Re: [PATCH v2 3/3] clk: meson: a1: add support for Amlogic A1 clock driver

Jian Hu
2019-10-25T11:33:08Z

Hi, Jerome

Thanks for your review

On 2019/10/21 19:41, Jerome Brunet wrote:
>
> On Fri 18 Oct 2019 at 09:14, Jian Hu <jian.hu@amlogic.com> wrote:
>
>> The Amlogic A1 clock includes three drivers:
>> peripheral clocks, pll clocks, CPU clocks.
>> sys pll and CPU clocks will be sent in next patch.
>>
>> Unlike the previous series, there is no EE/AO domain
>> in A1 CLK controllers.
>>
>> Signed-off-by: Jian Hu <jian.hu@amlogic.com>
>> ---
>> drivers/clk/meson/Kconfig | 10 +
>> drivers/clk/meson/Makefile | 1 +
>> drivers/clk/meson/a1-pll.c | 345 +++++++
>> drivers/clk/meson/a1-pll.h | 56 ++
>> drivers/clk/meson/a1.c | 2264 ++++++++++++++++++++++++++++++++++++++++++++
>> drivers/clk/meson/a1.h | 120 +++
>> 6 files changed, 2796 insertions(+)
>> create mode 100644 drivers/clk/meson/a1-pll.c
>> create mode 100644 drivers/clk/meson/a1-pll.h
>> create mode 100644 drivers/clk/meson/a1.c
>> create mode 100644 drivers/clk/meson/a1.h
>
> In the next version, one
OK, I will send a1 peripheral and pll driver in two patch.
>
>>
>> diff --git a/drivers/clk/meson/Kconfig b/drivers/clk/meson/Kconfig
>> index dabeb43..c2809b2 100644
>> --- a/drivers/clk/meson/Kconfig
>> +++ b/drivers/clk/meson/Kconfig
>> @@ -93,6 +93,16 @@ config COMMON_CLK_AXG_AUDIO
>> Support for the audio clock controller on AmLogic A113D devices,
>> aka axg, Say Y if you want audio subsystem to work.
>>
>> +config COMMON_CLK_A1
>> + bool
>> + depends on ARCH_MESON
>> + select COMMON_CLK_MESON_REGMAP
>> + select COMMON_CLK_MESON_DUALDIV
>> + select COMMON_CLK_MESON_PLL
>> + help
>> + Support for the clock controller on Amlogic A113L device,
>> + aka a1. Say Y if you want peripherals to work.
>> +
>> config COMMON_CLK_G12A
>> bool
>> depends on ARCH_MESON
>> diff --git a/drivers/clk/meson/Makefile b/drivers/clk/meson/Makefile
>> index 3939f21..28cbae1 100644
>> --- a/drivers/clk/meson/Makefile
>> +++ b/drivers/clk/meson/Makefile
>> @@ -16,6 +16,7 @@ obj-$(CONFIG_COMMON_CLK_MESON_VID_PLL_DIV) += vid-pll-div.o
>>
>> obj-$(CONFIG_COMMON_CLK_AXG) += axg.o axg-aoclk.o
>> obj-$(CONFIG_COMMON_CLK_AXG_AUDIO) += axg-audio.o
>> +obj-$(CONFIG_COMMON_CLK_A1) += a1-pll.o a1.o
>
> So far, all the controller had there own option, I don't see why it
> should be different here.
>
OK, I will add the other option CONFIG_COMMON_CLK_A1_PLL for pll driver
>> 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
>> diff --git a/drivers/clk/meson/a1-pll.c b/drivers/clk/meson/a1-pll.c
>> new file mode 100644
>> index 0000000..486d964
>> --- /dev/null
>> +++ b/drivers/clk/meson/a1-pll.c
>> @@ -0,0 +1,345 @@
>> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
>> +/*
>> + * Copyright (c) 2019 Amlogic, Inc. All rights reserved.
>> + * Author: Jian Hu <jian.hu@amlogic.com>
>> + */
>> +
>> +#include <linux/platform_device.h>
>
> Hum ... looks like some things are missing here
>
> #include <linux/of_device.h>
> #include <linux/clk-provider.h>
>
> ?
#1
There is <linux/clk-provider.h> in meson-eeclk.h file,

and for A1 driver(a1.c/a1-pll.c) the head file is not requied.

#2
For A1 driver, the file "linux/of_device.h" is not required.
It is required by meson-eeclk.c in fact.
>
>> +#include "clk-pll.h"
>> +#include "meson-eeclk.h"
>> +#include "a1-pll.h"
>
> Alphanumeric order please
>
OK, I will change it in the next version.

>> +
>> +static struct clk_regmap a1_fixed_pll_dco = {
>> + .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 = 19,
>> + },
>> + .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_fixpll",
>> + .name = "xtal_fixpll",
>> + },
>> + .num_parents = 1,
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_fixed_pll = {
>> + .data = &(struct clk_regmap_gate_data){
>> + .offset = ANACTRL_FIXPLL_CTRL0,
>> + .bit_idx = 20,
>> + },
>> + .hw.init = &(struct clk_init_data) {
>> + .name = "fixed_pll",
>> + .ops = &clk_regmap_gate_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_fixed_pll_dco.hw
>> + },
>> + .num_parents = 1,
>> + /*
>> + * This clock is fclk_div2/3/4's parent,
>> + * However, fclk_div2/3/5 feeds AXI/APB/DDR.
>
> is it fclk_div2/3/4 or fclk_div2/3/5 ?
>
>> + * It 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
>> + */
>
> Don't blindly copy/paste comments from other drivers. There is no driver
> for the devices you are mentionning so the end of the comment is
> confusing. The 3 first lines were enough
>
OK, I will remove the confusing comments

