linux-kernel - Re: [PATCH v3 5/9] ARM: dts: stm32: add Hardware debug port (HDP) on stm32mp13

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Message-ID: <714ad17d-53f1-4703-8e13-61c290a8da89@foss.st.com>
Date: Tue, 10 Jun 2025 14:02:34 +0200
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 v3 5/9] ARM: dts: stm32: add Hardware debug port (HDP) on
 stm32mp13

On 5/29/25 11:01, Krzysztof Kozlowski wrote:
> On 28/05/2025 14:14, Clement LE GOFFIC wrote:
>>>
>>>> +		};
>>>> +
>>>> +		hdp: pinctrl@...2a000 {
>>>> +			compatible = "st,stm32mp131-hdp";
>>>> +			reg = <0x5002a000 0x400>;
>>>> +			clocks = <&rcc HDP>;
>>>>    			status = "disabled";
>>>
>>> Why are you disabling it? What is missing?
>>
>> Nothing is missing just disabled by default.
>> The node is then enabled when needed in board's dts file.
> Nodes should not be disabled by default if they are complete. That's why
> I asked what is missing. Drop.

Hi Krzysztof, OK I better understand now.
So yes the 'pinctrl-*' properties which are board dependent are lacking.

In the last patch of my serie I add them (only for stm32mp157f-dk2) but 
keep it disabled because the pin is on an external connector (the 
Arduino connector of the board).
This prevent any issue with a possible connected module.

> Best regards,
> Krzysztof