MLK-14947-3 usb: doc: chipidea: imx: add power-polarity-active-high property

USB host vbus control can be via port power(PP) bit of ehci, there
is a polarity setting in controller register for this signal, if
power supply chip use active high, add this property.

Acked-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Li Jun <jun.li@nxp.com>

diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
index db7bc37..cfe0be6 100644 (file)
--- a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
+++ b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
@@ -96,6 +96,9 @@ i.mx specific properties
 - osc-clkgate-delay: the delay between powering up the xtal 24MHz clock
   and release the clock to the digital logic inside the analog block,
   0 <= osc-clkgate-delay <= 7.
+- power-polarity-active-high: add this property if port power function of ehci
+  is used to enable vbus, and the vbus power supply chip enable signal is high
+  active.
 
 Examples: