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

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Message-ID: <2da06dac-7a1a-461c-956d-13b74320723e@linaro.org>
Date: Wed, 7 Aug 2024 07:44:18 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Xianwei Zhao <xianwei.zhao@...ogic.com>,
 Krzysztof Kozlowski <krzk@...nel.org>,
 Neil Armstrong <neil.armstrong@...aro.org>,
 Jerome Brunet <jbrunet@...libre.com>,
 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>
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
Subject: Re: [PATCH 1/3] dt-bindings: clock: fix C3 PLL input parameter

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?

> 
>>>
>>> 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.

With "fixed" it is still ABI break, right?

Best regards,
Krzysztof