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

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Message-ID: <f643cbbb-9e23-4e88-a2a9-01077d466c12@solid-run.com>
Date: Mon, 9 Feb 2026 10:21:28 +0000
From: Josua Mayer <josua@...id-run.com>
To: Ulf Hansson <ulf.hansson@...aro.org>
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-can@...r.kernel.org>, "linux-phy@...ts.infradead.org"
	<linux-phy@...ts.infradead.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "linux-omap@...r.kernel.org"
	<linux-omap@...r.kernel.org>, "linux-i2c@...r.kernel.org"
	<linux-i2c@...r.kernel.org>, "linux-mmc@...r.kernel.org"
	<linux-mmc@...r.kernel.org>, "devicetree@...r.kernel.org"
	<devicetree@...r.kernel.org>, "linux-renesas-soc@...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 09/02/2026 11:57, Ulf Hansson wrote:
> 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.

Okay, I'll send a minimal patch to fix the build error only in that case.

Thanks!