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-rw-r--r--Documentation/devicetree/bindings/usb/usb-ehci.txt6
1 files changed, 5 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/usb/usb-ehci.txt b/Documentation/devicetree/bindings/usb/usb-ehci.txt
index 0f1b75386207f..406252d14c6b3 100644
--- a/Documentation/devicetree/bindings/usb/usb-ehci.txt
+++ b/Documentation/devicetree/bindings/usb/usb-ehci.txt
@@ -15,7 +15,11 @@ Optional properties:
- needs-reset-on-resume : boolean, set this to force EHCI reset after resume
- has-transaction-translator : boolean, set this if EHCI have a Transaction
Translator built into the root hub.
- - clocks : a list of phandle + clock specifier pairs
+ - clocks : a list of phandle + clock specifier pairs. In case of Renesas
+ R-Car Gen3 SoCs:
+ - if a host only channel: first clock should be host.
+ - if a USB DRD channel: first clock should be host and second one
+ should be peripheral.
- phys : see usb-hcd.txt in the current directory
- resets : phandle + reset specifier pair