From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sylvain Rochet Subject: Re: [PATCH 3/3] ARM: at91: dt: at91sam9n12ek: enable udp Date: Mon, 9 Feb 2015 11:04:04 +0100 Message-ID: <20150209100404.GA17242@gradator.net> References: <1423472572-19824-1-git-send-email-voice.shen@atmel.com> <1423472572-19824-4-git-send-email-voice.shen@atmel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Content-Disposition: inline In-Reply-To: <1423472572-19824-4-git-send-email-voice.shen-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org> Sender: linux-usb-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Bo Shen Cc: balbi-l0cyMroinI0@public.gmane.org, nicolas.ferre-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org List-Id: devicetree@vger.kernel.org Hello Bo, On Mon, Feb 09, 2015 at 05:02:52PM +0800, Bo Shen wrote: > Enable usb device port on at91sam9n12ek board. >=20 > Signed-off-by: Bo Shen > --- >=20 > arch/arm/boot/dts/at91sam9n12ek.dts | 5 +++++ > 1 file changed, 5 insertions(+) >=20 > 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 @@ > }; > }; > =20 > + usb1: gadget@f803c000 { > + atmel,vbus-gpio =3D <&pioB 16 GPIO_ACTIVE_HIGH>; > + status =3D "okay"; > + }; > + There is an external resistor divider on PB16, acting like a pull-down=20 (R22+R23). PB16 reset state is input, pull-up, schmitt trigger, you nee= d=20 to disable the pull-up in pinctrl this way: usb1: gadget@f803c000 { pinctrl-names =3D "default"; pinctrl-0 =3D <&pinctrl_board_usb1>; =E2=80=A6 } pinctrl =E2=80=A6 { usb1 { pinctrl_board_usb1: usb1-board { atmel,pins =3D = ; /* PB16, no pull up and deglitch */ }; }; }; Sylvain -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html