[PATCH 1/2] dt-bindings: usb: ehci: Add clocks description for R-Car Gen3

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This patch adds detailed information of an optional property "clocks"
description for R-Car Gen3.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
---
 Documentation/devicetree/bindings/usb/usb-ehci.txt | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/usb/usb-ehci.txt b/Documentation/devicetree/bindings/usb/usb-ehci.txt
index 0f1b753..406252d 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
 
-- 
1.9.1




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