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dt-bindings: usb-xhci: add xhci-slow-suspend property

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Add a new property "xhci-slow-suspend" for some xHCI controllers
(e.g. Rockchip SoCs) which are integrated in DWC3 IP, they need
an extraordinary delay to wait for xHCI enter the Halted state
(i.e. HCH in the USBSTS register is '1'), especially if DWC3 is
in DRD mode.

Change-Id: Iffda2125ce403dd2ea9ca47b779580bdc3303b41
Signed-off-by: William Wu <william.wu@rock-chips.com>
This commit is contained in:
William Wu
2019-04-08 14:39:10 +08:00
committed by Tao Huang
parent a1521fdae4
commit bdb3b4fbfb
1 changed files with 2 additions and 0 deletions
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2
Documentation/devicetree/bindings/usb/usb-xhci.txt
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@@ -36,6 +36,8 @@ Optional properties:
- usb2-lpm-disable: indicate if we don't want to enable USB2 HW LPM
- usb3-lpm-capable: determines if platform is USB3 LPM capable
- quirk-broken-port-ped: set if the controller has broken port disable mechanism
- xhci-slow-suspend: set if it needs an extraordinary delay to wait
for xHC enter the Halted state after the Run/Stop (R/S) bit is cleared to '0'
- imod-interval-ns: default interrupt moderation interval is 5000ns
- phys : see usb-hcd.txt in the current directory