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Message-ID: <7fe9aab5-73a2-6209-ae65-d955c426f745@linaro.org>
Date: Tue, 12 Jul 2022 11:44:29 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Yu Tu <yu.tu@...ogic.com>, linux-clk@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
Neil Armstrong <narmstrong@...libre.com>,
Jerome Brunet <jbrunet@...libre.com>,
Kevin Hilman <khilman@...libre.com>,
Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Subject: Re: [PATCH 3/3] clk: meson: s4: add s4 SoC clock controller driver
On 08/07/2022 08:27, Yu Tu wrote:
> Add the peripheral clock controller found in the s4 SoC family.
>
> Signed-off-by: Yu Tu <yu.tu@...ogic.com>
> ---
> MAINTAINERS | 2 +-
> drivers/clk/meson/Kconfig | 17 +
> drivers/clk/meson/Makefile | 1 +
> drivers/clk/meson/s4.c | 4678 ++++++++++++++++++++++++++++++++++++
> drivers/clk/meson/s4.h | 156 ++
> 5 files changed, 4853 insertions(+), 1 deletion(-)
> create mode 100644 drivers/clk/meson/s4.c
> create mode 100644 drivers/clk/meson/s4.h
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index e4ca46c5c8a1..f116ec0642f2 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -1772,7 +1772,7 @@ M: Jerome Brunet <jbrunet@...libre.com>
> L: linux-amlogic@...ts.infradead.org
> S: Maintained
> F: Documentation/devicetree/bindings/clock/amlogic*
> -F: drivers/clk/meson/
> +F: drivers/clk/meson/*
Why?
> F: include/dt-bindings/clock/gxbb*
> F: include/dt-bindings/clock/meson*
> F: include/dt-bindings/clock/s*
> diff --git a/drivers/clk/meson/Kconfig b/drivers/clk/meson/Kconfig
> index fc002c155bc3..1a344b0564e8 100644
> --- a/drivers/clk/meson/Kconfig
> +++ b/drivers/clk/meson/Kconfig
> @@ -115,4 +115,21 @@ config COMMON_CLK_G12A
> help
> Support for the clock controller on Amlogic S905D2, S905X2 and S905Y2
> devices, aka g12a. Say Y if you want peripherals to work.
> +
> +config COMMON_CLK_S4
> + tristate "S4 SoC clock controllers support"
> + depends on ARM64
> + default y
> + select COMMON_CLK_MESON_REGMAP
> + select HAVE_ARM_SMCCC
> + select COMMON_CLK_MESON_DUALDIV
> + select COMMON_CLK_MESON_MPLL
> + select COMMON_CLK_MESON_PLL
> + select COMMON_CLK_MESON_CPU_DYNDIV
> + select COMMON_CLK_MESON_VID_PLL_DIV
> + select MFD_SYSCON
> + help
> + Support for the clock controller on Amlogic S805X2 and S905Y4 devices,
> + aka s4. Amlogic S805X2 and S905Y4 devices include AQ222 and AQ229.
> + Say Y if you want peripherals and CPU frequency scaling to work.
> endmenu
> diff --git a/drivers/clk/meson/Makefile b/drivers/clk/meson/Makefile
> index 6eca2a406ee3..b3ef5f67820f 100644
> --- a/drivers/clk/meson/Makefile
> +++ b/drivers/clk/meson/Makefile
> @@ -19,3 +19,4 @@ obj-$(CONFIG_COMMON_CLK_AXG_AUDIO) += axg-audio.o
> obj-$(CONFIG_COMMON_CLK_GXBB) += gxbb.o gxbb-aoclk.o
> obj-$(CONFIG_COMMON_CLK_G12A) += g12a.o g12a-aoclk.o
> obj-$(CONFIG_COMMON_CLK_MESON8B) += meson8b.o meson8-ddr.o
> +obj-$(CONFIG_COMMON_CLK_S4) += s4.o
> diff --git a/drivers/clk/meson/s4.c b/drivers/clk/meson/s4.c
> new file mode 100644
> index 000000000000..a97159222f0e
> --- /dev/null
> +++ b/drivers/clk/meson/s4.c
> @@ -0,0 +1,4678 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Amlogic Meson-S4 Clock Controller Driver
> + *
> + * Copyright (c) 2021 Amlogic, inc.