>> + .flags = CLK_IS_CRITICAL,
>
>>From your comment, I understand that some child are critical, not this
> particular (or at least, not directly). So this can be removed AFAICT
>
> You should even need CLK_IGNORE_UNUSED for this one since the clock will
> already be enabled before the late_init() kicks in
>
OK, I will replace it as CLK_IGNORE_UNUSED.
>> + },
>> +};
>> +
>> +static const struct pll_mult_range a1_hifi_pll_mult_range = {
>> + .min = 32,
>> + .max = 64,
>> +};
>> +
>> +static const struct reg_sequence a1_hifi_init_regs[] = {
>> + { .reg = ANACTRL_HIFIPLL_CTRL1, .def = 0x01800000 },
>> + { .reg = ANACTRL_HIFIPLL_CTRL2, .def = 0x00001100 },
>> + { .reg = ANACTRL_HIFIPLL_CTRL3, .def = 0x100a1100 },
>> + { .reg = ANACTRL_HIFIPLL_CTRL4, .def = 0x00302000 },
>> + { .reg = ANACTRL_HIFIPLL_CTRL0, .def = 0x01f18440 },
>> + { .reg = ANACTRL_HIFIPLL_CTRL0, .def = 0x11f18440, .delay_us = 10 },
>> + { .reg = ANACTRL_HIFIPLL_CTRL0, .def = 0x15f18440, .delay_us = 40 },
>> + { .reg = ANACTRL_HIFIPLL_CTRL2, .def = 0x00001140 },
>> + { .reg = ANACTRL_HIFIPLL_CTRL2, .def = 0x00001100 },
>> +};
>> +
>> +static struct clk_regmap a1_hifi_pll = {
>> + .data = &(struct meson_clk_pll_data){
>> + .en = {
>> + .reg_off = ANACTRL_HIFIPLL_CTRL0,
>> + .shift = 28,
>> + .width = 1,
>> + },
>> + .m = {
>> + .reg_off = ANACTRL_HIFIPLL_CTRL0,
>> + .shift = 0,
>> + .width = 8,
>> + },
>> + .n = {
>> + .reg_off = ANACTRL_HIFIPLL_CTRL0,
>> + .shift = 10,
>> + .width = 5,
>> + },
>> + .frac = {
>> + .reg_off = ANACTRL_HIFIPLL_CTRL1,
>> + .shift = 0,
>> + .width = 19,
>> + },
>> + .l = {
>> + .reg_off = ANACTRL_HIFIPLL_STS,
>> + .shift = 31,
>> + .width = 1,
>> + },
>> + .range = &a1_hifi_pll_mult_range,
>> + .init_regs = a1_hifi_init_regs,
>> + .init_count = ARRAY_SIZE(a1_hifi_init_regs),
>> + .strict_sequence = true,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "hifi_pll",
>> + .ops = &meson_clk_pll_ops,
>> + .parent_data = &(const struct clk_parent_data){
>> + .fw_name = "xtal_fixpll",
>> + .name = "xtal_fixpll",
>
> Both should provided when a controller transition from the old way of
> describing parent to the new way. This is a new controller so it does
> not apply.
I do not understand why it does not apply, could you explain more?

The xtal_fixpll clock is registered in another peripheral driver, If do
not desribe the "name" member in parent_data, "fw_name" does not work
because it has not been registered. the hifi_pll parent will be null in
/sys/kernel/debug/clk/hifi_pll/clk_parent.

HIFI PLL will be a orphan clock, but its parent should be xtal_fixpll.

So both of "fw_name" of "name" should be described.

