linux-kernel - Re: [PATCH v1] dts: arm64: freescale: move imx9*-clock.h imx9*-power.h into dt-bindings

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Message-ID: <636f24ff-e775-468e-a13b-b86542098c74@mailbox.org>
Date: Sun, 2 Nov 2025 18:42:26 +0100
From: Marek Vasut <marek.vasut@...lbox.org>
To: Peng Fan <peng.fan@....com>, "Peng Fan (OSS)" <peng.fan@....nxp.com>
Cc: Krzysztof Kozlowski <krzk@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
 Sascha Hauer <s.hauer@...gutronix.de>,
 Pengutronix Kernel Team <kernel@...gutronix.de>,
 Fabio Estevam <festevam@...il.com>, Abel Vesa <abelvesa@...nel.org>,
 Michael Turquette <mturquette@...libre.com>, Stephen Boyd
 <sboyd@...nel.org>, "devicetree@...r.kernel.org"
 <devicetree@...r.kernel.org>, "imx@...ts.linux.dev" <imx@...ts.linux.dev>,
 "linux-arm-kernel@...ts.infradead.org"
 <linux-arm-kernel@...ts.infradead.org>,
 "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
 "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
 E Shattow <e@...eshell.de>, Geert Uytterhoeven <geert@...ux-m68k.org>,
 Wolfram Sang <wsa+renesas@...g-engineering.com>
Subject: Re: [PATCH v1] dts: arm64: freescale: move imx9*-clock.h
 imx9*-power.h into dt-bindings

On 9/10/25 9:07 AM, Peng Fan wrote:

Hello Peng,

>>> Marek,
>>>     Some U-Boot code indeed directly use the IDs to configure the clock
>> without
>>>     relying on any drivers. Since the SCMI IDs could not be moved to
>>> dt-bindings,
>>
>> Why can they not be moved to DT bindings ?
> 
> DT maintainers suggested to keep the files under
> arch/arm64/boot/dts/freescale/
> 
> https://lore.kernel.org/all/75ab9162-ed02-479d-92a1-7cfabff6b32e@linaro.org/

I think the larger question really is -- are the SCMI clock IDs part of 
DT ABI or not ? The SCMI clock IDs are part of firmware ABI, for sure. 
Does that imply they are part of DT ABI too ?

Or, is there by any chance a plan to allow e.g. resolution of SCMI clock 
IDs by their shortnames, and allow SCMI clock IDs to change across 
different firmware versions, even on the same platform ?

-- 
Best regards,
Marek Vasut