[PATCH v7 1/9] dt-bindings: mmc: spacemit,sdhci: add pinctrl support for voltage switching

Conor Dooley conor at kernel.org
Mon Apr 13 08:43:05 PDT 2026


On Mon, Apr 13, 2026 at 09:24:43AM +0200, Iker Pedrosa wrote:
> Document pinctrl properties to support voltage-dependent pin
> configuration switching for UHS-I SD card modes.
> 
> Add optional pinctrl-names property with two states:
> - "default": For 3.3V operation with standard drive strength
> - "state_uhs": For 1.8V operation with optimized drive strength
> 
> These pinctrl states allow the SDHCI driver to coordinate voltage
> switching with pin configuration changes, ensuring proper signal
> integrity during UHS-I mode transitions.
> 
> Signed-off-by: Iker Pedrosa <ikerpedrosam at gmail.com>

Acked-by: Conor Dooley <conor.dooley at microchip.com>
pw-bot: not-applicable
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