>
> Same for the other occurences.
>
> Also, I think you meant xtal_hifipll
Yes,I will correct it.
>
>> + },
>> + .num_parents = 1,
>> + },
>> +};
>> +
>> +static struct clk_fixed_factor a1_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 *[]) {
>> + &a1_fixed_pll.hw
>> + },
>> + .num_parents = 1,
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_fclk_div2 = {
>> + .data = &(struct clk_regmap_gate_data){
>> + .offset = ANACTRL_FIXPLL_CTRL0,
>> + .bit_idx = 21,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "fclk_div2",
>> + .ops = &clk_regmap_gate_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_fclk_div2_div.hw
>> + },
>> + .num_parents = 1,
>> + /*
>> + * This clock is used by DDR clock in BL2 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 a1_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 *[]) {
>> + &a1_fixed_pll.hw
>> + },
>> + .num_parents = 1,
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_fclk_div3 = {
>> + .data = &(struct clk_regmap_gate_data){
>> + .offset = ANACTRL_FIXPLL_CTRL0,
>> + .bit_idx = 22,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "fclk_div3",
>> + .ops = &clk_regmap_gate_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_fclk_div3_div.hw
>> + },
>> + .num_parents = 1,
>> + /*
>> + * This clock is used by APB bus which setted in Romcode
>> + * 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 a1_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 *[]) {
>> + &a1_fixed_pll.hw
>> + },
>> + .num_parents = 1,
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_fclk_div5 = {
>> + .data = &(struct clk_regmap_gate_data){
>> + .offset = ANACTRL_FIXPLL_CTRL0,
>> + .bit_idx = 23,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "fclk_div5",
>> + .ops = &clk_regmap_gate_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_fclk_div5_div.hw
>> + },
>> + .num_parents = 1,
>> + /*
>> + * This clock is used by AXI bus which setted in Romcode
>> + * 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 a1_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 *[]) {
>> + &a1_fixed_pll.hw
>> + },
>> + .num_parents = 1,
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_fclk_div7 = {
>> + .data = &(struct clk_regmap_gate_data){
>> + .offset = ANACTRL_FIXPLL_CTRL0,
>> + .bit_idx = 24,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "fclk_div7",
>> + .ops = &clk_regmap_gate_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_fclk_div7_div.hw
>> + },
>> + .num_parents = 1,
>> + },
>> +};
>> +
>> +/* Array of all clocks provided by this provider */
>> +static struct clk_hw_onecell_data a1_pll_hw_onecell_data = {
>> + .hws = {
>> + [CLKID_FIXED_PLL_DCO] = &a1_fixed_pll_dco.hw,
>> + [CLKID_FIXED_PLL] = &a1_fixed_pll.hw,
>> + [CLKID_HIFI_PLL] = &a1_hifi_pll.hw,
>> + [CLKID_FCLK_DIV2] = &a1_fclk_div2.hw,
>> + [CLKID_FCLK_DIV3] = &a1_fclk_div3.hw,
>> + [CLKID_FCLK_DIV5] = &a1_fclk_div5.hw,
>> + [CLKID_FCLK_DIV7] = &a1_fclk_div7.hw,
>> + [CLKID_FCLK_DIV2_DIV] = &a1_fclk_div2_div.hw,
>> + [CLKID_FCLK_DIV3_DIV] = &a1_fclk_div3_div.hw,
>> + [CLKID_FCLK_DIV5_DIV] = &a1_fclk_div5_div.hw,
>> + [CLKID_FCLK_DIV7_DIV] = &a1_fclk_div7_div.hw,
>> + [NR_PLL_CLKS] = NULL,
>> + },
>> + .num = NR_PLL_CLKS,
>> +};
>> +
>> +static struct clk_regmap *const a1_pll_regmaps[] = {
>> + &a1_fixed_pll_dco,
>> + &a1_fixed_pll,
>> + &a1_hifi_pll,
>> + &a1_fclk_div2,
>> + &a1_fclk_div3,
>> + &a1_fclk_div5,
>> + &a1_fclk_div7,
>> +};
>> +
>> +static int meson_a1_pll_probe(struct platform_device *pdev)
>> +{
>> + int ret;
>> +
>> + ret = meson_eeclkc_probe(pdev);
>> + if (ret)
>> + return ret;
>> +
>> + return 0;
>> +}
>
> This function is useless.
>
OK, I will use meson_eeclkc_probe derectly.
>> +
>> +static const struct meson_eeclkc_data a1_pll_data = {
>> + .regmap_clks = a1_pll_regmaps,
>> + .regmap_clk_num = ARRAY_SIZE(a1_pll_regmaps),
>> + .hw_onecell_data = &a1_pll_hw_onecell_data,
>> +};
>> +static const struct of_device_id clkc_match_table[] = {
>> + {
>> + .compatible = "amlogic,a1-pll-clkc",
>> + .data = &a1_pll_data
>> + },
>> + { /* sentinel */ }
>
> Nitpick: don't need to write this, just write the line like this
>
OK, remove it.
> ' }, {}'
>
>> +};
>> +
>> +static struct platform_driver a1_driver = {
>> + .probe = meson_a1_pll_probe,
>> + .driver = {
>> + .name = "a1-pll-clkc",
>> + .of_match_table = clkc_match_table,
>> + },
>> +};
>> +
>> +builtin_platform_driver(a1_driver);
>> diff --git a/drivers/clk/meson/a1-pll.h b/drivers/clk/meson/a1-pll.h
>> new file mode 100644
>> index 0000000..99ee2a9
>> --- /dev/null
>> +++ b/drivers/clk/meson/a1-pll.h
>> @@ -0,0 +1,56 @@
>> +/* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */
>> +/*
>> + * Copyright (c) 2019 Amlogic, Inc. All rights reserved.
>> + */
>> +
>> +#ifndef __A1_PLL_H
>> +#define __A1_PLL_H
>> +
>> +/* PLL register offset */
>> +#define ANACTRL_FIXPLL_CTRL0 0x80
>> +#define ANACTRL_FIXPLL_CTRL1 0x84
>> +#define ANACTRL_FIXPLL_CTRL2 0x88
>> +#define ANACTRL_FIXPLL_CTRL3 0x8c
>> +#define ANACTRL_FIXPLL_CTRL4 0x90
>> +#define ANACTRL_FIXPLL_STS 0x94
>> +#define ANACTRL_SYSPLL_CTRL0 0x100
>> +#define ANACTRL_SYSPLL_CTRL1 0x104
>> +#define ANACTRL_SYSPLL_CTRL2 0x108
>> +#define ANACTRL_SYSPLL_CTRL3 0x10c
>> +#define ANACTRL_SYSPLL_CTRL4 0x110
>> +#define ANACTRL_SYSPLL_STS 0x114
>> +#define ANACTRL_HIFIPLL_CTRL0 0x140
>> +#define ANACTRL_HIFIPLL_CTRL1 0x144
>> +#define ANACTRL_HIFIPLL_CTRL2 0x148
>> +#define ANACTRL_HIFIPLL_CTRL3 0x14c
>> +#define ANACTRL_HIFIPLL_CTRL4 0x150
>> +#define ANACTRL_HIFIPLL_STS 0x154
>> +#define ANACTRL_AUDDDS_CTRL0 0x180
>> +#define ANACTRL_AUDDDS_CTRL1 0x184
>> +#define ANACTRL_AUDDDS_CTRL2 0x188
>> +#define ANACTRL_AUDDDS_CTRL3 0x18c
>> +#define ANACTRL_AUDDDS_CTRL4 0x190
>> +#define ANACTRL_AUDDDS_STS 0x194
>> +#define ANACTRL_MISCTOP_CTRL0 0x1c0
>> +#define ANACTRL_POR_CNTL 0x208
>> +
>> +/*
>> + * CLKID index values
>> + *
>> + * These indices are entirely contrived and do not map onto the hardware.
>> + * It has now been decided to expose everything by default in the DT header:
>> + * include/dt-bindings/clock/a1-pll-clkc.h. Only the clocks ids we don't want
>> + * to expose, such as the internal muxes and dividers of composite clocks,
>> + * will remain defined here.
>> + */
>> +#define CLKID_FIXED_PLL_DCO 0
>> +#define CLKID_FCLK_DIV2_DIV 2
>> +#define CLKID_FCLK_DIV3_DIV 3
>> +#define CLKID_FCLK_DIV5_DIV 4
>> +#define CLKID_FCLK_DIV7_DIV 5
>> +#define NR_PLL_CLKS 11
>> +
>> +/* include the CLKIDs that have been made part of the DT binding */
>> +#include <dt-bindings/clock/a1-pll-clkc.h>
>> +
>> +#endif /* __A1_PLL_H */
>> diff --git a/drivers/clk/meson/a1.c b/drivers/clk/meson/a1.c
>> new file mode 100644
>> index 0000000..86a4733
>> --- /dev/null
>> +++ b/drivers/clk/meson/a1.c
>> @@ -0,0 +1,2264 @@
>> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
>> +/*
>> + * Copyright (c) 2019 Amlogic, Inc. All rights reserved.
>> + * Author: Jian Hu <jian.hu@amlogic.com>
>> + */
>> +
>> +#include <linux/platform_device.h>
>> +#include "clk-pll.h"
>> +#include "clk-dualdiv.h"
>> +#include "meson-eeclk.h"
>> +#include "a1.h"
>
> Same as above
OK, I will change the order.
In fact, the clk-pll.h is not used in the current driver.
I will remove it.
>
>> +
>> +/* PLLs clock in gates, its parent is xtal */
>> +static struct clk_regmap a1_xtal_clktree = {
>> + .data = &(struct clk_regmap_gate_data){
>> + .offset = SYS_OSCIN_CTRL,
>> + .bit_idx = 0,
>> + },
>> + .hw.init = &(struct clk_init_data) {
>> + .name = "xtal_clktree",
>> + .ops = &clk_regmap_gate_ro_ops,
>> + .parent_data = &(const struct clk_parent_data) {
>> + .fw_name = "xtal",
>> + },
>> + .num_parents = 1,
>> + /*
>> + * switch for xtal clock
>> + * Linux should not change it at runtime
>> + */
>
> Comment not useful: it uses the Ro ops
>
OK, remove the comments
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_xtal_fixpll = {
>> + .data = &(struct clk_regmap_gate_data){
>> + .offset = SYS_OSCIN_CTRL,
>> + .bit_idx = 1,
>> + },
>> + .hw.init = &(struct clk_init_data) {
>> + .name = "xtal_fixpll",
>> + .ops = &clk_regmap_gate_ops,
>> + .parent_data = &(const struct clk_parent_data) {
>> + .fw_name = "xtal",
>> + },
>> + .num_parents = 1,
>> + .flags = CLK_IS_CRITICAL,
>> + /*
>> + * it feeds DDR,AXI,APB bus
>> + * Linux should not change it at runtime
>> + */
>
> Again, the child are critical, not directly this clock from your
> comment.
>
> Remove CRITICAL, put RO is linux is not supposed to touch it.
>
repace as clk_regmap_gate_ro_ops
>> + },
>> +};
>> +

