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

[Josua Mayer <josua@solid-run.com>]

On 09/02/2026 11:57, Ulf Hansson wrote:
> On Sun, 8 Feb 2026 at 16:39, Josua Mayer <josua@solid-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@solid-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@kernel.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!