linux-kernel - Re: [PATCH v8 6/7] dt-bindings: mmc: renesas,sdhi: Add mux-states property

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Message-ID: <aYNjvPS6FVQ3JDmc@shikoro>
Date: Wed, 4 Feb 2026 16:20:28 +0100
From: Wolfram Sang <wsa+renesas@...g-engineering.com>
To: Josua Mayer <josua@...id-run.com>
Cc: Marc Kleine-Budde <mkl@...gutronix.de>,
	Vincent Mailhol <mailhol@...nel.org>, Vinod Koul <vkoul@...nel.org>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Peter Rosin <peda@...ntia.se>, Aaro Koskinen <aaro.koskinen@....fi>,
	Andreas Kemnade <andreas@...nade.info>,
	Kevin Hilman <khilman@...libre.com>,
	Roger Quadros <rogerq@...nel.org>, Tony Lindgren <tony@...mide.com>,
	Janusz Krzysztofik <jmkrzyszt@...il.com>,
	Vignesh R <vigneshr@...com>, Andi Shyti <andi.shyti@...nel.org>,
	Ulf Hansson <ulf.hansson@...aro.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>,
	Yazan Shhady <yazan.shhady@...id-run.com>,
	Jon Nettleton <jon@...id-run.com>,
	Mikhail Anikin <mikhail.anikin@...id-run.com>,
	linux-can@...r.kernel.org, linux-phy@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
	linux-i2c@...r.kernel.org, linux-mmc@...r.kernel.org,
	devicetree@...r.kernel.org, linux-renesas-soc@...r.kernel.org
Subject: Re: [PATCH v8 6/7] dt-bindings: mmc: renesas,sdhi: Add mux-states
 property

On Tue, Feb 03, 2026 at 03:01:39PM +0200, Josua Mayer wrote:
> Add mux controller support for data or control lines that are muxed
> between a host and multiple cards.
> 
> There are several devices supporting a choice of eMMC or SD on a single
> board by both dip switch and gpio, e.g. Renesas RZ/G2L SMARC SoM and
> SolidRun RZ/G2L SoM.
> 
> In-tree dts for the Renesas boards currently rely on preprocessor macros
> and gpio hogs to describe the respective cards.
> 
> By adding mux-states property to sdhi controller description, boards can
> correctly describe the mux that already exists in hardware - and drivers
> can coordinate between mux selection and probing for cards.
> 
> Acked-by: Rob Herring (Arm) <robh@...nel.org>
> Signed-off-by: Josua Mayer <josua@...id-run.com>

Reviewed-by: Wolfram Sang <wsa+renesas@...g-engineering.com>