linux-kernel - Re: [PATCH 0/2] Apple mailbox fixup: switch to generic compatibles

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Message-ID: <caf8a7a4-bdb9-e1c9-871d-12c8d146376c@marcan.st>
Date:   Mon, 13 Dec 2021 12:55:39 +0900
From:   Hector Martin <marcan@...can.st>
To:     Sven Peter <sven@...npeter.dev>,
        Jassi Brar <jassisinghbrar@...il.com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Alyssa Rosenzweig <alyssa@...enzweig.io>,
        Mark Kettenis <kettenis@...nbsd.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH 0/2] Apple mailbox fixup: switch to generic compatibles

On 10/12/2021 01.33, Sven Peter wrote:
> On Thu, Dec 9, 2021, at 06:50, Hector Martin wrote:
>> Hi folks,
>>
>> Just a quick fix for the Apple mailbox compatible. Similar to [1], we
>> intend to use SoC-specific compatibles only for potential quirks, and
>> rely on a generic compatible to allow for forward-compatibility as long
>> as things don't break.
> 
> I vaguely remember a brief discussion about this and I think we thought about
> using "t6000-asc", "t8103-asc" in this case since this specific mailbox hardware
> was only introduced in the M1. I think Apple calls this variant ascwrap-v4
> and m3wrap-v2.
> 
> Doing it like you suggested is also fine with me though.

I think I remember that one... seems this is ascwrap-v4 in t8101 too, so 
not quite introduced with M1. But that one doesn't have m3wraps (or 
doesn't use them).

Since Apple do have some kind of sane versioning for these it seems, 
maybe we should follow their numbers and call them apple,asc-mailbox-v4 
and apple,m3-mailbox-v2?

-- 
Hector Martin (marcan@...can.st)
Public Key: https://mrcn.st/pub