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doc: usb: ci-hdrc-usb2: Add pinctrl properties definition

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Some hardware implementations require to configure pins differently
according to the USB role (host/device), this can be an update of the
pins routing or a simple GPIO value change.

This patch introduces new optional "host" and "device" pinctrls.
If these pinctrls are defined by the device, they are respectively
selected on host/device role start.

Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
This commit is contained in:
Loic Poulain 2018-09-04 17:18:56 +02:00 committed by Peter Chen
parent 16caf1fa37
commit 1fa9697c85
1 changed files with 2 additions and 0 deletions
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Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
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@ -80,6 +80,8 @@ Optional properties:
controller. It's expected that a mux state of 0 indicates device mode and a
mux state of 1 indicates host mode.
- mux-control-names: Shall be "usb_switch" if mux-controls is specified.
- pinctrl-names: Names for optional pin modes in "default", "host", "device"
- pinctrl-n: alternate pin modes
i.mx specific properties
- fsl,usbmisc: phandler of non-core register device, with one