Hi Sylvain, On 02/09/2015 06:04 PM, Sylvain Rochet wrote:
Hello Bo, On Mon, Feb 09, 2015 at 05:02:52PM +0800, Bo Shen wrote:Enable usb device port on at91sam9n12ek board. Signed-off-by: Bo Shen <voice.shen@xxxxxxxxx> --- arch/arm/boot/dts/at91sam9n12ek.dts | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/arm/boot/dts/at91sam9n12ek.dts b/arch/arm/boot/dts/at91sam9n12ek.dts index 13bb24e..3e572e5 100644 --- a/arch/arm/boot/dts/at91sam9n12ek.dts +++ b/arch/arm/boot/dts/at91sam9n12ek.dts @@ -120,6 +120,11 @@ }; }; + usb1: gadget@f803c000 { + atmel,vbus-gpio = <&pioB 16 GPIO_ACTIVE_HIGH>; + status = "okay"; + }; +There is an external resistor divider on PB16, acting like a pull-down (R22+R23). PB16 reset state is input, pull-up, schmitt trigger, you need to disable the pull-up in pinctrl this way: usb1: gadget@f803c000 { pinctrl-names = "default"; pinctrl-0 = <&pinctrl_board_usb1>; … } pinctrl … { usb1 { pinctrl_board_usb1: usb1-board { atmel,pins = <AT91_PIOB 16 AT91_PERIPH_GPIO AT91_PINCTRL_DEGLITCH>; /* PB16, no pull up and deglitch */ }; }; };
Thanks. I will add it in next version.
Sylvain
Best Regards, Bo Shen -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
