linux-kernel - Re: [PATCH V2 4/4] clk: meson: c3: add c3 clock peripherals controller driver

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Message-ID: <05a5c068-6766-ade4-0e7c-e94b48c4d754@amlogic.com>
Date:   Mon, 16 Oct 2023 14:49:48 +0800
From:   Xianwei Zhao <xianwei.zhao@...ogic.com>
To:     Stephen Boyd <sboyd@...nel.org>,
        Jerome Brunet <jbrunet@...libre.com>,
        devicetree@...r.kernel.org, linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Neil Armstrong <neil.armstrong@...aro.org>,
        Michael Turquette <mturquette@...libre.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Kevin Hilman <khilman@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Chuan Liu <chuan.liu@...ogic.com>
Subject: Re: [PATCH V2 4/4] clk: meson: c3: add c3 clock peripherals
 controller driver

Hi Stephen & Jerome,
        Thanks for your reply.

On 2023/10/14 06:01, Stephen Boyd wrote:
> [ EXTERNAL EMAIL ]
> 
> Quoting Jerome Brunet (2023-10-13 00:38:14)
>>
>> On Thu 12 Oct 2023 at 16:51, Stephen Boyd <sboyd@...nel.org> wrote:
>>
>>> Quoting Xianwei Zhao (2023-10-09 23:29:17)
>>>> diff --git a/drivers/clk/meson/Kconfig b/drivers/clk/meson/Kconfig
>>>> index 76be4bbd2afb..c8d59d28c8ff 100644
>>>> --- a/drivers/clk/meson/Kconfig
>>>> +++ b/drivers/clk/meson/Kconfig
>>>> @@ -140,6 +140,19 @@ config COMMON_CLK_C3_PLL
>>>>            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"
>>>> +       default y
>>>
>>> Why are these default y? They should depend on something like ARM64 and
>>> even then I don't see why we want to enable them by default if we're
>>> building the ARM64 kernel.
>>
>> Should indeed depend on ARM64.
> 
> Cool. >
Will add depend on ARM64  in next version.
>>
>> Those are the main clock controllers. Like for other AML SoC families,
>> they are necessary to boot the device which is why they use 'default y'
>>
>> Is it a problem ?
>>
>> The whole meson directory depends on ARCH_MESON, so the drivers will go
>> away if Amlogic support is removed on ARM64.
> 
> No it isn't a problem if the entire section is implicitly depending on
> ARCH_MESON.