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    ARM: ux500: fix MMC/SD card regression · 1d8aca9d
    Linus Walleij 提交于
    Ux500 is regressing due to commit
    a21763a0
    "pinctrl: nomadik: activate strict mux mode" which disallows
    Nomadik GPIO 5 to be muxed in as a level shifter voltage select
    pin, as it is currently described as being used for RX on UART1.
    
    The behaviour is correct, instead the hardware config has been
    incorrecly specified: UART1 is indeed unused on HREFv60plus and
    Snowball and that is why HREFv60plus can use the pins it would
    normally occupy as the voltage select line for the MMC/SD
    levelshifter (Snowball uses it for I2C4).
    
    The reason UART1 was anyway enabled on these platforms was
    probably to secure the port enumeration to userspace. This
    can be solved by using aliases (done in a separate patch) so
    we can now deactivate UART1 and let MMC/SD use it properly
    on HREFv60plus. We explicitly activate it only for the
    older HREFprev60 board.
    
    To complete, we set up the pin configuration for these pins
    properly in the sdi0 node.
    
    Cc: Ulf Hansson <ulf.hansson@linaro.org>
    Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
    Signed-off-by: NOlof Johansson <olof@lixom.net>
    1d8aca9d
ste-snowball.dts 12.7 KB