Hello. On 4/26/2015 12:41 PM, Yunzhi Li wrote: > rk3288-firefly board use the dwc2 usb otg controller as a host > controller and the device mode not used, so the dr_mode should be > "host" then the dwc2 usb otg controller will work at host only > mode > Signed-off-by: Yunzhi Li <lyz at rock-chips.com> > --- > arch/arm/boot/dts/rk3288-firefly.dtsi | 1 + > 1 file changed, 1 insertion(+) > diff --git a/arch/arm/boot/dts/rk3288-firefly.dtsi b/arch/arm/boot/dts/rk3288-firefly.dtsi > index e6f873a..a861776 100644 > --- a/arch/arm/boot/dts/rk3288-firefly.dtsi > +++ b/arch/arm/boot/dts/rk3288-firefly.dtsi > @@ -466,6 +466,7 @@ > }; > > &usb_otg { > + dr_modr = "host"; You meant to type "dr_mode". WBR, Sergei