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

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Message-ID: <81f0ee3c-a7e3-4730-a396-9599ddd45f53@oss.qualcomm.com>
Date: Thu, 29 Jan 2026 16:03:37 +0530
From: Mohammad Rafi Shaik <mohammad.rafi.shaik@....qualcomm.com>
To: Rob Herring <robh@...nel.org>
Cc: Bjorn Andersson <andersson@...nel.org>, Linus Walleij
 <linusw@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Srinivas Kandagatla <srini@...nel.org>, linux-arm-msm@...r.kernel.org,
        linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] dt-bindings: pinctrl: qcom,sm8450-lpass-lpi-pinctrl:
 Add SA8775P and QCS8300 pinctrl



On 1/27/2026 11:57 PM, Rob Herring wrote:
> On Tue, Jan 27, 2026 at 12:13 PM Mohammad Rafi Shaik
> <mohammad.rafi.shaik@....qualcomm.com> wrote:
>>
>>
>>
>> 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@....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
> 
> Sigh, no. The 2 entries can be combined like you had. Just drop
> minItems and maxItems from what you had.
> 
> And test your binding before sending it.
> 

Sure, I’ll take care of it going forward

Thanks & Regarding,
Rafi.

> Rob