[ ... ]

>> +
>> +/* dsp a clk */
>> +static u32 mux_table_dsp_ab[] = { 0, 1, 2, 3, 4, 7 };
>> +static const struct clk_parent_data dsp_ab_clk_parent_data[] = {
>> + { .fw_name = "xtal", },
>> + { .fw_name = "fclk_div2", },
>> + { .fw_name = "fclk_div3", },
>> + { .fw_name = "fclk_div5", },
>> + { .fw_name = "hifi_pll", },
>> + { .hw = &a1_rtc_clk.hw },
>> +};
>> +
>> +static struct clk_regmap a1_dspa_a_sel = {
>> + .data = &(struct clk_regmap_mux_data){
>> + .offset = DSPA_CLK_CTRL0,
>> + .mask = 0x7,
>> + .shift = 10,
>> + .table = mux_table_dsp_ab,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "dspa_a_sel",
>> + .ops = &clk_regmap_mux_ops,
>> + .parent_data = dsp_ab_clk_parent_data,
>> + .num_parents = ARRAY_SIZE(dsp_ab_clk_parent_data),
>
> .flags = CLK_SET_RATE_PARENT ?
Yes, I miss the flag.
>
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_dspa_a_div = {
>> + .data = &(struct clk_regmap_div_data){
>> + .offset = DSPA_CLK_CTRL0,
>> + .shift = 0,
>> + .width = 10,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "dspa_a_div",
>> + .ops = &clk_regmap_divider_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_dspa_a_sel.hw
>> + },
>> + .num_parents = 1,
>> + .flags = CLK_SET_RATE_PARENT,
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_dspa_a = {
>> + .data = &(struct clk_regmap_gate_data){
>> + .offset = DSPA_CLK_CTRL0,
>> + .bit_idx = 13,
>> + },
>> + .hw.init = &(struct clk_init_data) {
>> + .name = "dspa_a",
>> + .ops = &clk_regmap_gate_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_dspa_a_div.hw
>> + },
>> + .num_parents = 1,
>> + .flags = CLK_SET_RATE_PARENT,
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_dspa_b_sel = {
>> + .data = &(struct clk_regmap_mux_data){
>> + .offset = DSPA_CLK_CTRL0,
>> + .mask = 0x7,
>> + .shift = 26,
>> + .table = mux_table_dsp_ab,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "dspa_b_sel",
>> + .ops = &clk_regmap_mux_ops,
>> + .parent_data = dsp_ab_clk_parent_data,
>> + .num_parents = ARRAY_SIZE(dsp_ab_clk_parent_data),
>
> .flags = CLK_SET_RATE_PARENT ?
>
Yes, I will add it.
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_dspa_b_div = {
>> + .data = &(struct clk_regmap_div_data){
>> + .offset = DSPA_CLK_CTRL0,
>> + .shift = 16,
>> + .width = 10,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "dspa_b_div",
>> + .ops = &clk_regmap_divider_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_dspa_b_sel.hw
>> + },
>> + .num_parents = 1,
>> + .flags = CLK_SET_RATE_PARENT,
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_dspa_b = {
>> + .data = &(struct clk_regmap_gate_data){
>> + .offset = DSPA_CLK_CTRL0,
>> + .bit_idx = 29,
>> + },
>> + .hw.init = &(struct clk_init_data) {
>> + .name = "dspa_b",
>> + .ops = &clk_regmap_gate_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_dspa_b_div.hw
>> + },
>> + .num_parents = 1,
>> + .flags = CLK_SET_RATE_PARENT,
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_dspa_sel = {
>> + .data = &(struct clk_regmap_mux_data){
>> + .offset = DSPA_CLK_CTRL0,
>> + .mask = 0x1,
>> + .shift = 15,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "dspa_sel",
>> + .ops = &clk_regmap_mux_ops,
>> + .parent_data = (const struct clk_parent_data []) {
>> + { .hw = &a1_dspa_a.hw },
>> + { .hw = &a1_dspa_b.hw },
>> + },
>> + .num_parents = 2,
>> + .flags = CLK_SET_RATE_PARENT,
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_dspa_en_dspa = {
>> + .data = &(struct clk_regmap_gate_data){
>> + .offset = DSPA_CLK_EN,
>> + .bit_idx = 1,
>> + },
>> + .hw.init = &(struct clk_init_data) {
>> + .name = "dspa_en_dspa",
>> + .ops = &clk_regmap_gate_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_dspa_sel.hw
>> + },
>> + .num_parents = 1,
>> + .flags = CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED,
>
> Why do you need CLK_IGNORE_UNUSED ?
>
I should remove it
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_dspa_en_nic = {
>> + .data = &(struct clk_regmap_gate_data){
>> + .offset = DSPA_CLK_EN,
>> + .bit_idx = 0,
>> + },
>> + .hw.init = &(struct clk_init_data) {
>> + .name = "dspa_en_nic",
>> + .ops = &clk_regmap_gate_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_dspa_sel.hw
>> + },
>> + .num_parents = 1,
>> + .flags = CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED,
>
> Why do you need CLK_IGNORE_UNUSED ?
>
I should remove it
>> + },
>> +};
>> +
>
> Same question and remarks applies to DSP B
>
got it
>> +/* dsp b clk */
>> +static struct clk_regmap a1_dspb_a_sel = {
>> + .data = &(struct clk_regmap_mux_data){
>> + .offset = DSPB_CLK_CTRL0,
>> + .mask = 0x7,
>> + .shift = 10,
>> + .table = mux_table_dsp_ab,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "dspb_a_sel",
>> + .ops = &clk_regmap_mux_ops,
>> + .parent_data = dsp_ab_clk_parent_data,
>> + .num_parents = ARRAY_SIZE(dsp_ab_clk_parent_data),
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_dspb_a_div = {
>> + .data = &(struct clk_regmap_div_data){
>> + .offset = DSPB_CLK_CTRL0,
>> + .shift = 0,
>> + .width = 10,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "dspb_a_div",
>> + .ops = &clk_regmap_divider_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_dspb_a_sel.hw
>> + },
>> + .num_parents = 1,
>> + .flags = CLK_SET_RATE_PARENT,
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_dspb_a = {
>> + .data = &(struct clk_regmap_gate_data){
>> + .offset = DSPB_CLK_CTRL0,
>> + .bit_idx = 13,
>> + },
>> + .hw.init = &(struct clk_init_data) {
>> + .name = "dspb_a",
>> + .ops = &clk_regmap_gate_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_dspb_a_div.hw
>> + },
>> + .num_parents = 1,
>> + .flags = CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED,
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_dspb_b_sel = {
>> + .data = &(struct clk_regmap_mux_data){
>> + .offset = DSPB_CLK_CTRL0,
>> + .mask = 0x7,
>> + .shift = 26,
>> + .table = mux_table_dsp_ab,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "dspb_b_sel",
>> + .ops = &clk_regmap_mux_ops,
>> + .parent_data = dsp_ab_clk_parent_data,
>> + .num_parents = ARRAY_SIZE(dsp_ab_clk_parent_data),
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_dspb_b_div = {
>> + .data = &(struct clk_regmap_div_data){
>> + .offset = DSPB_CLK_CTRL0,
>> + .shift = 16,
>> + .width = 10,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "dspb_b_div",
>> + .ops = &clk_regmap_divider_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_dspb_b_sel.hw
>> + },
>> + .num_parents = 1,
>> + .flags = CLK_SET_RATE_PARENT,
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_dspb_b = {
>> + .data = &(struct clk_regmap_gate_data){
>> + .offset = DSPB_CLK_CTRL0,
>> + .bit_idx = 29,
>> + },
>> + .hw.init = &(struct clk_init_data) {
>> + .name = "dspb_b",
>> + .ops = &clk_regmap_gate_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_dspb_b_div.hw
>> + },
>> + .num_parents = 1,
>> + .flags = CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED,
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_dspb_sel = {
>> + .data = &(struct clk_regmap_mux_data){
>> + .offset = DSPB_CLK_CTRL0,
>> + .mask = 0x1,
>> + .shift = 15,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "dspb_sel",
>> + .ops = &clk_regmap_mux_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_dspb_a.hw, &a1_dspb_b.hw,
>> + },
>> + .num_parents = 2,
>> + .flags = CLK_SET_RATE_PARENT,
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_dspb_en_dspb = {
>> + .data = &(struct clk_regmap_gate_data){
>> + .offset = DSPB_CLK_EN,
>> + .bit_idx = 1,
>> + },
>> + .hw.init = &(struct clk_init_data) {
>> + .name = "dspb_en_dspb",
>> + .ops = &clk_regmap_gate_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_dspb_sel.hw
>> + },
>> + .num_parents = 1,
>> + .flags = CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED,
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_dspb_en_nic = {
>> + .data = &(struct clk_regmap_gate_data){
>> + .offset = DSPB_CLK_EN,
>> + .bit_idx = 0,
>> + },
>> + .hw.init = &(struct clk_init_data) {
>> + .name = "dspb_en_nic",
>> + .ops = &clk_regmap_gate_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_dspb_sel.hw
>> + },
>> + .num_parents = 1,
>> + .flags = CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED,
>> + },
>> +};
>> +
>> +/* 12M/24M clock */
>> +static struct clk_regmap a1_24m = {
>> + .data = &(struct clk_regmap_gate_data){
>> + .offset = CLK12_24_CTRL,
>> + .bit_idx = 11,
>> + },
>> + .hw.init = &(struct clk_init_data) {
>> + .name = "24m",
>> + .ops = &clk_regmap_gate_ops,
>> + .parent_data = &(const struct clk_parent_data) {
>> + .fw_name = "xtal",
>> + },
>> + .num_parents = 1,
>> + },
>> +};
>> +

