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Date:   Fri, 12 Apr 2019 15:41:46 -0700
From:   Douglas Anderson <>
To:     Rob Herring <>,
        Minas Harutyunyan <>,
        Heiko Stuebner <>,
        Felipe Balbi <>
Cc:,,, Randy Li <>,,,,
        Elaine Zhang <>,
        Douglas Anderson <>,,,
        Greg Kroah-Hartman <>,
        Mark Rutland <>
Subject: [PATCH 1/4] dt-bindings: usb: dwc2: Document quirk to reset PHY upon wakeup

On Rockchip rk3288 there's a hardware quirk where we need to assert
the reset signal to the PHY when we get a remote wakeup on one of the
two ports.  Document this quirk in the bindings.

Signed-off-by: Douglas Anderson <>

 Documentation/devicetree/bindings/usb/dwc2.txt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/dwc2.txt b/Documentation/devicetree/bindings/usb/dwc2.txt
index 6dc3c4a34483..f70f3aee4bfc 100644
--- a/Documentation/devicetree/bindings/usb/dwc2.txt
+++ b/Documentation/devicetree/bindings/usb/dwc2.txt
@@ -37,6 +37,8 @@ Refer to phy/phy-bindings.txt for generic phy consumer properties
 - g-rx-fifo-size: size of rx fifo size in gadget mode.
 - g-np-tx-fifo-size: size of non-periodic tx fifo size in gadget mode.
 - g-tx-fifo-size: size of periodic tx fifo per endpoint (except ep0) in gadget mode.
+- snps,reset-phy-on-wake: If present indicates that we need to reset the PHY when
+                          we detect a wakeup.  This is due to a hardware errata.
 Deprecated properties:
 - g-use-dma: gadget DMA mode is automatically detected

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