linux-kernel - Re: [PATCH] arm64: dts: ensure backward compatibility of the AP807 Xenon

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Date:   Mon, 22 Mar 2021 13:14:22 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Marcin Wojtas <mw@...ihalf.com>
Cc:     linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, gregory.clement@...tlin.com,
        robh+dt@...nel.org
Subject: Re: [PATCH] arm64: dts: ensure backward compatibility of the AP807
 Xenon

On Mon, Mar 22, 2021 at 01:39:15AM +0100, Marcin Wojtas wrote:
> A recent switch to a dedicated AP807 compatible string for the Xenon
> SD/MMC controller result in the driver not being probed when
> using updated device tree with the older kernel revisions.
> It may also be problematic for other OSs/firmware that use
> Linux device tree sources as a reference. Resolve the problem
> with backward compatibility by restoring a previous compatible
> string as secondary one.
> 
> Signed-off-by: Marcin Wojtas <mw@...ihalf.com>

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew