1* Microchip PIC32 GPIO devices (PIO).
2
3Required properties:
4 - compatible: "microchip,pic32mzda-gpio"
5 - reg: Base address and length for the device.
6 - interrupts: The port interrupt shared by all pins.
7 - gpio-controller: Marks the port as GPIO controller.
8 - #gpio-cells: Two. The first cell is the pin number and
9   the second cell is used to specify the gpio polarity as defined in
10   defined in <dt-bindings/gpio/gpio.h>:
11      0 = GPIO_ACTIVE_HIGH
12      1 = GPIO_ACTIVE_LOW
13      2 = GPIO_OPEN_DRAIN
14 - interrupt-controller: Marks the device node as an interrupt controller.
15 - #interrupt-cells: Two. The first cell is the GPIO number and second cell
16   is used to specify the trigger type as defined in
17   <dt-bindings/interrupt-controller/irq.h>:
18      IRQ_TYPE_EDGE_RISING
19      IRQ_TYPE_EDGE_FALLING
20      IRQ_TYPE_EDGE_BOTH
21 - clocks: Clock specifier (see clock bindings for details).
22 - microchip,gpio-bank: Specifies which bank a controller owns.
23 - gpio-ranges: Interaction with the PINCTRL subsystem.
24
25Example:
26
27/* PORTA */
28gpio0: gpio0@1f860000 {
29	compatible = "microchip,pic32mzda-gpio";
30	reg = <0x1f860000 0x100>;
31	interrupts = <118 IRQ_TYPE_LEVEL_HIGH>;
32	#gpio-cells = <2>;
33	gpio-controller;
34	interrupt-controller;
35	#interrupt-cells = <2>;
36	clocks = <&rootclk PB4CLK>;
37	microchip,gpio-bank = <0>;
38	gpio-ranges = <&pic32_pinctrl 0 0 16>;
39};
40
41keys {
42	...
43
44	button@sw1 {
45		label = "ESC";
46		linux,code = <1>;
47		gpios = <&gpio0 12 0>;
48	};
49};
50