> + * Author: Yu Tu <yu.tu@...ogic.com>
> + */
> +
> +#include <linux/clk-provider.h>
> +#include <linux/init.h>
> +#include <linux/of_device.h>
> +#include <linux/platform_device.h>
> +#include <linux/clk.h>
> +#include <linux/module.h>
> +#include <linux/of_address.h>
> +#include <dt-bindings/clock/s4-clkc.h>
> +
> +#include "clk-mpll.h"
> +#include "clk-pll.h"
> +#include "clk-regmap.h"
> +#include "vid-pll-div.h"
> +#include "clk-dualdiv.h"
> +#include "s4.h"
> +#include "meson-eeclk.h"
> +
> +static DEFINE_SPINLOCK(meson_clk_lock);
> +
> +static struct clk_regmap s4_fixed_pll_dco = {
None of these are const?
> + .data = &(struct meson_clk_pll_data){
> + .en = {
> + .reg_off = ANACTRL_FIXPLL_CTRL0,
> + .shift = 28,
> + .width = 1,
> + },
> + .m = {
> + .reg_off = ANACTRL_FIXPLL_CTRL0,
> + .shift = 0,
> + .width = 8,
> + },
> + .n = {
> + .reg_off = ANACTRL_FIXPLL_CTRL0,
> + .shift = 10,
> + .width = 5,
> + },
> + .frac = {
> + .reg_off = ANACTRL_FIXPLL_CTRL1,
> + .shift = 0,
> + .width = 17,
> + },
> + .l = {
> + .reg_off = ANACTRL_FIXPLL_CTRL0,
> + .shift = 31,
> + .width = 1,
> + },
> + .rst = {
> + .reg_off = ANACTRL_FIXPLL_CTRL0,
> + .shift = 29,
> + .width = 1,
> + },
> + },
> + .hw.init = &(struct clk_init_data){
> + .name = "fixed_pll_dco",
> + .ops = &meson_clk_pll_ro_ops,
> + .parent_data = (const struct clk_parent_data []) {
> + { .fw_name = "xtal", }
> + },
> + .num_parents = 1,
> + },
> +};
> +
> +static struct clk_regmap s4_fixed_pll = {
> + .data = &(struct clk_regmap_div_data){
> + .offset = ANACTRL_FIXPLL_CTRL0,
> + .shift = 16,
> + .width = 2,
> + .flags = CLK_DIVIDER_POWER_OF_TWO,
> + },
> + .hw.init = &(struct clk_init_data){
> + .name = "fixed_pll",
> + .ops = &clk_regmap_divider_ro_ops,
> + .parent_hws = (const struct clk_hw *[]) {
> + &s4_fixed_pll_dco.hw
> + },
> + .num_parents = 1,
> + /*
> + * This clock won't ever change at runtime so
> + * CLK_SET_RATE_PARENT is not required
> + */
> + },
> +};
> +
> +static struct clk_fixed_factor s4_fclk_div2_div = {
> + .mult = 1,
> + .div = 2,
> + .hw.init = &(struct clk_init_data){
> + .name = "fclk_div2_div",
> + .ops = &clk_fixed_factor_ops,
> + .parent_hws = (const struct clk_hw *[]) { &s4_fixed_pll.hw },
> + .num_parents = 1,
> + },
> +};
> +
> +static struct clk_regmap s4_fclk_div2 = {
> + .data = &(struct clk_regmap_gate_data){
> + .offset = ANACTRL_FIXPLL_CTRL1,
> + .bit_idx = 24,
> + },
> + .hw.init = &(struct clk_init_data){
> + .name = "fclk_div2",
> + .ops = &clk_regmap_gate_ops,
> + .parent_hws = (const struct clk_hw *[]) {
> + &s4_fclk_div2_div.hw
> + },
> + .num_parents = 1,
> + /*
> + * Similar to fclk_div3, it seems that this clock is used by
> + * the resident firmware and is required by the platform to
> + * operate correctly.
