diff options
| author | Shawn Guo <shawn.guo@linaro.org> | 2013-01-28 16:49:11 -0500 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2013-02-24 14:37:04 -0500 |
| commit | 28c2a62bd53300784b9e6815ae115fb888ac3cfd (patch) | |
| tree | ba72c57024ffef01df95c93d3ccec734125c8d9b /Documentation/devicetree | |
| parent | af51079e68d4759e458b0592df5d1fab373c43ae (diff) | |
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: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'Documentation/devicetree')
| -rw-r--r-- | Documentation/devicetree/bindings/mmc/mmc.txt | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt index 34f28ed97928..469cf53d5a92 100644 --- a/Documentation/devicetree/bindings/mmc/mmc.txt +++ b/Documentation/devicetree/bindings/mmc/mmc.txt @@ -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 |