/*
 * This is the Device Tree overlay for the IBB Home Automation Cape
 * for BeagleBone, BeagleBone Black and Beaglebone Green.
 *
 * Copyright (c) 2015 - Ingenieurbuero Budde (http://ing-budde.de)
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
/dts-v1/;
/plugin/;

#include <dt-bindings/board/am335x-bbw-bbb-base.h>
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/pinctrl/am33xx.h>

/ {
	compatible = "ti,beaglebone", "ti,beaglebone-black", "ti,beaglebone-green";

	/* identification */
	part-number = "cape-bone-ibb";
	version = "00A0";

	/* state the resources this cape uses */
	exclusive-use =
		/* the pin header uses */
		"P9.24",	/* uart1_txd */
		"P9.26",	/* uart1_rxd */
		"P9.21",	/* uart2_txd */
		"P9.22",	/* uart2_rxd */
		"P9.13",	/* uart4_txd */
		"P9.11",	/* uart4_rxd */
		"P9.15",	/* rtc-int */

		/* the hardware ip uses */
		"uart1",
		"uart2",
		"uart4",
		"gpio1_16";

	fragment@0 {
		target = <&am33xx_pinmux>;
		__overlay__ {
			bb_uart1_pins: pinmux_bb_uart1_pins {
				pinctrl-single,pins = <
					BONE_P9_24 (PIN_OUTPUT_PULLDOWN | MUX_MODE0) /* uart1_txd.uart1_txd */
					BONE_P9_26 (PIN_INPUT_PULLUP | MUX_MODE0) /* uart1_rxd.uart1_rxd */
				>;
			};
			bb_uart2_pins: pinmux_bb_uart2_pins {
				pinctrl-single,pins = <
					BONE_P9_21 (PIN_OUTPUT_PULLDOWN | MUX_MODE1) /* spi0_d0.uart2_txd */
					BONE_P9_22 (PIN_INPUT_PULLUP | MUX_MODE1) /* spi0_sclk.uart2_rxd */
				>;
			};
			bb_uart4_pins: pinmux_bb_uart4_pins {
				pinctrl-single,pins = <
					BONE_P9_11 (PIN_INPUT_PULLUP | MUX_MODE6) /* gpmc_wait0.uart4_rxd_mux2 */
					BONE_P9_13 (PIN_OUTPUT_PULLDOWN | MUX_MODE6) /* gpmc_wpn.uart4_txd_mux2 */
				>;
			};
			bb_gpio1_16_pins: pinmux_bb_gpio1_16_pins {
				pinctrl-single,pins = <
					BONE_P9_15 (PIN_INPUT | MUX_MODE7) /* gpmc_a0.gpio1_16 */
				>;
			};
		};
	};

	fragment@1 {
		target = <&uart1>;
		__overlay__ {
			status = "okay";
			pinctrl-names = "default";
			pinctrl-0 = <&bb_uart1_pins>;
		};
	};

	fragment@2 {
		target = <&uart2>;
		__overlay__ {
			status = "okay";
			pinctrl-names = "default";
			pinctrl-0 = <&bb_uart2_pins>;
		};
	};

	fragment@3 {
		target = <&uart4>;
		__overlay__ {
			status = "okay";
			pinctrl-names = "default";
			pinctrl-0 = <&bb_uart4_pins>;
		};
	};

	fragment@4 {
		target = <&i2c2>;
		__overlay__ {
			/* overwrite clock freq */
			clock-frequency = <400000>;

			/* shut up DTC warnings */
			#address-cells = <1>;
			#size-cells = <0>;

			/* RTC */
			rtc@68 {
				compatible = "maxim,ds3231";
				reg = <0x68>;
			};

			/* PCA9546 I2C multiplexer */
			i2cmux@70 {
				compatible = "nxp,pca9546";
				#address-cells = <1>;
				#size-cells = <0>;
				reg = <0x70>;

				im0: bus@0 {
					compatible = "nxp,pca954x-bus";
					reg = <0>;
				};
				im1: bus@1 {
					compatible = "nxp,pca954x-bus";
					reg = <1>;
				};
				im2: bus@2 {
					compatible = "nxp,pca954x-bus";
					reg = <2>;
				};
				im3: bus@3 {
					compatible = "nxp,pca954x-bus";
					reg = <3>;
				};
			};
		};
	};

	fragment@5 {
		target-path="/";
		__overlay__ {
			gpio_keys {
				compatible = "gpio-keys";
				pinctrl-names = "default";
				pinctrl-0 = <&bb_gpio1_16_pins>;

				/* avoid stupid warning */
				#address-cells = <1>;
				#size-cells = <0>;

				rtc_mfp@1 {
					label = "rtc_mfp";
					gpios = <&gpio1 16 GPIO_ACTIVE_HIGH>;
					linux,code = <143>; /* System Wake Up */
					gpio-key,wakeup;
				};
			};

			aliases {
				i2c3 = &im0;
				i2c4 = &im1;
				i2c5 = &im2;
				i2c6 = &im3;
			};
		};
	};
};