Re: [PATCH v2 1/8] dt-bindings: clock: qcom: Allow VDD_GFX supply to GX

[Konrad Dybcio]

On 22.12.2023 09:12, Krzysztof Kozlowski wrote:
> On 22/12/2023 05:39, Bjorn Andersson wrote:
>> In some designs the SoC's VDD_GFX pads are supplied by an external
>> regulator, rather than a power-domain. Allow this to be described in the
>> GPU clock controller binding.
>>
>> Signed-off-by: Bjorn Andersson <quic_bjorande@xxxxxxxxxxx>
>> ---
>>  Documentation/devicetree/bindings/clock/qcom,gpucc.yaml | 16 ++++++++++++++++
>>  1 file changed, 16 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/clock/qcom,gpucc.yaml b/Documentation/devicetree/bindings/clock/qcom,gpucc.yaml
>> index f369fa34e00c..c0dd24c9dcb3 100644
>> --- a/Documentation/devicetree/bindings/clock/qcom,gpucc.yaml
>> +++ b/Documentation/devicetree/bindings/clock/qcom,gpucc.yaml
>> @@ -53,6 +53,9 @@ properties:
>>    power-domains:
>>      maxItems: 1
>>  
>> +  vdd-gfx-supply:
>> +    description: Regulator supply for the VDD_GFX pads
>> +
>>    '#clock-cells':
>>      const: 1
>>  
>> @@ -74,6 +77,19 @@ required:
>>    - '#reset-cells'
>>    - '#power-domain-cells'
>>  
>> +# Allow either power-domains or vdd-gfx-supply, not both
>> +oneOf:
>> +  - required:
>> +      - power-domains
>> +  - required:
>> +      - vdd-gfx-supply
> 
> This should be enough, assuming one of them is actually required. The
> code. See also:
> https://elixir.bootlin.com/linux/v5.17-rc2/source/Documentation/devicetree/bindings/reserved-memory/reserved-memory.yaml#L91
At least one of them indeed is, though this change is being made
implicitly. No clock controller works with no power FWIW

Konrad