHI_SYS_CPU_CLK_CNTL0,
> + .mask = 0x3,
> + .shift = 16,
> + },
> + .hw.init = &(struct clk_init_data){
> + .name = "cpu_clk_dyn1_sel",
> + .ops = &clk_regmap_mux_ro_ops,
> + .parent_names = (const char *[]){ IN_PREFIX "xtal",
> + "fclk_div2",
> + "fclk_div3" },
> + .num_parents = 3,
> + },
> +};
> +
> +/* Datasheet names this field as "Mux1_divn_tcnt" */
> +static struct clk_regmap g12a_cpu_clk_dyn1_div = {
> + .data = &(struct clk_regmap_div_data){
> + .offset = HHI_SYS_CPU_CLK_CNTL0,
> + .shift = 20,
> + .width = 6,
> + },
> + .hw.init = &(struct clk_init_data){
> + .name = "cpu_clk_dyn1_div",
> + .ops = &clk_regmap_divider_ro_ops,
> + .parent_names = (const char *[]){ "cpu_clk_dyn1_sel" },
> + .num_parents = 1,
> + },
> +};
> +
> +/* Datasheet names this field as "postmux1" */
> +static struct clk_regmap g12a_cpu_clk_dyn1 = {
> + .data = &(struct clk_regmap_mux_data){
> + .offset = HHI_SYS_CPU_CLK_CNTL0,
> + .mask = 0x1,
> + .shift = 18,
> + },
> + .hw.init = &(struct clk_init_data){
> + .name = "cpu_clk_dyn1",
> + .ops = &clk_regmap_mux_ro_ops,
> + .parent_names = (const char *[]){ "cpu_clk_dyn1_sel",
> + "cpu_clk_dyn1_div" },
> + .num_parents = 2,
> + },
> +};
> +
> +/* Datasheet names this field as "Final_dyn_mux_sel" */
> +static struct clk_regmap g12a_cpu_clk_dyn = {
> + .data = &(struct clk_regmap_mux_data){
> + .offset = HHI_SYS_CPU_CLK_CNTL0,
> + .mask = 0x1,
> + .shift = 10,
> + },
> + .hw.init = &(struct clk_init_data){
> + .name = "cpu_clk_dyn",
> + .ops = &clk_regmap_mux_ro_ops,
> + .parent_names = (const char *[]){ "cpu_clk_dyn0",
> + "cpu_clk_dyn1" },
> + .num_parents = 2,
> + },
> +};
> +
> +/* Datasheet names this field as "Final_mux_sel" */
> +static struct clk_regmap g12a_cpu_clk = {
> + .data = &(struct clk_regmap_mux_data){
> + .offset = HHI_SYS_CPU_CLK_CNTL0,
> + .mask = 0x1,
> + .shift = 11,
> + },
> + .hw.init = &(struct clk_init_data){
> + .name = "cpu_clk",
> + .ops = &clk_regmap_mux_ro_ops,
> + .parent_names = (const char *[]){ "cpu_clk_dyn",
> + "sys_pll" },
> + .num_parents = 2,
> + },
> +};
> +
> +static struct clk_regmap g12a_cpu_clk_div16_en = {
> + .data = &(struct clk_regmap_gate_data){
> + .offset = HHI_SYS_CPU_CLK_CNTL1,
> + .bit_idx = 1,
> + },
> + .hw.init = &(struct clk_init_data) {
> + .name = "cpu_clk_div16_en",
> + .ops = &clk_regmap_gate_ro_ops,
> + .parent_names = (const char *[]){ "cpu_clk" },
> + .num_parents = 1,
> + /*
> + * This clock is used to debug the cpu_clk range
> + * Linux should not change it at runtime
> + */
> + },
> +};
> +
> +static struct clk_fixed_factor g12a_cpu_clk_div16 = {
> + .mult = 1,
> + .div = 16,
> + .hw.init = &(struct clk_init_data){
> + .name = "cpu_clk_div16",
> + .ops = &clk_fixed_factor_ops,
> + .parent_names = (const char *[]){ "cpu_clk_div16_en" },
> + .num_parents = 1,
> + },
> +};
> +
> +static struct clk_regmap g12a_cpu_clk_apb_div = {
> + .data = &(struct clk_regmap_div_data){
> + .offset = HHI_SYS_CPU_CLK_CNTL1,
> + .shift = 3,
> + .width = 3,
> + .flags = CLK_DIVIDER_POWER_OF_TWO,
> + },
> + .hw.init = &(struct clk_init_data){
> + .name = "cpu_clk_apb_div",
> + .ops = &clk_regmap_divider_ro_ops,
> + .parent_names = (const char *[]){ "cpu_clk" },
> + .num_parents = 1,
> + },
> +};
> +
> +static struct clk_regmap g12a_cpu_clk_apb = {
