linux/arch/arm/boot/dts/at91-foxg20.dts

/*
 * at91-foxg20.dts - Device Tree file for Acme Systems FoxG20 board
 *
 * Based on DT files for at91sam9g20ek evaluation board (AT91SAM9G20 SoC)
 *
 * Copyright (C) 2013 Douglas Gilbert <dgilbert@interlog.com>
 *
 * Licensed under GPLv2 or later.
 */
/dts-v1/;
#include "at91sam9g20.dtsi"

/ {
	model = "Acme Systems FoxG20";
	compatible = "acme,foxg20", "atmel,at91sam9g20", "atmel,at91sam9";

	chosen {
		bootargs = "console=ttyS0,115200 root=/dev/mmcblk0p2 rw rootwait";
	};

	memory {
		reg = <0x20000000 0x4000000>;
	};

	clocks {
		#address-cells = <1>;
		#size-cells = <1>;
		ranges;

		main_clock: clock@0 {
			compatible = "atmel,osc", "fixed-clock";
			clock-frequency = <18432000>;
		};
	};

	ahb {
		apb {
			usb1: gadget@fffa4000 {
				atmel,vbus-gpio = <&pioC 6 GPIO_ACTIVE_HIGH>;
				status = "okay";
			};

			mmc0: mmc@fffa8000 {
				pinctrl-0 = <
					&pinctrl_mmc0_clk
					&pinctrl_mmc0_slot1_cmd_dat0
					&pinctrl_mmc0_slot1_dat1_3>;
				status = "okay";

				slot@1 {
					reg = <1>;
					bus-width = <4>;
				};
			};

			usart0: serial@fffb0000 {
				pinctrl-0 =
					<&pinctrl_usart0
					 &pinctrl_usart0_rts
					 &pinctrl_usart0_cts
					>;
				status = "okay";
			};

			usart1: serial@fffb4000 {
				status = "okay";
			};

			usart2: serial@fffb8000 {
				status = "okay";
			};

			macb0: ethernet@fffc4000 {
				phy-mode = "rmii";
				status = "okay";
			};

			usart3: serial@fffd0000 {
				status = "okay";
			};

			uart0: serial@fffd4000 {
				status = "okay";
			};

			uart1: serial@fffd8000 {
				status = "okay";
			};

			dbgu: serial@fffff200 {
				status = "okay";
			};

			pinctrl@fffff400 {
				board {
					pinctrl_pck0_as_mck: pck0_as_mck {
						atmel,pins =
							<AT91_PIOC 1 AT91_PERIPH_B AT91_PINCTRL_NONE>;
					};
				};

				mmc0_slot1 {
					pinctrl_board_mmc0_slot1: mmc0_slot1-board {
						atmel,pins =
							<AT91_PIOC 9 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP_DEGLITCH>;	/* CD pin */
					};
				};

				i2c0 {
					pinctrl_i2c0: i2c0-0 {
						atmel,pins =
							<AT91_PIOA 23 AT91_PERIPH_A AT91_PINCTRL_MULTI_DRIVE	/* TWD (SDA), open drain */
							 AT91_PIOA 24 AT91_PERIPH_A AT91_PINCTRL_MULTI_DRIVE>;	/* TWCK (SCL), open drain */
					};
				};
			};

			watchdog@fffffd40 {
				status = "okay";
			};
		};

		usb0: ohci@00500000 {
			num-ports = <2>;
			status = "okay";
		};
	};

	i2c@0 {
		pinctrl-names = "default";
		pinctrl-0 = <&pinctrl_i2c0>;
		i2c-gpio,delay-us = <5>;	/* ~85 kHz */
		status = "okay";
	};

	leds {
		compatible = "gpio-leds";

		/* red LED marked "PC7" near mini USB (device) receptacle */
		user_led {
			label = "user_led";
			gpios = <&pioC 7 GPIO_ACTIVE_HIGH>;	/* PC7 */
			linux,default-trigger = "heartbeat";
		};
	};

	gpio_keys {
		compatible = "gpio-keys";

		btn {
			label = "Button";
			gpios = <&pioC 4 GPIO_ACTIVE_LOW>;
			linux,code = <0x103>;
			gpio-key,wakeup;
		};
	};
};