diff options
| author | Haijun Zhang <Haijun.Zhang@freescale.com> | 2013-08-26 09:19:22 +0800 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2013-08-26 11:31:40 -0400 |
| commit | 6e9e318b304fd7373a0754805a76a02ddbc69a41 (patch) | |
| tree | 43c05fa267bf780264a154e7145fe29aa0ad6c77 /Documentation | |
| parent | bcf24e1daa94f4c52ef7a3f657e43cc6bc50d46b (diff) | |
| download | linux-6e9e318b304fd7373a0754805a76a02ddbc69a41.tar.gz linux-6e9e318b304fd7373a0754805a76a02ddbc69a41.tar.bz2 linux-6e9e318b304fd7373a0754805a76a02ddbc69a41.zip | |
mmc: core: parse voltage from device-tree
Add function to support getting voltage from device-tree.
If voltage-range is specified in device-tree node, this function
will parse it and return the available voltage mask.
Signed-off-by: Haijun Zhang <haijun.zhang@freescale.com>
Acked-by: Anton Vorontsov <anton@enomsg.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/mmc/fsl-esdhc.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mmc/fsl-esdhc.txt b/Documentation/devicetree/bindings/mmc/fsl-esdhc.txt index bd9be0b5bc20..b7943f3f9995 100644 --- a/Documentation/devicetree/bindings/mmc/fsl-esdhc.txt +++ b/Documentation/devicetree/bindings/mmc/fsl-esdhc.txt @@ -19,6 +19,9 @@ Optional properties: "bus-width = <1>" property. - sdhci,auto-cmd12: specifies that a controller can only handle auto CMD12. + - voltage-ranges : two cells are required, first cell specifies minimum + slot voltage (mV), second cell specifies maximum slot voltage (mV). + Several ranges could be specified. Example: @@ -29,4 +32,5 @@ sdhci@2e000 { interrupt-parent = <&ipic>; /* Filled in by U-Boot */ clock-frequency = <0>; + voltage-ranges = <3300 3300>; }; |