Commit ff964962 authored Jun 23, 2015 by Cyrille Pitchen Committed by Nicolas Ferre Mar 02, 2016

ARM: dts: at91: sama5d2 Xplained: set pin muxing for usb gadget and usb host



For USB gadget on port A (device mode):
- pin PA31 is configured as an input GPIO which triggers an interrupt when
  vbus is detected on USB port A.
- pin PB9 is configured as an output GPIO and set to low level so the
  board doesn't supply vbus to USB port A.

For USB host:
- pin PB10 is configured as an output GPIO and is active at high level.
  The ohci driver will activate this pin so the board supplies vbus to USB
  port B.
- pin PB9 should be configured as an output GPIO and active at high level
  to use to USB port A in host mode (conflicts with USB gadget).

Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

parent 28fe8007

arch/arm/boot/dts/at91-sama5d2_xplained.dts

+21 −0

Original line number	Diff line number	Diff line
		@@ -46,6 +46,7 @@
		#include "sama5d2.dtsi"
		#include "sama5d2-pinfunc.h"
		#include <dt-bindings/mfd/atmel-flexcom.h>
		#include <dt-bindings/gpio/gpio.h>

		/ {
		model = "Atmel SAMA5D2 Xplained";
		@@ -71,11 +72,20 @@

		ahb {
		usb0: gadget@00300000 {
		atmel,vbus-gpio = <&pioA 31 GPIO_ACTIVE_HIGH>;
		pinctrl-names = "default";
		pinctrl-0 = <&pinctrl_usba_vbus>;
		status = "okay";
		};

		usb1: ohci@00400000 {
		num-ports = <3>;
		atmel,vbus-gpio = <0 /* &pioA 41 GPIO_ACTIVE_HIGH */
		&pioA 42 GPIO_ACTIVE_HIGH
		0
		>;
		pinctrl-names = "default";
		pinctrl-0 = <&pinctrl_usb_default>;
		status = "okay";
		};

		@@ -376,6 +386,17 @@
		<PIN_PB12__UTXD3>;
		bias-disable;
		};

		pinctrl_usb_default: usb_default {
		pinmux = <PIN_PB10__GPIO>;
		bias-disable;
		};

		pinctrl_usba_vbus: usba_vbus {
		pinmux = <PIN_PA31__GPIO>;
		bias-disable;
		};

		};
		};
		};