[ ... ]

>> +static struct clk_regmap a1_saradc_sel = {
>> + .data = &(struct clk_regmap_mux_data){
>> + .offset = SAR_ADC_CLK_CTRL,
>> + .mask = 0x1,
>> + .shift = 9,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "saradc_sel",
>> + .ops = &clk_regmap_mux_ops,
>> + .parent_data = (const struct clk_parent_data []) {
>> + { .fw_name = "xtal", },
>> + { .hw = &a1_sys_clk.hw, },
>> + },
>> + .num_parents = 2,
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_saradc_div = {
>> + .data = &(struct clk_regmap_div_data){
>> + .offset = SAR_ADC_CLK_CTRL,
>> + .shift = 0,
>> + .width = 8,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "saradc_div",
>> + .ops = &clk_regmap_divider_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_saradc_sel.hw
>> + },
>> + .num_parents = 1,
>> + .flags = CLK_SET_RATE_PARENT,
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_saradc_clk = {
>> + .data = &(struct clk_regmap_gate_data){
>> + .offset = SAR_ADC_CLK_CTRL,
>> + .bit_idx = 8,
>> + },
>> + .hw.init = &(struct clk_init_data) {
>> + .name = "saradc_clk",
>> + .ops = &clk_regmap_gate_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_saradc_div.hw
>> + },
>> + .num_parents = 1,
>> + .flags = CLK_SET_RATE_PARENT,
>> + },
>> +};
>> +
>> +/* pwm a/b/c/d parent data */
>> +static const struct clk_parent_data pwm_parent_data[] = {
>> + { .fw_name = "xtal", },
>> + { .hw = &a1_sys_clk.hw },
>> +};
>
> Looks like the same as SAR ADC
>
OK, I will describe it like SAR ADC for pwm a/b/c/d
>> +
>> +/* pwm a clk */
>> +static struct clk_regmap a1_pwm_a_sel = {
>> + .data = &(struct clk_regmap_mux_data){
>> + .offset = PWM_CLK_AB_CTRL,
>> + .mask = 0x1,
>> + .shift = 9,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "pwm_a_sel",
>> + .ops = &clk_regmap_mux_ops,
>> + .parent_data = pwm_parent_data,
>> + .num_parents = ARRAY_SIZE(pwm_parent_data),
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_pwm_a_div = {
>> + .data = &(struct clk_regmap_div_data){
>> + .offset = PWM_CLK_AB_CTRL,
>> + .shift = 0,
>> + .width = 8,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "pwm_a_div",
>> + .ops = &clk_regmap_divider_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_pwm_a_sel.hw
>> + },
>> + .num_parents = 1,
>> + .flags = CLK_SET_RATE_PARENT,
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_pwm_a = {
>> + .data = &(struct clk_regmap_gate_data){
>> + .offset = PWM_CLK_AB_CTRL,
>> + .bit_idx = 8,
>> + },
>> + .hw.init = &(struct clk_init_data) {
>> + .name = "pwm_a",
>> + .ops = &clk_regmap_gate_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_pwm_a_div.hw
>> + },
>> + .num_parents = 1,
>> + /*
>> + * The CPU working voltage is controlled by pwm_a
>> + * in BL2 firmware. add the CLK_IGNORE_UNUSED flag
>> + * to avoid changing at runtime.
> ^ it
>
>> + * and is required by the platform to operate correctly.
> "blabla. And" is strange
>
>> + * 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_SET_RATE_PARENT | CLK_IGNORE_UNUSED,
>
> This only skips the late_init() disable of unused clocks
>
> Be aware that this is not fool-proof. If at any time a driver enable
> then disable the clock, the clock will be disable and I guess your
> platform will die if this provides the CPU voltage.
OK, CLK_IS_CRITICAL is better.
>
>> + },
>> +};
>> +
>> +/* pwm b clk */
>> +static struct clk_regmap a1_pwm_b_sel = {
>> + .data = &(struct clk_regmap_mux_data){
>> + .offset = PWM_CLK_AB_CTRL,
>> + .mask = 0x1,
>> + .shift = 25,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "pwm_b_sel",
>> + .ops = &clk_regmap_mux_ops,
>> + .parent_data = pwm_parent_data,
>> + .num_parents = ARRAY_SIZE(pwm_parent_data),
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_pwm_b_div = {
>> + .data = &(struct clk_regmap_div_data){
>> + .offset = PWM_CLK_AB_CTRL,
>> + .shift = 16,
>> + .width = 8,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "pwm_b_div",
>> + .ops = &clk_regmap_divider_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_pwm_b_sel.hw
>> + },
>> + .num_parents = 1,
>> + .flags = CLK_SET_RATE_PARENT,
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_pwm_b = {
>> + .data = &(struct clk_regmap_gate_data){
>> + .offset = PWM_CLK_AB_CTRL,
>> + .bit_idx = 24,
>> + },
>> + .hw.init = &(struct clk_init_data) {
>> + .name = "pwm_b",
>> + .ops = &clk_regmap_gate_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_pwm_b_div.hw
>> + },
>> + .num_parents = 1,
>> + .flags = CLK_SET_RATE_PARENT,
>> + },
>> +};
>> +
>> +/* pwm c clk */
>> +static struct clk_regmap a1_pwm_c_sel = {
>> + .data = &(struct clk_regmap_mux_data){
>> + .offset = PWM_CLK_CD_CTRL,
>> + .mask = 0x1,
>> + .shift = 9,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "pwm_c_sel",
>> + .ops = &clk_regmap_mux_ops,
>> + .parent_data = pwm_parent_data,
>> + .num_parents = ARRAY_SIZE(pwm_parent_data),
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_pwm_c_div = {
>> + .data = &(struct clk_regmap_div_data){
>> + .offset = PWM_CLK_CD_CTRL,
>> + .shift = 0,
>> + .width = 8,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "pwm_c_div",
>> + .ops = &clk_regmap_divider_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_pwm_c_sel.hw
>> + },
>> + .num_parents = 1,
>> + .flags = CLK_SET_RATE_PARENT,
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_pwm_c = {
>> + .data = &(struct clk_regmap_gate_data){
>> + .offset = PWM_CLK_CD_CTRL,
>> + .bit_idx = 8,
>> + },
>> + .hw.init = &(struct clk_init_data) {
>> + .name = "pwm_c",
>> + .ops = &clk_regmap_gate_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_pwm_c_div.hw
>> + },
>> + .num_parents = 1,
>> + .flags = CLK_SET_RATE_PARENT,
>> + },
>> +};
>> +
>> +/* pwm d clk */
>> +static struct clk_regmap a1_pwm_d_sel = {
>> + .data = &(struct clk_regmap_mux_data){
>> + .offset = PWM_CLK_CD_CTRL,
>> + .mask = 0x1,
>> + .shift = 25,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "pwm_d_sel",
>> + .ops = &clk_regmap_mux_ops,
>> + .parent_data = pwm_parent_data,
>> + .num_parents = ARRAY_SIZE(pwm_parent_data),
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_pwm_d_div = {
>> + .data = &(struct clk_regmap_div_data){
>> + .offset = PWM_CLK_CD_CTRL,
>> + .shift = 16,
>> + .width = 8,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "pwm_d_div",
>> + .ops = &clk_regmap_divider_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_pwm_d_sel.hw
>> + },
>> + .num_parents = 1,
>> + .flags = CLK_SET_RATE_PARENT,
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_pwm_d = {
>> + .data = &(struct clk_regmap_gate_data){
>> + .offset = PWM_CLK_CD_CTRL,
>> + .bit_idx = 24,
>> + },
>> + .hw.init = &(struct clk_init_data) {
>> + .name = "pwm_d",
>> + .ops = &clk_regmap_gate_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_pwm_d_div.hw
>> + },
>> + .num_parents = 1,
>> + .flags = CLK_SET_RATE_PARENT,
>> + },
>> +};
>> +
>> +static const struct clk_parent_data pwm_ef_parent_data[] = {
>> + { .fw_name = "xtal", },
>> + { .hw = &a1_sys_clk.hw },
>> + { .fw_name = "fclk_div5", },
>> + { .hw = &a1_rtc_clk.hw },
>> +};
>> +
>> +/* pwm e clk */
>> +static struct clk_regmap a1_pwm_e_sel = {
>> + .data = &(struct clk_regmap_mux_data){
>> + .offset = PWM_CLK_EF_CTRL,
>> + .mask = 0x3,
>> + .shift = 9,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "pwm_e_sel",
>> + .ops = &clk_regmap_mux_ops,
>> + .parent_data = pwm_ef_parent_data,
>> + .num_parents = ARRAY_SIZE(pwm_ef_parent_data),
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_pwm_e_div = {
>> + .data = &(struct clk_regmap_div_data){
>> + .offset = PWM_CLK_EF_CTRL,
>> + .shift = 0,
>> + .width = 8,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "pwm_e_div",
>> + .ops = &clk_regmap_divider_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_pwm_e_sel.hw
>> + },
>> + .num_parents = 1,
>> + .flags = CLK_SET_RATE_PARENT,
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_pwm_e = {
>> + .data = &(struct clk_regmap_gate_data){
>> + .offset = PWM_CLK_EF_CTRL,
>> + .bit_idx = 8,
>> + },
>> + .hw.init = &(struct clk_init_data) {
>> + .name = "pwm_e",
>> + .ops = &clk_regmap_gate_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_pwm_e_div.hw
>> + },
>> + .num_parents = 1,
>> + .flags = CLK_SET_RATE_PARENT,
>> + },
>> +};
>> +
>> +/* pwm f clk */
>> +static struct clk_regmap a1_pwm_f_sel = {
>> + .data = &(struct clk_regmap_mux_data){
>> + .offset = PWM_CLK_EF_CTRL,
>> + .mask = 0x3,
>> + .shift = 25,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "pwm_f_sel",
>> + .ops = &clk_regmap_mux_ops,
>> + .parent_data = pwm_ef_parent_data,
>> + .num_parents = ARRAY_SIZE(pwm_ef_parent_data),
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_pwm_f_div = {
>> + .data = &(struct clk_regmap_div_data){
>> + .offset = PWM_CLK_EF_CTRL,
>> + .shift = 16,
>> + .width = 8,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "pwm_f_div",
>> + .ops = &clk_regmap_divider_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_pwm_f_sel.hw
>> + },
>> + .num_parents = 1,
>> + .flags = CLK_SET_RATE_PARENT,
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_pwm_f = {
>> + .data = &(struct clk_regmap_gate_data){
>> + .offset = PWM_CLK_EF_CTRL,
>> + .bit_idx = 24,
>> + },
>> + .hw.init = &(struct clk_init_data) {
>> + .name = "pwm_f",
>> + .ops = &clk_regmap_gate_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_pwm_f_div.hw
>> + },
>> + .num_parents = 1,
>> + .flags = CLK_SET_RATE_PARENT,
>> + },
>> +};
>> +

