MLK-10930-1 doc: usb: ci-hdrc-imx: add phy-clkgate-delay-us property
It's optional, for delay time between putting phy into low power mode
and turn off PHY clock.
Signed-off-by: Li Jun <jun.li@freescale.com>
diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-imx.txt b/Documentation/devicetree/bindings/usb/ci-hdrc-imx.txt
index ce547ff..2f1a422 100644
--- a/Documentation/devicetree/bindings/usb/ci-hdrc-imx.txt
+++ b/Documentation/devicetree/bindings/usb/ci-hdrc-imx.txt
@@ -32,6 +32,8 @@
0 <= osc-clkgate-delay <= 7.
- maximum-speed: limit the maximum connection speed to "full-speed".
- tpl-support: TPL (Targeted Peripheral List) feature for targeted hosts
+- phy-clkgate-delay-us: the delay time(us) between putting phy into low power
+ mode and gate phy clock.
Examples:
usb@02184000 { /* USB OTG */
@@ -50,4 +52,5 @@
osc-clkgate-delay = <0x3>;
maximum-speed = "full-speed";
tpl-support;
+ phy-clkgate-delay-us = <400>;
};