Re: [PATCH v3 3/4] dt-bindings: PCI: qcom: correct clocks for SM8150

Krzysztof Kozlowski
2023-12-08T12:18:02Z

On 08/12/2023 12:09, Dmitry Baryshkov wrote:
> On Fri, 8 Dec 2023 at 12:52, Krzysztof Kozlowski
> <krzysztof.kozlowski@linaro.org> wrote:
>>
>> PCI node in Qualcomm SM8150 should have exactly 8 clocks, including the
>> ref clock.
>>
>> Suggested-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
>> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
>>
>> ---
>>
>> Please take the patch via PCI tree.
>>
>> Changes in v3:
>> 1. New patch: Split from sc8180x change.
>> 2. Add refclk as explained here:
>> https://lore.kernel.org/all/20231121065440.GB3315@thinkpad/
>> ---
>> .../devicetree/bindings/pci/qcom,pcie.yaml | 26 +++++++++++++++++++
>> 1 file changed, 26 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/pci/qcom,pcie.yaml b/Documentation/devicetree/bindings/pci/qcom,pcie.yaml
>> index 5214bf7a9045..a93ab3b54066 100644
>> --- a/Documentation/devicetree/bindings/pci/qcom,pcie.yaml
>> +++ b/Documentation/devicetree/bindings/pci/qcom,pcie.yaml
>> @@ -559,6 +559,32 @@ allOf:
>> contains:
>> enum:
>> - qcom,pcie-sm8150
>> + then:
>> + properties:
>> + clocks:
>> + minItems: 8
>> + maxItems: 8
>> + clock-names:
>> + items:
>> + - const: pipe # PIPE clock
>> + - const: aux # Auxiliary clock
>> + - const: cfg # Configuration clock
>> + - const: bus_master # Master AXI clock
>> + - const: bus_slave # Slave AXI clock
>> + - const: slave_q2a # Slave Q2A clock
>> + - const: tbu # PCIe TBU clock
>> + - const: ref # REFERENCE clock
>
> Can we change the order of the tbu and ref clocks and fold this into
> the sc810x case?

I prefer not, because this is an ABI-concern and we are supposed to keep
things stable.

Best regards,
Krzysztof