> + * Until the following condition are met, we need this clock to
> + * be marked as critical:
> + * a) Mark the clock used by a firmware resource, if possible
> + * b) CCF has a clock hand-off mechanism to make the sure the
> + * clock stays on until the proper driver comes along
> + */
> + .flags = CLK_IS_CRITICAL,
> + },
> +};
> +
> +static struct clk_fixed_factor s4_fclk_div3_div = {
> + .mult = 1,
> + .div = 3,
> + .hw.init = &(struct clk_init_data){
> + .name = "fclk_div3_div",
> + .ops = &clk_fixed_factor_ops,
> + .parent_hws = (const struct clk_hw *[]) { &s4_fixed_pll.hw },
> + .num_parents = 1,
> + },
> +};
> +
> +static struct clk_regmap s4_fclk_div3 = {
> + .data = &(struct clk_regmap_gate_data){
> + .offset = ANACTRL_FIXPLL_CTRL1,
> + .bit_idx = 20,
> + },
> + .hw.init = &(struct clk_init_data){
> + .name = "fclk_div3",
> + .ops = &clk_regmap_gate_ops,
> + .parent_hws = (const struct clk_hw *[]) {
> + &s4_fclk_div3_div.hw
> + },
> + .num_parents = 1,
> + /*
> + * This clock is used by the resident firmware and is required
> + * by the platform to operate correctly.
> + * Until the following condition are met, we need this clock to
> + * be marked as critical:
> + * a) Mark the clock used by a firmware resource, if possible
> + * b) CCF has a clock hand-off mechanism to make the sure the
> + * clock stays on until the proper driver comes along
> + */
> + .flags = CLK_IS_CRITICAL,
> + },
> +};
> +
> +static struct clk_fixed_factor s4_fclk_div4_div = {
> + .mult = 1,
> + .div = 4,
> + .hw.init = &(struct clk_init_data){
> + .name = "fclk_div4_div",
> + .ops = &clk_fixed_factor_ops,
> + .parent_hws = (const struct clk_hw *[]) { &s4_fixed_pll.hw },
> + .num_parents = 1,
> + },
> +};
> +
> +static struct clk_regmap s4_fclk_div4 = {
> + .data = &(struct clk_regmap_gate_data){
> + .offset = ANACTRL_FIXPLL_CTRL1,
> + .bit_idx = 21,
> + },
> + .hw.init = &(struct clk_init_data){
> + .name = "fclk_div4",
> + .ops = &clk_regmap_gate_ops,
> + .parent_hws = (const struct clk_hw *[]) {
> + &s4_fclk_div4_div.hw
> + },
> + .num_parents = 1,
> + },
> +};
> +
> +static struct clk_fixed_factor s4_fclk_div5_div = {
> + .mult = 1,
> + .div = 5,
> + .hw.init = &(struct clk_init_data){
> + .name = "fclk_div5_div",
> + .ops = &clk_fixed_factor_ops,
> + .parent_hws = (const struct clk_hw *[]) { &s4_fixed_pll.hw },
> + .num_parents = 1,
> + },
> +};
> +
> +static struct clk_regmap s4_fclk_div5 = {
> + .data = &(struct clk_regmap_gate_data){
> + .offset = ANACTRL_FIXPLL_CTRL1,
> + .bit_idx = 22,
> + },
> + .hw.init = &(struct clk_init_data){
> + .name = "fclk_div5",
> + .ops = &clk_regmap_gate_ops,
> + .parent_hws = (const struct clk_hw *[]) {
> + &s4_fclk_div5_div.hw
> + },
> + .num_parents = 1,
> + },
> +};
> +
> +static struct clk_fixed_factor s4_fclk_div7_div = {
> + .mult = 1,
> + .div = 7,
> + .hw.init = &(struct clk_init_data){
> + .name = "fclk_div7_div",
> + .ops = &clk_fixed_factor_ops,
> + .parent_hws = (const struct clk_hw *[]) { &s4_fixed_pll.hw },
> + .num_parents = 1,
> + },
> +};
> +
> +static struct clk_regmap s4_fclk_div7 = {
> + .data = &(struct clk_regmap_gate_data){
> + .offset = ANACTRL_FIXPLL_CTRL1,
> + .bit_idx = 23,
> + },
> + .hw.init = &(struct clk_init_data){
> + .name = "fclk_div7",
> + .ops = &clk_regmap_gate_ops,
> + .parent_hws = (const struct clk_hw *[]) {
> + &s4_fclk_div7_div.hw
> + },
> + .num_parents = 1,
> + },
> +};
> +
> +static struct clk_fixed_factor s4_fclk_div2p5_div = {
> + .mult = 2,
> + .div = 5,
> + .hw.init = &(struct clk_init_data){
> + .name = "fclk_div2p5_div",
> + .ops = &clk_fixed_factor_ops,
> + .parent_hws = (const struct clk_hw *[]) {
> + &s4_fixed_pll.hw
> + },
> + .num_parents = 1,
> + },
> +};
> +
> +static struct clk_regmap s4_fclk_div2p5 = {
> + .data = &(struct clk_regmap_gate_data){
> + .offset = ANACTRL_FIXPLL_CTRL1,
> + .bit_idx = 25,
> + },
> + .hw.init = &(struct clk_init_data){
> + .name = "fclk_div2p5",
> + .ops = &clk_regmap_gate_ops,
> + .parent_hws = (const struct clk_hw *[]) {
> + &s4_fclk_div2p5_div.hw
> + },
> + .num_parents = 1,
> + },
> +};
> +
> +static const struct pll_mult_range s4_gp0_pll_mult_range = {
Not const?
