linux-kernel - [PATCH v2 1/4] dt-bindings: usb: dwc2: Document quirk to reset PHY upon wakeup

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Date:   Tue, 16 Apr 2019 14:53:48 -0700
From:   Douglas Anderson <dianders@...omium.org>
To:     Rob Herring <robh+dt@...nel.org>,
        Minas Harutyunyan <hminas@...opsys.com>,
        Heiko Stuebner <heiko@...ech.de>,
        Felipe Balbi <felipe.balbi@...ux.intel.com>
Cc:     amstan@...omium.org, linux-rockchip@...ts.infradead.org,
        linux-usb@...r.kernel.org, Randy Li <ayaka@...lik.info>,
        mka@...omium.org, ryandcase@...omium.org, jwerner@...omium.org,
        Elaine Zhang <zhangqing@...k-chips.com>,
        Douglas Anderson <dianders@...omium.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mark Rutland <mark.rutland@....com>
Subject: [PATCH v2 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 <dianders@...omium.org>
Reviewed-by: Matthias Kaehlcke <mka@...omium.org>
---

Changes in v2: None

 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
-- 
2.21.0.593.g511ec345e18-goog