Documentation: dt: kona-sdhci: Add clocks property

The Kona SDHCI block requires a clock that must be specified in the
device tree.  Update the documentation to reflect this requirement.

Signed-off-by: Tim Kryger <tim.kryger@linaro.org>
Reviewed-by: Matt Porter <matt.porter@linaro.org>
Signed-off-by: Christian Daudt <bcm@fixthebug.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/mmc/kona-sdhci.txt b/Documentation/devicetree/bindings/mmc/kona-sdhci.txt
index 789fb07a426d..aaba2483b4ff 100644
--- a/Documentation/devicetree/bindings/mmc/kona-sdhci.txt
+++ b/Documentation/devicetree/bindings/mmc/kona-sdhci.txt
@@ -6,12 +6,16 @@ and the properties present in the bcm281xx SDHCI
 Required properties:
 - compatible : Should be "brcm,kona-sdhci"
 - DEPRECATED: compatible : Should be "bcm,kona-sdhci"
+- clocks: phandle + clock specifier pair of the external clock
+
+Refer to clocks/clock-bindings.txt for generic clock consumer properties.
 
 Example:
 
 sdio2: sdio@0x3f1a0000 {
         compatible = "brcm,kona-sdhci";
         reg = <0x3f1a0000 0x10000>;
+        clocks = <&sdio3_clk>;
         interrupts = <0x0 74 0x4>;
 };