gistfile1.txt

/*
 * Copyright (C) 2020 Robert Nelson <[email protected]>
 *
 * 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>

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

			chosen {
				overlays {
					BB-P9_27-LED-00A0 = __TIMESTAMP__;
				};
			};
		};
	};

	/*
	 * Free up the pins used by the cape from the pinmux helpers.
	 */
	fragment@1 {
		target = <&ocp>;
		__overlay__ {
			P9_27_pinmux { status = "disabled"; };	/* P9_27: mcasp0_fsr.gpio3_19 */
			P9_92_pinmux { status = "disabled"; };
		};
	};

	fragment@2 {
		target = <&am33xx_pinmux>;
		__overlay__ {

			bb_gpio_led_pins: pinmux_bb_gpio_led_pins {
				pinctrl-single,pins = <
					BONE_P9_27 (PIN_OUTPUT_PULLDOWN | MUX_MODE7)	/* P9_27: mcasp0_fsr.gpio3_19 */
					AM33XX_IOPAD(0x9a0, PIN_OUTPUT_PULLDOWN | MUX_MODE7) /* (B12) mcasp0_aclkr.gpio3[18] */
				>;
			};
		};
	};

	fragment@3 {
		target-path="/";
		__overlay__ {

			leds {
				pinctrl-names = "default";
				pinctrl-0 = <&bb_gpio_led_pins>;

				compatible = "gpio-leds";

				P9_27 {
					label = "P9_27";
					gpios = <&gpio3 19 GPIO_ACTIVE_HIGH>;
					default-state = "off";
				};

				P114 {
					label = "P114";
					gpios = <&gpio3 18 GPIO_ACTIVE_HIGH>;
					default-state = "off";
				};
			};
		};
	};
};