> + .min = 125,
> + .max = 250,
> +};
> +
(...)
> +/* Convenience table to populate regmap in .probe */
> +static struct clk_regmap *const s4_clk_regmaps[] = {
> + &s4_rtc_32k_by_oscin_clkin,
> + &s4_rtc_32k_by_oscin_div,
> + &s4_rtc_32k_by_oscin_sel,
> + &s4_rtc_32k_by_oscin,
> + &s4_rtc_clk,
> +
> + &s4_sysclk_b_sel,
> + &s4_sysclk_b_div,
> + &s4_sysclk_b,
> + &s4_sysclk_a_sel,
> + &s4_sysclk_a_div,
> + &s4_sysclk_a,
> + &s4_sys_clk,
> +
> + &s4_ceca_32k_clkin,
> + &s4_ceca_32k_div,
> + &s4_ceca_32k_sel_pre,
> + &s4_ceca_32k_sel,
> + &s4_ceca_32k_clkout,
> + &s4_cecb_32k_clkin,
> + &s4_cecb_32k_div,
> + &s4_cecb_32k_sel_pre,
> + &s4_cecb_32k_sel,
> + &s4_cecb_32k_clkout,
> +
> + &s4_sc_clk_mux,
> + &s4_sc_clk_div,
> + &s4_sc_clk_gate,
> +
> + &s4_12_24M_clk_gate,
> + &s4_12_24M_clk,
> + &s4_vid_pll_div,
> + &s4_vid_pll_sel,
> + &s4_vid_pll,
> + &s4_vclk_sel,
> + &s4_vclk2_sel,
> + &s4_vclk_input,
> + &s4_vclk2_input,
> + &s4_vclk_div,
> + &s4_vclk2_div,
> + &s4_vclk,
> + &s4_vclk2,
> + &s4_vclk_div1,
> + &s4_vclk_div2_en,
> + &s4_vclk_div4_en,
> + &s4_vclk_div6_en,
> + &s4_vclk_div12_en,
> + &s4_vclk2_div1,
> + &s4_vclk2_div2_en,
> + &s4_vclk2_div4_en,
> + &s4_vclk2_div6_en,
> + &s4_vclk2_div12_en,
> + &s4_cts_enci_sel,
> + &s4_cts_encp_sel,
> + &s4_cts_vdac_sel,
> + &s4_hdmi_tx_sel,
> + &s4_cts_enci,
> + &s4_cts_encp,
> + &s4_cts_vdac,
> + &s4_hdmi_tx,
> +
> + &s4_hdmi_sel,
> + &s4_hdmi_div,
> + &s4_hdmi,
> + &s4_ts_clk_div,
> + &s4_ts_clk_gate,
> +
> + &s4_mali_0_sel,
> + &s4_mali_0_div,
> + &s4_mali_0,
> + &s4_mali_1_sel,
> + &s4_mali_1_div,
> + &s4_mali_1,
> + &s4_mali_mux,
> +
> + &s4_vdec_p0_mux,
> + &s4_vdec_p0_div,
> + &s4_vdec_p0,
> + &s4_vdec_p1_mux,
> + &s4_vdec_p1_div,
> + &s4_vdec_p1,
> + &s4_vdec_mux,
> +
> + &s4_hevcf_p0_mux,
> + &s4_hevcf_p0_div,
> + &s4_hevcf_p0,
> + &s4_hevcf_p1_mux,
> + &s4_hevcf_p1_div,
> + &s4_hevcf_p1,
> + &s4_hevcf_mux,
> +
> + &s4_vpu_0_sel,
> + &s4_vpu_0_div,
> + &s4_vpu_0,
> + &s4_vpu_1_sel,
> + &s4_vpu_1_div,
> + &s4_vpu_1,
> + &s4_vpu,
> + &s4_vpu_clkb_tmp_mux,
> + &s4_vpu_clkb_tmp_div,
> + &s4_vpu_clkb_tmp,
> + &s4_vpu_clkb_div,
> + &s4_vpu_clkb,
> + &s4_vpu_clkc_p0_mux,
> + &s4_vpu_clkc_p0_div,
> + &s4_vpu_clkc_p0,
> + &s4_vpu_clkc_p1_mux,
