linux-kernel - Re: [PATCH 1/4] arm64: dts: ti: k3-j721e-main: Make the "scm

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Message-ID: <0c69137d-93ad-4843-8512-9885b9cba452@ti.com>
Date: Wed, 4 Jun 2025 15:18:40 +0530
From: Jayesh Choudhary <j-choudhary@...com>
To: Krzysztof Kozlowski <krzk@...nel.org>, <nm@...com>, <vigneshr@...com>,
        <devicetree@...r.kernel.org>
CC: <kristo@...nel.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
        <conor+dt@...nel.org>, <s-vadapalli@...com>, <rogerq@...nel.org>,
        <afd@...com>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 1/4] arm64: dts: ti: k3-j721e-main: Make the "scm_conf"
 node a "simple-bus"

Hello Krzysztof,

On 03/06/25 16:32, Krzysztof Kozlowski wrote:
> On 03/06/2025 11:56, Jayesh Choudhary wrote:
>> The "scm_conf" bus need not be "syscon". Now that we have "pcie*_ctrl"
>> child nodes for "ti,syscon-pcie-ctrl" property in "pcie" nodes, change
>> "scm_conf" node to "simple-bus".
>> Also remove "reg" property as it is not needed by "simple-bus".
> 
> This (possibly) affects all other users of DTS which were expecting this
> ABI. It's not only about forward-compatibility, but other projects.
> 
> Maybe this doe snot matter for you, so explain that in commit msg and
> provide rationale why you are affecting other users.
> 
> 

This should not affect other users of DTS. J784S4 already has this
change and it serves as a validation that DT nodes are compatible
with other projects (for example uboot driver handles it).
Other SoCs are being modified with taking J784S4 as a working reference.

Considering this, do I still need to add something? Or is it okay
since I am not exactly affecting other projects?
Should I add something along the lines of "similar to j784s4...."?


Warm Regards,
Jayesh

> 
> Best regards,
> Krzysztof