#include "bone/black.h"
#include "gpio.h"

// XXX not compatible with cape-universal!

// Requires a sufficiently recent kernel by rcn (4.9-bone or 4.9-ti).
//
// A udev rule along these lines is recommended:
//
//	SUBSYSTEM=="subsystem", KERNEL=="gpio", ACTION=="add", \
//		RUN+="/bin/mkdir -p /dev/gpio"
//
//	SUBSYSTEM=="gpio", ACTION=="add", TEST=="value", ATTR{label}!="sysfs", \
//		RUN+="/bin/ln -sT '/sys/class/gpio/%k' /dev/gpio/%s{label}"

/ {
	// If you want to use multiple overlays that do gpio configuration, be
	// sure that each uses a different device tree node!
	gpio-demo {
		compatible = "gpio-of-helper";

		// It is usually not *strictly* required to perform pinmux for
		// GPIOs since this is typically their default, but it's good
		// practice to do it anyway since:
		// 1. it makes *sure* the pinmux is right
		// 2. you can configure internal pull-up/down
		// 3. it lets the kernel know the pins are in use
		pinctrl-names = "default";
		pinctrl-0 = <&gpio_demo_pins>;

		// Note that gpio numbers for each pin can be found in the
		// comments in include/bone/black.h

		// custom (new) configuration
		bms_key_on {
			gpio = <&gpio1 17 ACTIVE_HIGH>;  // P9.23
			output;
			init-low;
		};