> + &s4_vpu_clkc_p1_div,
> + &s4_vpu_clkc_p1,
> + &s4_vpu_clkc_mux,
> +
> + &s4_vapb_0_sel,
> + &s4_vapb_0_div,
> + &s4_vapb_0,
> + &s4_vapb_1_sel,
> + &s4_vapb_1_div,
> + &s4_vapb_1,
> + &s4_vapb,
> + &s4_ge2d_gate,
> +
> + &s4_hdcp22_esmclk_mux,
> + &s4_hdcp22_esmclk_div,
> + &s4_hdcp22_esmclk_gate,
> + &s4_hdcp22_skpclk_mux,
> + &s4_hdcp22_skpclk_div,
> + &s4_hdcp22_skpclk_gate,
> +
> + &s4_vdin_meas_mux,
> + &s4_vdin_meas_div,
> + &s4_vdin_meas_gate,
> +
> + &s4_sd_emmc_c_clk0_sel,
> + &s4_sd_emmc_c_clk0_div,
> + &s4_sd_emmc_c_clk0,
> + &s4_sd_emmc_a_clk0_sel,
> + &s4_sd_emmc_a_clk0_div,
> + &s4_sd_emmc_a_clk0,
> + &s4_sd_emmc_b_clk0_sel,
> + &s4_sd_emmc_b_clk0_div,
> + &s4_sd_emmc_b_clk0,
> +
> + &s4_spicc0_mux,
> + &s4_spicc0_div,
> + &s4_spicc0_gate,
> +
> + &s4_pwm_a_mux,
> + &s4_pwm_a_div,
> + &s4_pwm_a_gate,
> + &s4_pwm_b_mux,
> + &s4_pwm_b_div,
> + &s4_pwm_b_gate,
> + &s4_pwm_c_mux,
> + &s4_pwm_c_div,
> + &s4_pwm_c_gate,
> + &s4_pwm_d_mux,
> + &s4_pwm_d_div,
> + &s4_pwm_d_gate,
> + &s4_pwm_e_mux,
> + &s4_pwm_e_div,
> + &s4_pwm_e_gate,
> + &s4_pwm_f_mux,
> + &s4_pwm_f_div,
> + &s4_pwm_f_gate,
> + &s4_pwm_g_mux,
> + &s4_pwm_g_div,
> + &s4_pwm_g_gate,
> + &s4_pwm_h_mux,
> + &s4_pwm_h_div,
> + &s4_pwm_h_gate,
> + &s4_pwm_i_mux,
> + &s4_pwm_i_div,
> + &s4_pwm_i_gate,
> + &s4_pwm_j_mux,
> + &s4_pwm_j_div,
> + &s4_pwm_j_gate,
> +
> + &s4_saradc_mux,
> + &s4_saradc_div,
> + &s4_saradc_gate,
> +
> + &s4_gen_clk_sel,
> + &s4_gen_clk_div,
> + &s4_gen_clk,
> +
> + &s4_ddr,
> + &s4_dos,
> + &s4_ethphy,
> + &s4_mali,
> + &s4_aocpu,
> + &s4_aucpu,
> + &s4_cec,
> + &s4_sdemmca,
> + &s4_sdemmcb,
> + &s4_nand,
> + &s4_smartcard,
> + &s4_acodec,
> + &s4_spifc,
> + &s4_msr_clk,
> + &s4_ir_ctrl,
> + &s4_audio,
> + &s4_eth,
> + &s4_uart_a,
> + &s4_uart_b,
> + &s4_uart_c,
> + &s4_uart_d,
> + &s4_uart_e,
> + &s4_aififo,
> + &s4_ts_ddr,
> + &s4_ts_pll,
> + &s4_g2d,
> + &s4_spicc0,
> + &s4_usb,
> + &s4_i2c_m_a,
> + &s4_i2c_m_b,
> + &s4_i2c_m_c,
> + &s4_i2c_m_d,
> + &s4_i2c_m_e,
> + &s4_hdmitx_apb,
> + &s4_i2c_s_a,
> + &s4_usb1_to_ddr,
> + &s4_hdcp22,
> + &s4_mmc_apb,
> + &s4_rsa,
> + &s4_cpu_debug,
> + &s4_vpu_intr,
> + &s4_demod,
> + &s4_sar_adc,
> + &s4_gic,
> + &s4_pwm_ab,
