From 6e9e318b304fd7373a0754805a76a02ddbc69a41 Mon Sep 17 00:00:00 2001 From: Haijun Zhang Date: Mon, 26 Aug 2013 09:19:22 +0800 Subject: 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 Acked-by: Anton Vorontsov Signed-off-by: Chris Ball --- Documentation/devicetree/bindings/mmc/fsl-esdhc.txt | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/mmc/fsl-esdhc.txt b/Documentation/devicetree/bindings/mmc/fsl-esdhc.txt index bd9be0b..b7943f3 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>; }; -- cgit v1.1