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| author | Linus Walleij <linus.walleij@linaro.org> | 2022-04-17 16:42:23 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2022-04-26 14:05:22 +0200 |
| commit | de6e855b28f4c54eb04582cd468c6fa17577c8cc (patch) | |
| tree | 03e215a5ccb0f6d9dc6ddb8150a7ee0a81f173f7 /Documentation/devicetree/bindings/mmc | |
| parent | f7ad75041ba9b36d8141a1c0dd527154ed10b96e (diff) | |
| download | lwn-de6e855b28f4c54eb04582cd468c6fa17577c8cc.tar.gz lwn-de6e855b28f4c54eb04582cd468c6fa17577c8cc.zip | |
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: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20220417144223.649201-1-linus.walleij@linaro.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'Documentation/devicetree/bindings/mmc')
| -rw-r--r-- | Documentation/devicetree/bindings/mmc/mmc-controller.yaml | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml index 513f3c8758aa..ff5ce89e5111 100644 --- a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml +++ b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml @@ -298,7 +298,10 @@ properties: vqmmc-supply: 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: $ref: /schemas/types.yaml#/definitions/phandle |