BB-GPIOHELP-00A0.dts

/*
* Copyright (C) 2013 Pantelis Antoniou <panto@antoniou-consulting.com>
*
* 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/;

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

	/* identification */
	part-number = "BB-GPIOHELP";
	version = "00A0";

	/* state the resources this cape uses */
	exclusive-use =
		/* the pin header uses */
		"P9.27",	/* gpio */
		"P9.28",	/* gpio */
		/* the hardware IP uses */
		"gpio3_19", "gpio3_17";

	fragment@0 {
		target = <&am33xx_pinmux>;
		__overlay__ {
			gpio_helper_pins: pinmux_gpio_helper_pins {
				pinctrl-single,pins = <
					0x1a4 0x0f 	/* P9 27 GPIO3_19: mcasp0_fsr.gpio3_19 | MODE7 | OUTPUT */
					0x19c 0x2f	/* P9 28 SPI1_CS0: mcasp0_ahclkr.gpio3_17 | MODE7 | INPUT */
				>;
			};
		};
	};

	fragment@2 {
		target = <&ocp>;
		__overlay__ {

			gpio_helper {
				compatible = "gpio-of-helper";
				status = "okay";
				pinctrl-names = "default";
				pinctrl-0 = <&gpio_helper_pins>;

				/* declare your gpios */
				test_led {
					gpio-name = "test_led";
					gpio = <&gpio4 19 0x00>;	/* gpio4 is gpio3 */
					output;
					init-high;
				};

				test_input {
					gpio-name = "test_input";
					gpio = <&gpio4 17 0x00>;	/* gpio4 is gpio3 */
					input;
					count-rising-edge;
					count-falling-edge;
				};
			};
		};
	};
};