[ ... ]

>> +
>> +/* dmc clk */
>> +static struct clk_regmap a1_dmc_sel = {
>> + .data = &(struct clk_regmap_mux_data){
>> + .offset = DMC_CLK_CTRL,
>> + .mask = 0x3,
>> + .shift = 9,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "dmc_sel",
>> + .ops = &clk_regmap_mux_ops,
>> + .parent_data = sd_emmc_parents,
>> + .num_parents = 4,
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_dmc_div = {
>> + .data = &(struct clk_regmap_div_data){
>> + .offset = DMC_CLK_CTRL,
>> + .shift = 0,
>> + .width = 8,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "dmc_div",
>> + .ops = &clk_regmap_divider_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_dmc_sel.hw
>> + },
>> + .num_parents = 1,
>> + .flags = CLK_SET_RATE_PARENT,
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_dmc_sel2 = {
>> + .data = &(struct clk_regmap_mux_data){
>> + .offset = DMC_CLK_CTRL,
>> + .mask = 0x1,
>> + .shift = 15,
>> + },
>> + .hw.init = &(struct clk_init_data){
>> + .name = "dmc_sel2",
>> + .ops = &clk_regmap_mux_ops,
>> + .parent_data = (const struct clk_parent_data []) {
>> + { .hw = &a1_dmc_div.hw },
>> + { .fw_name = "xtal", },
>> + },
>> + .num_parents = 2,
>> + .flags = CLK_SET_RATE_PARENT,
>> + },
>> +};
>> +
>> +static struct clk_regmap a1_dmc = {
>> + .data = &(struct clk_regmap_gate_data){
>> + .offset = DMC_CLK_CTRL,
>> + .bit_idx = 8,
>> + },
>> + .hw.init = &(struct clk_init_data) {
>> + .name = "dmc",
>> + .ops = &clk_regmap_gate_ops,
>> + .parent_hws = (const struct clk_hw *[]) {
>> + &a1_dmc_sel2.hw
>> + },
>> + .num_parents = 1,
>> + /*
>> + * This clock is used by DDR clock which setted in BL2
>> + * 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_SET_RATE_PARENT | CLK_IS_CRITICAL,
>> + },
>> +};
>
> Should you put all this DMC stuff in RO until you got a driver for it ?
OK, replace as clk_regmap_gate_ro_ops
>
[ ... ]
>> +
>> +static int meson_a1_periphs_probe(struct platform_device *pdev)
>> +{
>> + int ret;
>> +
>> + ret = meson_eeclkc_probe(pdev);
>> + if (ret)
>> + return ret;
>> +
>> + return 0;
>> +}
>
> Again this function is function is useless and it makes me wonder if you
> should really be using meson_eeclkc_probe()
>
> This makes you use syscon which is not correct unless you have a good
> reason ?
>
If it can not use the meson_eeclkc_probe(), I will realize a probe
function which is mostly duplicate with meson_eeclkc_probe() except
"syscon_node_to_regmap"

Maybe another common probe function and a new file are required for A1
three drivers? （include the CPU clock driver）

Or using meson_eeclkc_probe is more easier?

