For USB HSIC, the data and strobe pin needs to be pulled down at default, we consider it as "idle" state. When the USB host is ready to be used, the strobe pin needs to be pulled up, we consider it as "active" state. Signed-off-by: Peter Chen <peter.chen@xxxxxxx> --- Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt index 529e51879fb2..1e5e7ddfb1a5 100644 --- a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt +++ b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt @@ -80,7 +80,10 @@ 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-names: Names for optional pin modes in "default", "host", "device". + In case of HSIC-mode, "idle" and "active" pin modes are mandatory. In this + case, the "idle" state needs to pull down the data and strobe pin + and the "active" state needs to pull up the strobe pin. - pinctrl-n: alternate pin modes i.mx specific properties @@ -110,4 +113,7 @@ Example: phy-clkgate-delay-us = <400>; mux-controls = <&usb_switch>; mux-control-names = "usb_switch"; + pinctrl-names = "idle", "active"; + pinctrl-0 = <&pinctrl_usbh2_1>; + pinctrl-1 = <&pinctrl_usbh2_2>; }; -- 2.14.1
