linux-kernel - Re: [PATCH] ARM: dts: ux500: Use "arm,pl031" compatible for PL031

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Message-ID: <CACRpkdYnR3jYtrEWyKf=fi2c1Mvype9FeiKKmoLjK+1R73iVBQ@mail.gmail.com>
Date:   Wed, 27 Nov 2019 15:00:06 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Stephan Gerhold <stephan@...hold.net>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ARM: dts: ux500: Use "arm,pl031" compatible for PL031

On Sun, Nov 24, 2019 at 9:52 PM Stephan Gerhold <stephan@...hold.net> wrote:

> The Ux500 device tree uses "arm,rtc-pl031" as compatible for PL031.
> All other boards in Linux describe it using "arm,pl031" instead.
> This works because the compatible is not actually used in Linux:
> AMBA devices get probed based on "arm,primecell" and their peripheral ID.
>
> Nevertheless, some other projects (e.g. U-Boot) rely on the compatible
> to probe the device with the correct driver. Those will look for
> "arm,pl031" instead of "arm,rtc-pl031", preventing the RTC from being
> probed.
>
> Change it to "arm,pl031" to match all other boards.
>
> Signed-off-by: Stephan Gerhold <stephan@...hold.net>

Patch applied.

Yours,
Linus Walleij