> Is there anything but clocks and resets in these register region ?
No, there is only clocks in the register region.
the same does the PLL register region.
>
>> +
>> +static const struct meson_eeclkc_data a1_periphs_data = {
>> + .regmap_clks = a1_periphs_regmaps,
>> + .regmap_clk_num = ARRAY_SIZE(a1_periphs_regmaps),
>> + .hw_onecell_data = &a1_periphs_hw_onecell_data,
>> +};
>> +static const struct of_device_id clkc_match_table[] = {
>> + {
>> + .compatible = "amlogic,a1-periphs-clkc",
>> + .data = &a1_periphs_data
>> + },
>> + { /* sentinel */ }
>> +};
>> +
>> +static struct platform_driver a1_driver = {
>> + .probe = meson_a1_periphs_probe,
>> + .driver = {
>> + .name = "a1-periphs-clkc",
>> + .of_match_table = clkc_match_table,
>> + },
>> +};
>> +
>> +builtin_platform_driver(a1_driver);
>> diff --git a/drivers/clk/meson/a1.h b/drivers/clk/meson/a1.h
>> new file mode 100644
>> index 0000000..1ae5e04
>> --- /dev/null
>> +++ b/drivers/clk/meson/a1.h
>> @@ -0,0 +1,120 @@
>> +/* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */
>> +/*
>> + * Copyright (c) 2019 Amlogic, Inc. All rights reserved.
>> + */
>> +
>> +#ifndef __A1_H
>> +#define __A1_H
>> +
>> +/* peripheral clock controller register offset */
>> +#define SYS_OSCIN_CTRL 0x0
>> +#define RTC_BY_OSCIN_CTRL0 0x4
>> +#define RTC_BY_OSCIN_CTRL1 0x8
>> +#define RTC_CTRL 0xc
>> +#define SYS_CLK_CTRL0 0x10
>> +#define AXI_CLK_CTRL0 0x14
>> +#define SYS_CLK_EN0 0x1c
>> +#define SYS_CLK_EN1 0x20
>> +#define AXI_CLK_EN 0x24
>> +#define DSPA_CLK_EN 0x28
>> +#define DSPB_CLK_EN 0x2c
>> +#define DSPA_CLK_CTRL0 0x30
>> +#define DSPB_CLK_CTRL0 0x34
>> +#define CLK12_24_CTRL 0x38
>> +#define GEN_CLK_CTRL 0x3c
>> +#define TIMESTAMP_CTRL0 0x40
>> +#define TIMESTAMP_CTRL1 0x44
>> +#define TIMESTAMP_CTRL2 0x48
>> +#define TIMESTAMP_VAL0 0x4c
>> +#define TIMESTAMP_VAL1 0x50
>> +#define TIMEBASE_CTRL0 0x54
>> +#define TIMEBASE_CTRL1 0x58
>> +#define SAR_ADC_CLK_CTRL 0xc0
>> +#define PWM_CLK_AB_CTRL 0xc4
>> +#define PWM_CLK_CD_CTRL 0xc8
>> +#define PWM_CLK_EF_CTRL 0xcc
>> +#define SPICC_CLK_CTRL 0xd0
>> +#define TS_CLK_CTRL 0xd4
>> +#define SPIFC_CLK_CTRL 0xd8
>> +#define USB_BUSCLK_CTRL 0xdc
>> +#define SD_EMMC_CLK_CTRL 0xe0
>> +#define CECA_CLK_CTRL0 0xe4
>> +#define CECA_CLK_CTRL1 0xe8
>> +#define CECB_CLK_CTRL0 0xec
>> +#define CECB_CLK_CTRL1 0xf0
>> +#define PSRAM_CLK_CTRL 0xf4
>> +#define DMC_CLK_CTRL 0xf8
>> +#define FCLK_DIV1_SEL 0xfc
>> +#define TST_CTRL 0x100
>> +
>> +#define CLKID_XTAL_CLKTREE 0
>> +#define CLKID_SYS_A_SEL 89
>> +#define CLKID_SYS_A_DIV 90
>> +#define CLKID_SYS_A 91
>> +#define CLKID_SYS_B_SEL 92
>> +#define CLKID_SYS_B_DIV 93
>> +#define CLKID_SYS_B 94
>> +#define CLKID_DSPA_A_SEL 95
>> +#define CLKID_DSPA_A_DIV 96
>> +#define CLKID_DSPA_A 97
>> +#define CLKID_DSPA_B_SEL 98
>> +#define CLKID_DSPA_B_DIV 99
>> +#define CLKID_DSPA_B 100
>> +#define CLKID_DSPB_A_SEL 101
>> +#define CLKID_DSPB_A_DIV 102
>> +#define CLKID_DSPB_A 103
>> +#define CLKID_DSPB_B_SEL 104
>> +#define CLKID_DSPB_B_DIV 105
>> +#define CLKID_DSPB_B 106
>> +#define CLKID_RTC_32K_CLKIN 107
>> +#define CLKID_RTC_32K_DIV 108
>> +#define CLKID_RTC_32K_XTAL 109
>> +#define CLKID_RTC_32K_SEL 110
>> +#define CLKID_CECB_32K_CLKIN 111
>> +#define CLKID_CECB_32K_DIV 112
>> +#define CLKID_CECB_32K_SEL_PRE 113
>> +#define CLKID_CECB_32K_SEL 114
>> +#define CLKID_CECA_32K_CLKIN 115
>> +#define CLKID_CECA_32K_DIV 116
>> +#define CLKID_CECA_32K_SEL_PRE 117
>> +#define CLKID_CECA_32K_SEL 118
>> +#define CLKID_DIV2_PRE 119
>> +#define CLKID_24M_DIV2 120
>> +#define CLKID_GEN_SEL 121
>> +#define CLKID_GEN_DIV 122
>> +#define CLKID_SARADC_DIV 123
>> +#define CLKID_PWM_A_SEL 124
>> +#define CLKID_PWM_A_DIV 125
>> +#define CLKID_PWM_B_SEL 126
>> +#define CLKID_PWM_B_DIV 127
>> +#define CLKID_PWM_C_SEL 128
>> +#define CLKID_PWM_C_DIV 129
>> +#define CLKID_PWM_D_SEL 130
>> +#define CLKID_PWM_D_DIV 131
>> +#define CLKID_PWM_E_SEL 132
>> +#define CLKID_PWM_E_DIV 133
>> +#define CLKID_PWM_F_SEL 134
>> +#define CLKID_PWM_F_DIV 135
>> +#define CLKID_SPICC_SEL 136
>> +#define CLKID_SPICC_DIV 137
>> +#define CLKID_SPICC_SEL2 138
>> +#define CLKID_TS_DIV 139
>> +#define CLKID_SPIFC_SEL 140
>> +#define CLKID_SPIFC_DIV 141
>> +#define CLKID_SPIFC_SEL2 142
>> +#define CLKID_USB_BUS_SEL 143
>> +#define CLKID_USB_BUS_DIV 144
>> +#define CLKID_SD_EMMC_SEL 145
>> +#define CLKID_SD_EMMC_DIV 146
>> +#define CLKID_SD_EMMC_SEL2 147
>> +#define CLKID_PSRAM_SEL 148
>> +#define CLKID_PSRAM_DIV 149
>> +#define CLKID_PSRAM_SEL2 150
>> +#define CLKID_DMC_SEL 151
>> +#define CLKID_DMC_DIV 152
>> +#define CLKID_DMC_SEL2 153
>> +#define NR_CLKS 154
>> +
>> +#include <dt-bindings/clock/a1-clkc.h>
>> +
>> +#endif /* __A1_H */
>
> .
>