/*
 * Copyright (C) 2020 My-Custom-Overlay 
 * Claude Sammut
 *
 */

/dts-v1/;
/plugin/;

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

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

	// identification
	part-number = "My-Custom-Overlay";
	version = "00A0";

	// resources this cape uses
	exclusive-use =
		"P9.18",	// i2c1_sda
		"P9.17",	// i2c1_scl
		"P8.19",	// CAN0 Enable
		"P8.09",		// CAN1 Enable
	
		// hardware ips used
		"i2c1",
		"gpio0_22",
		"gpio2_5";

	/*
	 * Helper to show loaded overlays under: /proc/device-tree/chosen/overlays/
	 */
	fragment@0 {
		target-path="/";
		__overlay__ {

			chosen {
				overlays {
					My-Custom-Overlay-00A0 = __TIMESTAMP__;
				};
			};
			
			aliases {
				rtc0 = &extrtc;
				rtc1 = "/ocp/rtc@44e3e000";
			};
		};
	};

	/*
	 * Free up the pins used by the cape from the pinmux helpers.
	 */
	fragment@1 {
		target = <&ocp>;
		__overlay__ {
			P9_17_pinmux { status = "disabled"; };	/* i2c1_scl */
			P9_18_pinmux { status = "disabled"; };	/* i2c1_sda */
			P8_19_pinmux { status = "disabled"; };
			P8_9_pinmux { status = "disabled"; };
		};
	};

	fragment@2 {
		target = <&am33xx_pinmux>;
		__overlay__ {
			bb_i2c1_pins: pinmux_bb_i2c1_pins {
				pinctrl-single,pins = <
					BONE_P9_18 0x72	/* spi0_d1.i2c1_sda, SLEWCTRL_SLOW | INPUT_PULLUP | MODE2 */
					BONE_P9_17 0x72	/* spi0_cs0.i2c1_scl, SLEWCTRL_SLOW | INPUT_PULLUP | MODE2 */
				>;
			};

			bb_gpio0_22_pins: pinmux_bb_gpio0_22_pins {
				pinctrl-single,pins = <				
					/*0x020 0x07
					BONE_P8_19 (PIN_OUTPUT_PULLUP  | MUX_MODE7)	/* P8_19: gpmc_ad8.gpio0_22 */
					BONE_P8_19 0x07
				>;
			};

			bb_gpio2_5_pins: pinmux_bb_gpio2_5_pins {
				pinctrl-single,pins = <
					/*0x09c 0x07
					BONE_P8_09 (PIN_OUTPUT_PULLDOWN  | MUX_MODE7)	/* P8_19: gpmc_ad8.gpio0_22 */
					BONE_P8_09 0x07
				>; 
			};
		};
	};

	fragment@3 {
		target = <&i2c1>;
		__overlay__ {
			status = "okay";
			pinctrl-names = "default";
			pinctrl-0 = <&bb_i2c1_pins>;

			/* this is the configuration part */
			clock-frequency = <100000>;

			#address-cells = <1>;
			#size-cells = <0>;

			extrtc: ds1672@68 {
				compatible = "dallas,ds1672";
				reg = <0x68>; /* ds1672 has a fixed I2C addr */
			};

			eeprom: eeprom@50 {
				compatible = "atmel,24c256","microchip,24lc256";
				reg = <0x50>;
				pagesize = <64>;
				#address-cells = <1>;
				#size-cells = <1>;
			};
		};
	};

	fragment@4 {
        target = <&ocp>;
        __overlay__ {
            P8_19_pinmux {
                compatible = "bone-pinmux-helper";
                pinctrl-names = "default";
                pinctrl-0 = <&bb_gpio0_22_pins>;
				status = "okay";
            };
        };
    };

	fragment@5 {
        target = <&ocp>;
        __overlay__ {
            P8_09_pinmux {
                compatible = "bone-pinmux-helper";
                pinctrl-names = "default";
                pinctrl-0 = <&bb_gpio2_5_pins>;
				status = "okay";
            };
        };
    };
};