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SubjectRe: [PATCH] dt-bindings: mmc: Add resets property to cadence SDHCI binding
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On 09/02/2023 12:34, Kunihiko Hayashi wrote:
> Hi Krzysztof,
>
> On 2023/02/09 18:14, Krzysztof Kozlowski wrote:
>> On 09/02/2023 02:42, Kunihiko Hayashi wrote:
>>> Cadence SDHCI controller allows reset control support on UniPhier SoC.
>>> Add resets property to cadence SDHCI binding.
>>>
>>> Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
>>> ---
>>> Documentation/devicetree/bindings/mmc/cdns,sdhci.yaml | 3 +++
>>> 1 file changed, 3 insertions(+)
>>>
>>> diff --git a/Documentation/devicetree/bindings/mmc/cdns,sdhci.yaml
>>> b/Documentation/devicetree/bindings/mmc/cdns,sdhci.yaml
>>> index d3dce4d6c168..adacd0535c14 100644
>>> --- a/Documentation/devicetree/bindings/mmc/cdns,sdhci.yaml
>>> +++ b/Documentation/devicetree/bindings/mmc/cdns,sdhci.yaml
>>> @@ -29,6 +29,9 @@ properties:
>>> clocks:
>>> maxItems: 1
>>>
>>> + resets:
>>> + maxItems: 1
>>
>> This looks specific to UniPhier, doesn't it?
>
> I think this IP has some hardware reset lines, however,


Hm, fine with me. It's actually expected.

> it depends on the implementation whether the lines can be
> soft controlled or controlled by power-on-reset.
>
> In case of UniPhier SoC, these lines are connected to the syscon
> reset controller, but deasserted with initial state.
>
> Currently, the binding has one compatible.
> If drawing this dependency, Is the device dependent compatible necessary?
> Or I can remove reset property from DT.

No, its okay.


Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Best regards,
Krzysztof

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