linux-kernel - Re: [PATCH v9 0/7] mmc: host: renesas_sdhi_core: support configuring an optional sdio mux

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Message-ID: <CAPDyKFpbpcg3ei51hEcG5FzJL7tK44PdBcMbxfOdON7ozxP2Xg@mail.gmail.com>
Date: Mon, 9 Feb 2026 10:57:09 +0100
From: Ulf Hansson <ulf.hansson@...aro.org>
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>, 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>, 
	Wolfram Sang <wsa+renesas@...g-engineering.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 v9 0/7] mmc: host: renesas_sdhi_core: support configuring
 an optional sdio mux

On Sun, 8 Feb 2026 at 16:39, Josua Mayer <josua@...id-run.com> wrote:
>
> Some Renesas SoC based boards mux SD and eMMC on a single sdio
> controller, exposing user control by dip switch and software control by
> gpio.
>
> Purpose is to simplify development and provisioning by selecting boot
> media at power-on, and again before starting linux.
>
> Add binding and driver support for linking a (gpio) mux to renesas sdio
> controller.
>
> Introduce generic helper functions for getting managed and selected
> mux-state objects, and switch i2c-omap and phy-can-transceiver drivers.
>
> Signed-off-by: Josua Mayer <josua@...id-run.com>
> ---
> Changes in v9:
> - compile-tested on x86 with MULTIPLEXER=m/y/unset.
> - fixed Kconfig changes so that CONFIG_MULTIPLEXER can be selected.
>   through menuconfig / .config as intended.
> - updated trailers
> - document null return value for mux_control_get_optional.
> - fix build error for CONFIG_MULTIPLEXER=m, found with x86_64
>   allmodconfig: replaced ifdef ... with if IS_ENABLED(...).
>   (Reported-by: Mark Brown <broonie@...nel.org>)
> - Link to v8: https://lore.kernel.org/r/20260203-rz-sdio-mux-v8-0-024ea405863e@solid-run.com

[...]

I have already applied for v8 and it's going to be in my pull-request
for v7.0 in a few hours.

Please send incremental fixes on top instead of a new version of the
series, then I can pick them as fixes for v7.0.

Kind regards
Uffe