Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 28c2a62b authored by Shawn Guo's avatar Shawn Guo Committed by Chris Ball
Browse files

mmc: dt: bus-width can be an optional property 



None of mmc drivers implements bus-width as a required device tree
property.  Instead, some drivers like atmel-mci, dw_mmc, sdhci-s3c
implement it as an optional one, and will force bus width to be 1
when the property is absent.  Let's change the common binding to
reflect what the drivers are usually doing.

Signed-off-by: default avatarShawn Guo <shawn.guo@linaro.org>
Signed-off-by: default avatarChris Ball <cjb@laptop.org>
parent af51079e

Documentation/devicetree/bindings/mmc/mmc.txt

+2 −3
Original line number Diff line number Diff line
@@ -6,9 +6,6 @@ Interpreted by the OF core: 
- reg: Registers location and length.

- interrupts: Interrupts used by the MMC controller.



Required properties:

- bus-width: Number of data lines, can be <1>, <4>, or <8>



Card detection:

If no property below is supplied, host native card detect is used.

Only one of the properties in this section should be supplied:
@@ -17,6 +14,8 @@ Only one of the properties in this section should be supplied: 
  - non-removable: non-removable slot (like eMMC); assume always present.



Optional properties:

- bus-width: Number of data lines, can be <1>, <4>, or <8>.  The default

  will be <1> if the property is absent.

- wp-gpios: Specify GPIOs for write protection, see gpio binding

- cd-inverted: when present, polarity on the cd gpio line is inverted

- wp-inverted: when present, polarity on the wp gpio line is inverted