linux-kernel - Re: [PATCH v7 5/5] clk: meson: c3: add c3 clock peripherals controller driver

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Message-ID: <9a9ab302-5da5-47bb-85f1-d2295fa9f8c9@amlogic.com>
Date: Thu, 25 Apr 2024 14:28:27 +0800
From: Xianwei Zhao <xianwei.zhao@...ogic.com>
To: Rob Herring <robh@...nel.org>
Cc: linux-amlogic@...ts.infradead.org, linux-clk@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org,
 Neil Armstrong <neil.armstrong@...aro.org>,
 Jerome Brunet <jbrunet@...libre.com>,
 Michael Turquette <mturquette@...libre.com>, Stephen Boyd
 <sboyd@...nel.org>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>, Kevin Hilman <khilman@...libre.com>,
 Chuan Liu <chuan.liu@...ogic.com>
Subject: Re: [PATCH v7 5/5] clk: meson: c3: add c3 clock peripherals
 controller driver

Hi Rob,
    Thanks for your review.

On 2024/4/25 04:01, Rob Herring wrote:
> [ EXTERNAL EMAIL ]
> 
> On Wed, Apr 24, 2024 at 01:09:28PM +0800, Xianwei Zhao wrote:
>> Add the C3 peripherals clock controller driver in the C3 SoC family.
>>
>> Co-developed-by: Chuan Liu <chuan.liu@...ogic.com>
>> Signed-off-by: Chuan Liu <chuan.liu@...ogic.com>
>> Signed-off-by: Xianwei Zhao <xianwei.zhao@...ogic.com>
>> ---
>>   drivers/clk/meson/Kconfig          |   15 +
>>   drivers/clk/meson/Makefile         |    1 +
>>   drivers/clk/meson/c3-peripherals.c | 2366 ++++++++++++++++++++++++++++
>>   3 files changed, 2382 insertions(+)
>>   create mode 100644 drivers/clk/meson/c3-peripherals.c
>>
>> diff --git a/drivers/clk/meson/Kconfig b/drivers/clk/meson/Kconfig
>> index 9f975a980581..0b85d584910e 100644
>> --- a/drivers/clk/meson/Kconfig
>> +++ b/drivers/clk/meson/Kconfig
>> @@ -142,6 +142,21 @@ config COMMON_CLK_C3_PLL
>>          AKA C3. Say Y if you want the board to work, because PLLs are the parent
>>          of most peripherals.
>>
>> +config COMMON_CLK_C3_PERIPHERALS
>> +     tristate "Amlogic C3 peripherals clock controller"
>> +     depends on ARM64
>> +     depends on ARM_SCMI_PROTOCOL
> 
> I may have missed it, but I don't see the dependency on SCMI in this
> driver.
> 

Some clock sources for peripherals controller from SCMI module.
In previous version, Jerome suggest us the clock  that relevant 
registers can only be accessed securely is implemented through SCMI.

>> +     depends on COMMON_CLK_SCMI
>> +     depends on COMMON_CLK_C3_PLL
>> +     default y
>> +     select COMMON_CLK_MESON_REGMAP
>> +     select COMMON_CLK_MESON_DUALDIV
>> +     select COMMON_CLK_MESON_CLKC_UTILS
>> +     help
>> +       Support for the Peripherals clock controller on Amlogic C302X and
>> +       C308L devices, AKA C3. Say Y if you want the peripherals clock to
>> +       work.
>> +
>>   config COMMON_CLK_G12A
>>        tristate "G12 and SM1 SoC clock controllers support"
>>        depends on ARM64
>> diff --git a/drivers/clk/meson/Makefile b/drivers/clk/meson/Makefile
>> index 4420af628b31..20ad9482c892 100644
>> --- a/drivers/clk/meson/Makefile
>> +++ b/drivers/clk/meson/Makefile
>> @@ -20,6 +20,7 @@ obj-$(CONFIG_COMMON_CLK_AXG_AUDIO) += axg-audio.o
>>   obj-$(CONFIG_COMMON_CLK_A1_PLL) += a1-pll.o
>>   obj-$(CONFIG_COMMON_CLK_A1_PERIPHERALS) += a1-peripherals.o
>>   obj-$(CONFIG_COMMON_CLK_C3_PLL) += c3-pll.o
>> +obj-$(CONFIG_COMMON_CLK_C3_PERIPHERALS) += c3-peripherals.o
>>   obj-$(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
>> diff --git a/drivers/clk/meson/c3-peripherals.c b/drivers/clk/meson/c3-peripherals.c
>> new file mode 100644
>> index 000000000000..0f834ced0ee9
>> --- /dev/null
>> +++ b/drivers/clk/meson/c3-peripherals.c
>> @@ -0,0 +1,2366 @@
>> +// SPDX-License-Identifier: GPL-2.0-only
>> +/*
>> + * Amlogic C3 Peripherals Clock Controller Driver
>> + *
>> + * Copyright (c) 2023 Amlogic, inc.
>> + * Author: Chuan Liu <chuan.liu@...ogic.com>
>> + */
>> +
>> +#include <linux/clk-provider.h>
>> +#include <linux/of_device.h>
> 
> I don't think you need this header.
> 

Yes, I will fix it with c3-pll.c.

>> +#include <linux/platform_device.h>
>> +#include "clk-regmap.h"
>> +#include "clk-dualdiv.h"
>> +#include "meson-clkc-utils.h"
>> +#include <dt-bindings/clock/amlogic,c3-peripherals-clkc.h>