linux-kernel - Re: [PATCH 2/9] dt-bindings: pinctrl: stm32: Introduce HDP

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Message-ID: <91f19306-4b31-41fe-8ad2-680b1a339204@foss.st.com>
Date: Tue, 25 Feb 2025 16:51:35 +0100
From: Clement LE GOFFIC <clement.legoffic@...s.st.com>
To: Krzysztof Kozlowski <krzk@...nel.org>,
        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>,
        Bartosz Golaszewski <brgl@...ev.pl>
CC: <linux-kernel@...r.kernel.org>, <linux-gpio@...r.kernel.org>,
        <devicetree@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 2/9] dt-bindings: pinctrl: stm32: Introduce HDP

On 2/25/25 14:04, Krzysztof Kozlowski wrote:
> On 25/02/2025 09:48, Clément Le Goffic wrote:
>> +
>> +maintainers:
>> +  - Clément LE GOFFIC <clement.legoffic@...s.st.com>
>> +
>> +description: |
> 
> 
> Do not need '|' unless you need to preserve formatting.

Ok

>> +  STMicroelectronics's STM32 MPUs integrate a Hardware Debug Port (HDP).
>> +  It allows to output internal signals on SoC's GPIO.
>> +
>> +properties:
>> +  compatible:
>> +    const: st,stm32mp-hdp
> 
> There is a mess in STM SoCs. Sometimes you call SoC stm32, sometimes
> stm32mp and sometimes stm32mpXX.
> 
> Define for all your STM contributions what is the actual SoC. This
> feedback was already given to ST.
> 
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +  clocks:
>> +    maxItems: 1
>> +
>> +patternProperties:
>> +  '-pins$':
>> +    type: object
>> +    $ref: pinmux-node.yaml#
>> +
>> +    properties:
>> +      function:
>> +        enum: [ "0", "1", "2", "3", "4", "5", "6", "7",
>> +                "8", "9", "10", "11", "12", "13", "14",
>> +                "15" ]
> 
> Function which has a number is not really useful. What does it even express?

As said in my previous answer, function names are very different from 
one platform to another. Numbers were used as string to be generic.
I'll consider it in a V2.

> 
>> +
>> +      pins:
>> +        enum: [ hdp0, hdp1, hdp2, hdp3, hdp4, hdp5, hdp6, hdp7 ]
>> +
>> +    required:
>> +      - function
>> +      - pins
>> +
>> +    additionalProperties: false
>> +
>> +allOf:
>> +  - $ref: pinctrl.yaml#
>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +  - clocks
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> +  - |
>> +    #include <dt-bindings/clock/stm32mp1-clks.h>
>> +    #include <dt-bindings/pinctrl/stm32mp15-hdp.h>
>> +    //Example 1
> 
> Drop

Ok

> 
> Best regards,
> Krzysztof