devicetree: Update binding for pinctrl in arasan SD driver

Add optional pinctrl description to binding document.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --git a/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt b/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt
index 00458af777ff14e9232374c75b751a26be39be34..74f45522b4bb04d4261dcf564fc39244df508e34 100644 (file)
--- a/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt
+++ b/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt
@@ -47,6 +47,8 @@ Optional Properties:
   - xlnx,fails-without-test-cd: when present, the controller doesn't work when
     the CD line is not connected properly, and the line is not connected
     properly. Test mode can be used to force the controller to function.
+ - pinctrl-0: pin control group to be used for this controller.
+ - pinctrl-names: must contain a "default" entry.
 
 Example:
        sdhci@e0100000 {