Re: [PATCH 2/2] dt-bindings: pwm: mediatek: Add compatible string for MT7986

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On 21/10/2022 18:58, Daniel Golle wrote:
> On Fri, Oct 21, 2022 at 05:23:38PM -0500, Rob Herring wrote:
>> On Fri, Oct 21, 2022 at 04:25:18PM +0100, Daniel Golle wrote:
>>> Add new compatible string for MT7986 PWM.
>>>
>>> Signed-off-by: Daniel Golle <daniel@xxxxxxxxxxxxxx>
>>> ---
>>>  Documentation/devicetree/bindings/pwm/pwm-mediatek.txt | 1 +
>>>  1 file changed, 1 insertion(+)
>>>
>>> diff --git a/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt b/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt
>>> index 554c96b6d0c3e0..6f4e60c9e18b81 100644
>>> --- a/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt
>>> +++ b/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt
>>> @@ -8,6 +8,7 @@ Required properties:
>>>     - "mediatek,mt7623-pwm": found on mt7623 SoC.
>>>     - "mediatek,mt7628-pwm": found on mt7628 SoC.
>>>     - "mediatek,mt7629-pwm": found on mt7629 SoC.
>>> +   - "mediatek,mt7986-pwm": found on mt7986 SoC.
>>
>> This version of the PWM h/w is not compatible with any of the existing 
>> chips? If it is, it should have a fallback compatible.
> 
> No, it is unique because it comes with just 2 PWM channels.
> Otherwise the driver behaves just like for MT8183 (4 channels) or
> MT8365 (3 channels) which also got distinct compatible strings.

Then something would be here compatible. E.g. If you bound MT8183 with
mt7986-pwm compatible, would you get working device with two channels?

If so, they are compatible.

Best regards,
Krzysztof




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