Brooklyn/arch/arm/boot/dts/overlays/i2c-rtc-gpio-overlay.dts

// Definitions for several I2C based Real Time Clocks
// Available through i2c-gpio
/dts-v1/;
/plugin/;

#include <dt-bindings/gpio/gpio.h>

/ {
	compatible = "brcm,bcm2835";

	fragment@0 {
		target-path = "/";
		__overlay__ {
			i2c_gpio: i2c-gpio-rtc@0 {
				compatible = "i2c-gpio";
				gpios = <&gpio 23 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN) /* sda */
					 &gpio 24 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN) /* scl */
					>;
				i2c-gpio,delay-us = <2>;        /* ~100 kHz */
				#address-cells = <1>;
				#size-cells = <0>;
			};
		};
	};

	fragment@1 {
		target = <&i2c_gpio>;
		__dormant__ {
			#address-cells = <1>;
			#size-cells = <0>;
			status = "okay";

			abx80x: abx80x@69 {
				compatible = "abracon,abx80x";
				reg = <0x69>;
				abracon,tc-diode = "standard";
				abracon,tc-resistor = <0>;
				status = "okay";
			};
		};
	};

	fragment@2 {
		target = <&i2c_gpio>;
		__dormant__ {
			#address-cells = <1>;
			#size-cells = <0>;
			status = "okay";

			ds1307: ds1307@68 {
				compatible = "dallas,ds1307";
				reg = <0x68>;
				status = "okay";
			};
		};
	};

	fragment@3 {
		target = <&i2c_gpio>;
		__dormant__ {
			#address-cells = <1>;
			#size-cells = <0>;
			status = "okay";

			ds1339: ds1339@68 {
				compatible = "dallas,ds1339";
				trickle-resistor-ohms = <0>;
				reg = <0x68>;
				status = "okay";
			};
		};
	};

	fragment@4 {
		target = <&i2c_gpio>;
		__dormant__ {
			#address-cells = <1>;
			#size-cells = <0>;
			status = "okay";

			ds3231: ds3231@68 {
				compatible = "maxim,ds3231";
				reg = <0x68>;
				status = "okay";
			};
		};
	};

	fragment@5 {
		target = <&i2c_gpio>;
		__dormant__ {
			#address-cells = <1>;
			#size-cells = <0>;
			status = "okay";

			mcp7940x: mcp7940x@6f {
				compatible = "microchip,mcp7940x";
				reg = <0x6f>;
				status = "okay";
			};
		};
	};

	fragment@6 {
		target = <&i2c_gpio>;
		__dormant__ {
			#address-cells = <1>;
			#size-cells = <0>;
			status = "okay";

			mcp7941x: mcp7941x@6f {
				compatible = "microchip,mcp7941x";
				reg = <0x6f>;
				status = "okay";
			};
		};
	};

	fragment@7 {
		target = <&i2c_gpio>;
		__dormant__ {
			#address-cells = <1>;
			#size-cells = <0>;
			status = "okay";

			pcf2127@51 {
				compatible = "nxp,pcf2127";
				reg = <0x51>;
				status = "okay";
			};
		};
	};

	fragment@8 {
		target = <&i2c_gpio>;
		__dormant__ {
			#address-cells = <1>;
			#size-cells = <0>;
			status = "okay";

			pcf8523: pcf8523@68 {
				compatible = "nxp,pcf8523";
				reg = <0x68>;
				status = "okay";
			};
		};
	};

	fragment@9 {
		target = <&i2c_gpio>;
		__dormant__ {
			#address-cells = <1>;
			#size-cells = <0>;
			status = "okay";

			pcf8563: pcf8563@51 {
				compatible = "nxp,pcf8563";
				reg = <0x51>;
				status = "okay";
			};
		};
	};

	fragment@10 {
		target = <&i2c_arm>;
		__dormant__ {
			#address-cells = <1>;
			#size-cells = <0>;
			status = "okay";

			m41t62: m41t62@68 {
				compatible = "st,m41t62";
				reg = <0x68>;
				status = "okay";
			};
		};
	};

	fragment@11 {
		target = <&i2c_gpio>;
		__dormant__ {
			#address-cells = <1>;
			#size-cells = <0>;
			status = "okay";

			rv3028: rv3028@52 {
				compatible = "microcrystal,rv3028";
				reg = <0x52>;
				status = "okay";
			};
		};
	};

	fragment@12 {
		target = <&i2c_gpio>;
		__dormant__ {
			#address-cells = <1>;
			#size-cells = <0>;
			status = "okay";

			pcf2129@51 {
				compatible = "nxp,pcf2129";
				reg = <0x51>;
				status = "okay";
			};
		};
	};

	fragment@13 {
		target = <&i2c_gpio>;
		__dormant__ {
			#address-cells = <1>;
			#size-cells = <0>;
			status = "okay";

			rv1805: rv1805@69 {
				compatible = "microcrystal,rv1805";
				reg = <0x69>;
				abracon,tc-diode = "standard";
				abracon,tc-resistor = <0>;
				status = "okay";
			};
		};
	};

	__overrides__ {
		abx80x = <0>,"+1";
		ds1307 = <0>,"+2";
		ds1339 = <0>,"+3";
		ds3231 = <0>,"+4";
		mcp7940x = <0>,"+5";
		mcp7941x = <0>,"+6";
		pcf2127 = <0>,"+7";
		pcf8523 = <0>,"+8";
		pcf8563 = <0>,"+9";
		m41t62 = <0>,"+10";
		rv3028 = <0>,"+11";
		pcf2129 = <0>,"+12";
		rv1805 = <0>,"+13";

		addr = <&abx80x>, "reg:0",
		       <&ds1307>, "reg:0",
		       <&ds1339>, "reg:0",
		       <&ds3231>, "reg:0",
		       <&mcp7940x>, "reg:0",
		       <&mcp7941x>, "reg:0",
		       <&pcf8523>, "reg:0",
		       <&pcf8563>, "reg:0",
		       <&m41t62>, "reg:0",
		       <&rv1805>, "reg:0";
		trickle-diode-type = <&abx80x>,"abracon,tc-diode",
				     <&rv1805>,"abracon,tc-diode";
		trickle-resistor-ohms = <&ds1339>,"trickle-resistor-ohms:0",
					<&abx80x>,"abracon,tc-resistor:0",
					<&rv3028>,"trickle-resistor-ohms:0",
					<&rv1805>,"abracon,tc-resistor:0";
		backup-switchover-mode = <&rv3028>,"backup-switchover-mode:0";
		wakeup-source = <&ds1339>,"wakeup-source?",
				<&ds3231>,"wakeup-source?",
				<&mcp7940x>,"wakeup-source?",
				<&mcp7941x>,"wakeup-source?";
		i2c_gpio_sda = <&i2c_gpio>,"gpios:4";
		i2c_gpio_scl = <&i2c_gpio>,"gpios:16";
		i2c_gpio_delay_us = <&i2c_gpio>,"i2c-gpio,delay-us:0";
	};
};