> + .data = &(struct clk_regmap_gate_data){
> + .offset = HHI_SYS_CPU_CLK_CNTL1,
> + .bit_idx = 1,
> + },
> + .hw.init = &(struct clk_init_data) {
> + .name = "cpu_clk_apb",
> + .ops = &clk_regmap_gate_ro_ops,
> + .parent_names = (const char *[]){ "cpu_clk_apb_div" },
> + .num_parents = 1,
> + /*
> + * This clock is set by the ROM monitor code,
> + * Linux should not change it at runtime
> + */
> + },
> +};
> +
> +static struct clk_regmap g12a_cpu_clk_atb_div = {
> + .data = &(struct clk_regmap_div_data){
> + .offset = HHI_SYS_CPU_CLK_CNTL1,
> + .shift = 6,
> + .width = 3,
> + .flags = CLK_DIVIDER_POWER_OF_TWO,
> + },
> + .hw.init = &(struct clk_init_data){
> + .name = "cpu_clk_atb_div",
> + .ops = &clk_regmap_divider_ro_ops,
> + .parent_names = (const char *[]){ "cpu_clk" },
> + .num_parents = 1,
> + },
> +};
> +
> +static struct clk_regmap g12a_cpu_clk_atb = {
> + .data = &(struct clk_regmap_gate_data){
> + .offset = HHI_SYS_CPU_CLK_CNTL1,
> + .bit_idx = 17,
> + },
> + .hw.init = &(struct clk_init_data) {
> + .name = "cpu_clk_atb",
> + .ops = &clk_regmap_gate_ro_ops,
> + .parent_names = (const char *[]){ "cpu_clk_atb_div" },
> + .num_parents = 1,
> + /*
> + * This clock is set by the ROM monitor code,
> + * Linux should not change it at runtime
> + */
> + },
> +};
> +
> +static struct clk_regmap g12a_cpu_clk_axi_div = {
> + .data = &(struct clk_regmap_div_data){
> + .offset = HHI_SYS_CPU_CLK_CNTL1,
> + .shift = 9,
> + .width = 3,
> + .flags = CLK_DIVIDER_POWER_OF_TWO,
> + },
> + .hw.init = &(struct clk_init_data){
> + .name = "cpu_clk_axi_div",
> + .ops = &clk_regmap_divider_ro_ops,
> + .parent_names = (const char *[]){ "cpu_clk" },
> + .num_parents = 1,
> + },
> +};
> +
> +static struct clk_regmap g12a_cpu_clk_axi = {
> + .data = &(struct clk_regmap_gate_data){
> + .offset = HHI_SYS_CPU_CLK_CNTL1,
> + .bit_idx = 18,
> + },
> + .hw.init = &(struct clk_init_data) {
> + .name = "cpu_clk_axi",
> + .ops = &clk_regmap_gate_ro_ops,
> + .parent_names = (const char *[]){ "cpu_clk_axi_div" },
> + .num_parents = 1,
> + /*
> + * This clock is set by the ROM monitor code,
> + * Linux should not change it at runtime
> + */
> + },
> +};
> +
> +static struct clk_regmap g12a_cpu_clk_trace_div = {
> + .data = &(struct clk_regmap_div_data){
> + .offset = HHI_SYS_CPU_CLK_CNTL1,
> + .shift = 20,
> + .width = 3,
> + .flags = CLK_DIVIDER_POWER_OF_TWO,
> + },
> + .hw.init = &(struct clk_init_data){
> + .name = "cpu_clk_trace_div",
> + .ops = &clk_regmap_divider_ro_ops,
> + .parent_names = (const char *[]){ "cpu_clk" },
> + .num_parents = 1,
> + },
> +};
> +
> +static struct clk_regmap g12a_cpu_clk_trace = {
> + .data = &(struct clk_regmap_gate_data){
> + .offset = HHI_SYS_CPU_CLK_CNTL1,
> + .bit_idx = 23,
> + },
> + .hw.init = &(struct clk_init_data) {
> + .name = "cpu_clk_trace",
> + .ops = &clk_regmap_gate_ro_ops,
> + .parent_names = (const char *[]){ "cpu_clk_trace_div" },
> + .num_parents = 1,
> + /*
> + * This clock is set by the ROM monitor code,
> + * Linux should not change it at runtime
> + */
> + },
> +};
> +
> static const struct pll_mult_range g12a_gp0_pll_mult_range = {
> .min = 55,
> .max = 255,
> @@ -2167,6 +2479,26 @@ static struct clk_hw_onecell_data g12a_hw_onecell_data = {
> [CLKID_MALI] = &g12a_mali.hw,
