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Date:   Fri, 14 Apr 2023 12:31:26 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
Cc:     matthias.bgg@...il.com, p.zabel@...gutronix.de, airlied@...il.com,
        daniel@...ll.ch, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, jassisinghbrar@...il.com,
        chunfeng.yun@...iatek.com, vkoul@...nel.org, kishon@...nel.org,
        thierry.reding@...il.com, chunkuang.hu@...nel.org,
        ck.hu@...iatek.com, jitao.shi@...iatek.com,
        xinlei.lee@...iatek.com, houlong.wei@...iatek.com,
        dri-devel@...ts.freedesktop.org,
        linux-mediatek@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-phy@...ts.infradead.org, linux-pwm@...r.kernel.org,
        kernel@...labora.com, phone-devel@...r.kernel.org,
        ~postmarketos/upstreaming@...ts.sr.ht
Subject: Re: [PATCH 01/27] dt-bindings: pwm: Add compatible for MediaTek
 MT6795

On 14/04/2023 12:25, AngeloGioacchino Del Regno wrote:
> Il 14/04/23 10:34, Krzysztof Kozlowski ha scritto:
>> On 14/04/2023 10:30, Uwe Kleine-König wrote:
>>> On Fri, Apr 14, 2023 at 10:21:05AM +0200, Krzysztof Kozlowski wrote:
>>>> On 12/04/2023 13:27, AngeloGioacchino Del Regno wrote:
>>>>> Add a compatible string for MediaTek Helio X10 MT6795's display PWM
>>>>> block: this is the same as MT8173.
>>>>>
>>>>> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
>>>>> ---
>>>>>   Documentation/devicetree/bindings/pwm/mediatek,pwm-disp.yaml | 4 +++-
>>>>>   1 file changed, 3 insertions(+), 1 deletion(-)
>>>>>
>>>>> diff --git a/Documentation/devicetree/bindings/pwm/mediatek,pwm-disp.yaml b/Documentation/devicetree/bindings/pwm/mediatek,pwm-disp.yaml
>>>>> index 0088bc8e7c54..153e146df7d4 100644
>>>>> --- a/Documentation/devicetree/bindings/pwm/mediatek,pwm-disp.yaml
>>>>> +++ b/Documentation/devicetree/bindings/pwm/mediatek,pwm-disp.yaml
>>>>> @@ -22,7 +22,9 @@ properties:
>>>>>             - mediatek,mt8173-disp-pwm
>>>>>             - mediatek,mt8183-disp-pwm
>>>>>         - items:
>>>>> -          - const: mediatek,mt8167-disp-pwm
>>>>> +          - enum:
>>>>> +              - mediatek,mt6795-disp-pwm
>>>>> +              - mediatek,mt8167-disp-pwm
>>>>
>>>> This does not look correct. You do not add compatible, you replace
>>>> breaking all mt8167-disp-pwm. At least it looks like this from context.
>>>
>>> I thought the old semantic to be:
>>>
>>> 	"mediatek,mt8167-disp-pwm"
>>>
>>> and the new
>>>
>>> 	"mediatek,mt6795-disp-pwm" or "mediatek,mt8167-disp-pwm"
>>>
>>> . What am I missing?
>>
>> The new is ok for mt6795 but it is not valid for mt8167.
>>
> 
> Sorry, why is it not valid for MT8167?

Eh, above example did not help me, because it missed mt8173, but I see
now the context I missed. It's already a list of two compatibles, so the
patch is fine.

Best regards,
Krzysztof

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