> + &s4_pwm_cd,
> + &s4_pwm_ef,
> + &s4_pwm_gh,
> + &s4_pwm_ij,
> + &s4_demod_core_clk_mux,
> + &s4_demod_core_clk_div,
> + &s4_demod_core_clk_gate,
> + &s4_adc_extclk_in_mux,
> + &s4_adc_extclk_in_div,
> + &s4_adc_extclk_in_gate,
> +
> + &s4_fixed_pll_dco,
> + &s4_fixed_pll,
> + &s4_fclk_div2,
> + &s4_fclk_div3,
> + &s4_fclk_div4,
> + &s4_fclk_div5,
> + &s4_fclk_div7,
> + &s4_fclk_div2p5,
> + &s4_gp0_pll_dco,
> + &s4_gp0_pll,
> +
> + &s4_hifi_pll_dco,
> + &s4_hifi_pll,
> + &s4_hdmi_pll_dco,
> + &s4_hdmi_pll_od,
> + &s4_hdmi_pll,
> + &s4_mpll_50m,
> + &s4_mpll0_div,
> + &s4_mpll0,
> + &s4_mpll1_div,
> + &s4_mpll1,
> + &s4_mpll2_div,
> + &s4_mpll2,
> + &s4_mpll3_div,
> + &s4_mpll3,
> +};
> +
> +static const struct reg_sequence s4_init_regs[] = {
> + { .reg = ANACTRL_MPLL_CTRL0, .def = 0x00000543 },
> +};
> +
> +static const struct meson_eeclkc_data s4_clkc_data = {
> + .regmap_clks = s4_clk_regmaps,
> + .regmap_clk_num = ARRAY_SIZE(s4_clk_regmaps),
> + .hw_onecell_data = &s4_hw_onecell_data,
> + .init_regs = s4_init_regs,
> + .init_count = ARRAY_SIZE(s4_init_regs),
> +};
> +
> +static const struct of_device_id clkc_match_table[] = {
> + {
> + .compatible = "amlogic,s4-clkc",
> + .data = &s4_clkc_data
> + },
> + {}
> +};
> +
> +static struct platform_driver s4_driver = {
> + .probe = meson_eeclkc_probe,
> + .driver = {
> + .name = "s4-clkc",
> + .of_match_table = clkc_match_table,
> + },
> +};
> +
> +module_platform_driver(s4_driver);
> +MODULE_LICENSE("GPL");
> diff --git a/drivers/clk/meson/s4.h b/drivers/clk/meson/s4.h
> new file mode 100644
> index 000000000000..d5563dcbd52e
> --- /dev/null
> +++ b/drivers/clk/meson/s4.h
> @@ -0,0 +1,156 @@
> +/* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */
> +/*
> + * Copyright (c) 2021 Amlogic, inc.
> + * Author: Yu Tu <yu.tu@...ogic.com>
> + */
> +
> +#ifndef __S4_H
> +#define __S4_H
> +
> +/*
> + * Clock controller register offsets
> + * REG_BASE: REGISTER_BASE_ADDR = 0xfe000000
> + */
> +#define CLKCTRL_OSCIN_CTRL ((0x0001 << 2))
No need for double ((
> +#define CLKCTRL_RTC_BY_OSCIN_CTRL0 ((0x0002 << 2))
> +#define CLKCTRL_RTC_BY_OSCIN_CTRL1 ((0x0003 << 2))
Best regards,
Krzysztof
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