Commit de6e855b authored by Linus Walleij's avatar Linus Walleij Committed by Ulf Hansson
Browse files

dt-bindings: mmc: Add small binding note on level shifters 



The VQMMC is often provided by a level shifter, so drop a small note
in the bindings that this can be the case and how that is done.
It is helpful information since this is pretty common.

Cc: devicetree@vger.kernel.org
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20220417144223.649201-1-linus.walleij@linaro.org


Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent f7ad7504

Documentation/devicetree/bindings/mmc/mmc-controller.yaml

+4 −1
Original line number Original line Diff line number Diff line
@@ -298,7 +298,10 @@ properties: 




  vqmmc-supply:

  vqmmc-supply:

    description:

    description:

      Supply for the bus IO line power

      Supply for the bus IO line power, such as a level shifter.

      If the level shifter is controlled by a GPIO line, this shall

      be modeled as a "regulator-fixed" with a GPIO line for

      switching the level shifter on/off.





  mmc-pwrseq:

  mmc-pwrseq:

    $ref: /schemas/types.yaml#/definitions/phandle

    $ref: /schemas/types.yaml#/definitions/phandle