linux-kernel - Re: [PATCH 00/37] arm64: Add initial device trees for Apple M2 Pro/Max/Ultra devices

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Message-ID: <932e0085-c901-40f8-b0d5-67f8f0b934e6@gmail.com>
Date: Fri, 29 Aug 2025 00:11:40 +0800
From: Nick Chan <towinchenmi@...il.com>
To: Janne Grunau <j@...nau.net>, Sven Peter <sven@...nel.org>,
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Cc: asahi@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-pm@...r.kernel.org, iommu@...ts.linux.dev, linux-gpio@...r.kernel.org,
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 linux-sound@...r.kernel.org, linux-spi@...r.kernel.org,
 linux-nvme@...ts.infradead.org
Subject: Re: [PATCH 00/37] arm64: Add initial device trees for Apple M2
 Pro/Max/Ultra devices

Janne Grunau 於 2025/8/28 晚上10:01 寫道:
> This series adds device trees for Apple's M2 Pro, Max and Ultra based
> devices. The M2 Pro (t6020), M2 Max (t6021) and M2 Ultra (t6022) SoCs
> follow design of the t600x family so copy the structure of SoC *.dtsi
> files.
[...]
> After discussion with the devicetree maintainers we agreed to not extend
> lists with the generic compatibles anymore [1]. Instead either the first
> compatible SoC or t8103 is used as fallback compatible supported by the
> drivers. t8103 is used as default since most drivers and bindings were
> initially written for M1 based devices.
>
> The series adds those fallback compatibles to drivers where necessary,
> annotates the SoC lists for generic compatibles as "do not extend" and
> adds t6020 per-SoC compatibles.

The series is inconsistent about the use of generic fallback compatibles.

"apple,aic2", "apple,s5l-fpwm", "apple,asc-mailbox-v4" is still used.

[...]

Best regards,
Nick Chan