• Laxman Dewangan's avatar
    ARM: tegra: cardhu: add dt entry for fixed regulators · fa4a9252
    Laxman Dewangan authored
    Cadhu have multiple power rails which are controlled by
    GPIOs. Add support of these power rail control through
    fixed regulators. Add entry for all fixed regulators for
    cardhu-a02 and a04.
    The details are taken from downstream kernel.
    
    Some points on this change are:
    
    * Add the tps65910-LDO5 entry and make it always ON
     to supply power to SDMMC. Once the sd driver support
     regulator handling, this flag will be remove.
    
    * Dropping registration of rail vdd_sdmmc1 as the gpio
      is used by sdhci power-gpio. This need to fix in
      sdhci driver and then need to add the registration
      mechanism. Just removing power-gpio and adding fixed
      regulator with this gpio is causing the sd  access to
      fail because first probe call of this regulator fails
      due to non-available of parent and so it calls
      gpio_free() which disable the pins in gpio mode make
      pin output to LOW causes power to OFF. In probe retry,
      it got success and it powered-on but it again need to
      do again numeration of card here.
    Signed-off-by: default avatarLaxman Dewangan <ldewangan@nvidia.com>
    Signed-off-by: default avatarStephen Warren <swarren@nvidia.com>
    fa4a9252
tegra30-cardhu-a02.dts 2.04 KB