linux-kernel - Re: [PATCH 11/14] dt-bindings: pinctrl: stm32: support for stm32mp215 and additional packages

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Message-ID: <6d8015dd-f656-4c33-b906-09104cc366b5@kernel.org>
Date: Thu, 24 Oct 2024 15:25:40 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Antonio Borneo <antonio.borneo@...s.st.com>
Cc: Linus Walleij <linus.walleij@...aro.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Maxime Coquelin <mcoquelin.stm32@...il.com>,
 Alexandre Torgue <alexandre.torgue@...s.st.com>,
 Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>,
 linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
 Clément Le Goffic <clement.legoffic@...s.st.com>,
 Stephane Danieau <stephane.danieau@...s.st.com>,
 Amelie Delaunay <amelie.delaunay@...s.st.com>,
 Fabien Dessenne <fabien.dessenne@...s.st.com>,
 Valentin Caron <valentin.caron@...s.st.com>,
 Gatien Chevallier <gatien.chevallier@...s.st.com>,
 Cheick Traore <cheick.traore@...s.st.com>,
 linux-stm32@...md-mailman.stormreply.com
Subject: Re: [PATCH 11/14] dt-bindings: pinctrl: stm32: support for stm32mp215
 and additional packages

On 23/10/2024 12:08, Antonio Borneo wrote:
> On Wed, 2024-10-23 at 10:51 +0200, Krzysztof Kozlowski wrote:
>> On Tue, Oct 22, 2024 at 05:56:55PM +0200, Antonio Borneo wrote:
>>> From: Amelie Delaunay <amelie.delaunay@...s.st.com>
>>>
>>> Add support for st,stm32mp215-pinctrl and st,stm32mp215-z-pinctrl.
>>
>> So all previous patches are for this? Then they are supposed to be here.
> 
> Hi Krzysztof,
> 
> I'm not sure I fully get your point here.
> The previous patches in this series add the new features to the already upstreamed STM32MP257.
> The same features are also needed here by STM32MP215 and in next patches 12/14 and 13/14 by STM32MP235.

commit msgs could be improved here, sorry, I have no clue for what
devices are you bringing this for. Putting here new SoC clearly suggests
that it is for new Soc, so entire split is incorrect.

> 
>>
>>> Add packages AM, AN and AO (values : 0x1000, 0x2000 and 0x8000)
>>>
>>> Signed-off-by: Amelie Delaunay <amelie.delaunay@...s.st.com>
>>> Signed-off-by: Antonio Borneo <antonio.borneo@...s.st.com>
>>> ---
>>>  .../devicetree/bindings/pinctrl/st,stm32-pinctrl.yaml         | 4 +++-
>>>  include/dt-bindings/pinctrl/stm32-pinfunc.h                   | 3 +++
>>>  2 files changed, 6 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/Documentation/devicetree/bindings/pinctrl/st,stm32-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/st,stm32-pinctrl.yaml
>>> index 9a7ecfea6eb5b..0a2d644dbece3 100644
>>> --- a/Documentation/devicetree/bindings/pinctrl/st,stm32-pinctrl.yaml
>>> +++ b/Documentation/devicetree/bindings/pinctrl/st,stm32-pinctrl.yaml
>>> @@ -27,6 +27,8 @@ properties:
>>>        - st,stm32mp135-pinctrl
>>>        - st,stm32mp157-pinctrl
>>>        - st,stm32mp157-z-pinctrl
>>> +      - st,stm32mp215-pinctrl
>>> +      - st,stm32mp215-z-pinctrl
>>>        - st,stm32mp257-pinctrl
>>>        - st,stm32mp257-z-pinctrl
>>>  
>>> @@ -59,7 +61,7 @@ properties:
>>>        Indicates the SOC package used.
>>>        More details in include/dt-bindings/pinctrl/stm32-pinfunc.h
>>>      $ref: /schemas/types.yaml#/definitions/uint32
>>> -    enum: [0x1, 0x2, 0x4, 0x8, 0x100, 0x400, 0x800]
>>> +    enum: [0x1, 0x2, 0x4, 0x8, 0x100, 0x400, 0x800, 0x1000, 0x2000, 0x4000]
>>>  
>>>  patternProperties:
>>>    '^gpio@[0-9a-f]*$':
>>> diff --git a/include/dt-bindings/pinctrl/stm32-pinfunc.h b/include/dt-bindings/pinctrl/stm32-pinfunc.h
>>> index af3fd388329a0..01bc8be78ef72 100644
>>> --- a/include/dt-bindings/pinctrl/stm32-pinfunc.h
>>> +++ b/include/dt-bindings/pinctrl/stm32-pinfunc.h
>>> @@ -41,6 +41,9 @@
>>>  #define STM32MP_PKG_AI 0x100
>>>  #define STM32MP_PKG_AK 0x400
>>>  #define STM32MP_PKG_AL 0x800
>>> +#define STM32MP_PKG_AM 0x1000
>>> +#define STM32MP_PKG_AN 0x2000
>>> +#define STM32MP_PKG_AO 0x4000
>>
>> Why these are some random hex values but not for example 0x801, 0x802
>> and 0x803? That's an enum, so bitmask does not make sense here.
> 
> The are bitmask. You can check in patch 14/14 that adds a new package to the existing code of STM32MP257.
> Do you prefer I rewrite them all as, e.g.
> #define STM32MP_PKG_AO (1 << 14)
> ?

OK, so where is this bitmask used in DTS? These are bindings, not some
random defines for driver.

Best regards,
Krzysztof