Re: [PATCH v3] dt-bindings: pinctrl: qcom,sm8450-lpass-lpi-pinctrl: Add SA8775P and QCS8300 pinctrl

[Mohammad Rafi Shaik <mohammad.rafi.shaik@oss.qualcomm.com>]

On 1/27/2026 7:47 PM, Rob Herring wrote:
> On Tue, Jan 27, 2026 at 04:25:11PM +0530, Mohammad Rafi Shaik wrote:
>> Document compatible for Qualcomm SA8775P and QCS8300 SoC LPASS TLMM
>> pin controller, fully compatible with previous SM8450 generation
>> (same amount of pins and functions).
>>
>> Signed-off-by: Mohammad Rafi Shaik <mohammad.rafi.shaik@oss.qualcomm.com>
>> ---
>> changes in [v3]:
>>   - Removed the duplicate driver code patch as suggested by Krzysztof.
>>   - Reused the existing SM8490 pinctrl, which is fully compatible with SA8775P and QCS8300.
>>   - Link to V2: https://lore.kernel.org/all/20260107192007.500995-1-mohammad.rafi.shaik@oss.qualcomm.com/
>>
>> changes in [v2]:
>>   - Fixed dt-binding errors reported by Krzysztof and Rob.
>>   - Added proper slew rate value for wsa2_swr_data GPIO, as suggested by Konrad.
>>   - Documented Monaco compatible as suggested by Konrad.
>>   - Link to V1: https://lore.kernel.org/all/20251116171656.3105461-1-mohammad.rafi.shaik@oss.qualcomm.com/
>> ---
>>   .../pinctrl/qcom,sm8450-lpass-lpi-pinctrl.yaml         | 10 +++++++++-
>>   1 file changed, 9 insertions(+), 1 deletion(-)
>>
>> diff --git a/Documentation/devicetree/bindings/pinctrl/qcom,sm8450-lpass-lpi-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/qcom,sm8450-lpass-lpi-pinctrl.yaml
>> index e7565592d..354629c38 100644
>> --- a/Documentation/devicetree/bindings/pinctrl/qcom,sm8450-lpass-lpi-pinctrl.yaml
>> +++ b/Documentation/devicetree/bindings/pinctrl/qcom,sm8450-lpass-lpi-pinctrl.yaml
>> @@ -15,7 +15,15 @@ description:
>>   
>>   properties:
>>     compatible:
>> -    const: qcom,sm8450-lpass-lpi-pinctrl
>> +    oneOf:
>> +      - const: qcom,sm8450-lpass-lpi-pinctrl
>> +      - items:
>> +          - enum:
>> +              - qcom,qcs8300-lpass-lpi-pinctrl
>> +              - qcom,sa8775p-lpass-lpi-pinctrl
>> +          - const: qcom,sm8450-lpass-lpi-pinctrl
>> +        minItems: 1
>> +        maxItems: 2
> 
> No. You are either backwards compatible with sm8450 or you aren't. The
> h/w is fixed.
> 

ACK,

Agree,

Need backward compatibility with sm8450 for both sa8775p and qcs8300 as 
they must fall back to the sm8450, so initially used enum to pick 
between the sa8775p and qcs8300 compatibles. I see enum isn’t 
appropriate here since fixed h/w.

will use the const instead of enum like below.

  properties:
    compatible:
-    const: qcom,sm8450-lpass-lpi-pinctrl
+    oneOf:
+      - const: qcom,sm8450-lpass-lpi-pinctrl
+      - items:
+          - const: qcom,sa8775p-lpass-lpi-pinctrl
+          - const: qcom,sm8450-lpass-lpi-pinctrl
+
+      - items:
+          - const: qcom,qcs8300-lpass-lpi-pinctrl
+          - const: qcom,sm8450-lpass-lpi-pinctrl


Thanks & Regards,
Rafi

> Rob