> [CLKID_MPLL_5OM_DIV] = &g12a_mpll_50m_div.hw,
> [CLKID_MPLL_5OM] = &g12a_mpll_50m.hw,
> + [CLKID_SYS_PLL_DIV16_EN] = &g12a_sys_pll_div16_en.hw,
> + [CLKID_SYS_PLL_DIV16] = &g12a_sys_pll_div16.hw,
> + [CLKID_CPU_CLK_DYN0_SEL] = &g12a_cpu_clk_dyn0_sel.hw,
> + [CLKID_CPU_CLK_DYN0_DIV] = &g12a_cpu_clk_dyn0_div.hw,
> + [CLKID_CPU_CLK_DYN0] = &g12a_cpu_clk_dyn0.hw,
> + [CLKID_CPU_CLK_DYN1_SEL] = &g12a_cpu_clk_dyn1_sel.hw,
> + [CLKID_CPU_CLK_DYN1_DIV] = &g12a_cpu_clk_dyn1_div.hw,
> + [CLKID_CPU_CLK_DYN1] = &g12a_cpu_clk_dyn1.hw,
> + [CLKID_CPU_CLK_DYN] = &g12a_cpu_clk_dyn.hw,
> + [CLKID_CPU_CLK] = &g12a_cpu_clk.hw,
> + [CLKID_CPU_CLK_DIV16_EN] = &g12a_cpu_clk_div16_en.hw,
> + [CLKID_CPU_CLK_DIV16] = &g12a_cpu_clk_div16.hw,
> + [CLKID_CPU_CLK_APB_DIV] = &g12a_cpu_clk_apb_div.hw,
> + [CLKID_CPU_CLK_APB] = &g12a_cpu_clk_apb.hw,
> + [CLKID_CPU_CLK_ATB_DIV] = &g12a_cpu_clk_atb_div.hw,
> + [CLKID_CPU_CLK_ATB] = &g12a_cpu_clk_atb.hw,
> + [CLKID_CPU_CLK_AXI_DIV] = &g12a_cpu_clk_axi_div.hw,
> + [CLKID_CPU_CLK_AXI] = &g12a_cpu_clk_axi.hw,
> + [CLKID_CPU_CLK_TRACE_DIV] = &g12a_cpu_clk_trace_div.hw,
> + [CLKID_CPU_CLK_TRACE] = &g12a_cpu_clk_trace.hw,
> [NR_CLKS] = NULL,
> },
> .num = NR_CLKS,
> @@ -2335,6 +2667,24 @@ static struct clk_regmap *const g12a_clk_regmaps[] = {
> &g12a_mali_1,
> &g12a_mali,
> &g12a_mpll_50m,
> + &g12a_sys_pll_div16_en,
> + &g12a_cpu_clk_dyn0_sel,
> + &g12a_cpu_clk_dyn0_div,
> + &g12a_cpu_clk_dyn0,
> + &g12a_cpu_clk_dyn1_sel,
> + &g12a_cpu_clk_dyn1_div,
> + &g12a_cpu_clk_dyn1,
> + &g12a_cpu_clk_dyn,
> + &g12a_cpu_clk,
> + &g12a_cpu_clk_div16_en,
> + &g12a_cpu_clk_apb_div,
> + &g12a_cpu_clk_apb,
> + &g12a_cpu_clk_atb_div,
> + &g12a_cpu_clk_atb,
> + &g12a_cpu_clk_axi_div,
> + &g12a_cpu_clk_axi,
> + &g12a_cpu_clk_trace_div,
> + &g12a_cpu_clk_trace,
> };
>
> static const struct meson_eeclkc_data g12a_clkc_data = {
> diff --git a/drivers/clk/meson/g12a.h b/drivers/clk/meson/g12a.h
> index f399dfe1401c..70aa469ca1cf 100644
> --- a/drivers/clk/meson/g12a.h
> +++ b/drivers/clk/meson/g12a.h
> @@ -50,6 +50,7 @@
> #define HHI_GCLK_MPEG2 0x148
> #define HHI_GCLK_OTHER 0x150
> #define HHI_GCLK_OTHER2 0x154
> +#define HHI_SYS_CPU_CLK_CNTL1 0x15c
> #define HHI_VID_CLK_DIV 0x164
> #define HHI_MPEG_CLK_CNTL 0x174
> #define HHI_AUD_CLK_CNTL 0x178
> @@ -166,8 +167,27 @@
> #define CLKID_MALI_0_DIV 170
> #define CLKID_MALI_1_DIV 173
> #define CLKID_MPLL_5OM_DIV 176
> +#define CLKID_SYS_PLL_DIV16_EN 178
> +#define CLKID_SYS_PLL_DIV16 179
> +#define CLKID_CPU_CLK_DYN0_SEL 180
> +#define CLKID_CPU_CLK_DYN0_DIV 181
> +#define CLKID_CPU_CLK_DYN0 182
> +#define CLKID_CPU_CLK_DYN1_SEL 183
> +#define CLKID_CPU_CLK_DYN1_DIV 184
> +#define CLKID_CPU_CLK_DYN1 185
> +#define CLKID_CPU_CLK_DYN 186
> +#define CLKID_CPU_CLK_DIV16_EN 188
> +#define CLKID_CPU_CLK_DIV16 189
> +#define CLKID_CPU_CLK_APB_DIV 190
> +#define CLKID_CPU_CLK_APB 191
> +#define CLKID_CPU_CLK_ATB_DIV 192
> +#define CLKID_CPU_CLK_ATB 193
> +#define CLKID_CPU_CLK_AXI_DIV 194
> +#define CLKID_CPU_CLK_AXI 195
> +#define CLKID_CPU_CLK_TRACE_DIV 196
> +#define CLKID_CPU_CLK_TRACE 197
>
> -#define NR_CLKS 178
> +#define NR_CLKS 198
>
> /* include the CLKIDs that have been made part of the DT binding */
> #include <dt-bindings/clock/g12a-clkc.h>
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