linux-kernel - Re: [PATCH v3 1/2] dt-bindings: pwm: amlogic: Add new bindings for meson A1 PWM

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Message-ID: <4ec6b50e-b915-4e18-a8a5-97ca7ab9e4ce@salutedevices.com>
Date: Mon, 8 Jul 2024 18:37:21 +0300
From: George Stark <gnstark@...utedevices.com>
To: Jerome Brunet <jbrunet@...libre.com>
CC: <ukleinek@...nel.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
	<conor+dt@...nel.org>, <neil.armstrong@...aro.org>, <khilman@...libre.com>,
	<martin.blumenstingl@...glemail.com>, <hkallweit1@...il.com>,
	<linux-pwm@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-amlogic@...ts.infradead.org>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <kernel@...utedevices.com>, Dmitry Rokosov
	<ddrokosov@...utedevices.com>
Subject: Re: [PATCH v3 1/2] dt-bindings: pwm: amlogic: Add new bindings for
 meson A1 PWM

Hello Jerome

Thanks for the review

On 7/8/24 16:11, Jerome Brunet wrote:
> On Tue 02 Jul 2024 at 15:34, George Stark <gnstark@...utedevices.com> wrote:
> 
>> The chip has 3 dual-channel PWM modules PWM_AB, PWM_CD, PWM_EF.
>>
>> Signed-off-by: George Stark <gnstark@...utedevices.com>
>> Signed-off-by: Dmitry Rokosov <ddrokosov@...utedevices.com>
>> ---
>>   .../devicetree/bindings/pwm/pwm-amlogic.yaml    | 17 +++++++++++++++++
>>   1 file changed, 17 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/pwm/pwm-amlogic.yaml b/Documentation/devicetree/bindings/pwm/pwm-amlogic.yaml
>> index 1d71d4f8f328..e021cf59421a 100644
>> --- a/Documentation/devicetree/bindings/pwm/pwm-amlogic.yaml
>> +++ b/Documentation/devicetree/bindings/pwm/pwm-amlogic.yaml

...

> 
> The change is not only introducing a1 compatibility but also allowing a
> power-domain for the other SoC, even if optional.
> 
> If that is intended, it should be stated in the description and probably
> a separate change.

AFAIK the only SoC with a separate PD for PWM is A1 (currently). I added 
PD to bindings by an independent change in series #2 [1] but Rob
proposed it should be squashed into compatible patch. The only thing 
missed in series #2 was the conditional schema making PD required for A1.

I personally would prefer to add PD as a separate change.
I'll give it a try.

[1] 
https://lore.kernel.org/lkml/20240701172016.523402-1-gnstark@salutedevices.com/T/#m0e004fc0d22e205aa3bf6bdd0284d251f26eb0f3


> 
>>     "#pwm-cells":
>>       const: 3
>>   
>> @@ -136,6 +143,16 @@ allOf:
>>         required:
>>           - clocks
>>   
>> +  - if:
>> +      properties:
>> +        compatible:
>> +          contains:
>> +            enum:
>> +              - amlogic,meson-a1-pwm
>> +    then:
>> +      required:
>> +        - power-domains
>> +
>>   additionalProperties: false
>>   
>>   examples:
> 

-- 
Best regards
George