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04a8ddc39e
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. Acked-by: Conor Dooley <conor.dooley@microchip.com> Signed-off-by: Iker Pedrosa <ikerpedrosam@gmail.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>