linux-kernel - Re: [PATCH 1/3] dt-bindings: clock: fix C3 PLL input parameter

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Message-ID: <9718cdaa-1a5a-4153-b19b-328127dedbee@amlogic.com>
Date: Wed, 7 Aug 2024 16:23:27 +0800
From: Xianwei Zhao <xianwei.zhao@...ogic.com>
To: Jerome Brunet <jbrunet@...libre.com>,
 Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc: Krzysztof Kozlowski <krzk@...nel.org>,
 Neil Armstrong <neil.armstrong@...aro.org>,
 Michael Turquette <mturquette@...libre.com>, Stephen Boyd
 <sboyd@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Chuan Liu <chuan.liu@...ogic.com>,
 Kevin Hilman <khilman@...libre.com>,
 Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
 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
Subject: Re: [PATCH 1/3] dt-bindings: clock: fix C3 PLL input parameter

Hi Jerome,
     Thanks for your reply.

On 2024/8/7 15:56, Jerome Brunet wrote:
> [ EXTERNAL EMAIL ]
> 
> On Wed 07 Aug 2024 at 07:44, Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org> wrote:
> 
>> On 07/08/2024 03:55, Xianwei Zhao wrote:
>>> Hi Krzysztof,
>>>       Thanks for your review.
>>>
>>> On 2024/8/6 21:10, Krzysztof Kozlowski wrote:
>>>> [ EXTERNAL EMAIL ]
>>>>
>>>> On 06/08/2024 12:27, Xianwei Zhao via B4 Relay wrote:
>>>>> From: Xianwei Zhao <xianwei.zhao@...ogic.com>
>>>>>
>>>>> Add C3 PLL controller input clock parameters "fix".
>>>>
>>>> What is "parameters" here? Why you are adding it? Is it missing?
>>>> Something is not working?
>>>>
>>> Yes. The previous submission was lost.
>>
>> What submission is lost?
>>
> 
> He means it was just forgotten in the submission and noboby picked up on
> it at the time. He is not not trying to sneak anything new. That input
> is used everywhere in the driver and nothing would work without it.
> 
> It is just an honest mistake that he is trying to correct
> 
> Indeed the description could certainly detail this a bit more
> 
>>>
>>>>>
>>>>> Fixes: 0e6be855a96d ("dt-bindings: clock: add Amlogic C3 PLL clock controller")
>>>>
>>>> Why? What bug are you fixing?
>>>
>>> The input clock of PLL clock controller need the clock whose fw_name is
>>> called "fix".
>>
>> Then explain this in commit msg.
>>
>>>>
>>>>> Signed-off-by: Xianwei Zhao <xianwei.zhao@...ogic.com>
>>>>> ---
>>>>>    Documentation/devicetree/bindings/clock/amlogic,c3-pll-clkc.yaml | 7 +++++--
>>>>>    1 file changed, 5 insertions(+), 2 deletions(-)
>>>>>
>>>>> diff --git a/Documentation/devicetree/bindings/clock/amlogic,c3-pll-clkc.yaml b/Documentation/devicetree/bindings/clock/amlogic,c3-pll-clkc.yaml
>>>>> index 43de3c6fc1cf..700865cc9792 100644
>>>>> --- a/Documentation/devicetree/bindings/clock/amlogic,c3-pll-clkc.yaml
>>>>> +++ b/Documentation/devicetree/bindings/clock/amlogic,c3-pll-clkc.yaml
>>>>> @@ -24,11 +24,13 @@ properties:
>>>>>        items:
>>>>>          - description: input top pll
>>>>>          - description: input mclk pll
>>>>> +      - description: input fix pll
>>>>>
>>>>>      clock-names:
>>>>>        items:
>>>>>          - const: top
>>>>>          - const: mclk
>>>>> +      - const: fix
>>>>
>>>> and that's not an ABI break because?
>>> This is "fixed" clock.
>>> I will modify "fix" to "fixed",in next version.
> 
> No keep the original name. No reason to change it and make more of a mess.
> 

OK. Will keep original name.

>>
>> With "fixed" it is still ABI break, right?
> 
> It is an ABI break but on a new and immature platform.
> Noboby could really use that platform at this stage, so nothing is going
> to break on anyone really.
> 
>>
>> Best regards,
>> Krzysztof
> 
> --
> Jerome