1* Oxford Semiconductor OXNAS SoC GPIO Controller
2
3Please refer to gpio.txt for generic information regarding GPIO bindings.
4
5Required properties:
6 - compatible: "oxsemi,ox810se-gpio" or "oxsemi,ox820-gpio"
7 - reg: Base address and length for the device.
8 - interrupts: The port interrupt shared by all pins.
9 - gpio-controller: Marks the port as GPIO controller.
10 - #gpio-cells: Two. The first cell is the pin number and
11   the second cell is used to specify the gpio polarity as defined in
12   defined in <dt-bindings/gpio/gpio.h>:
13      0 = GPIO_ACTIVE_HIGH
14      1 = GPIO_ACTIVE_LOW
15 - interrupt-controller: Marks the device node as an interrupt controller.
16 - #interrupt-cells: Two. The first cell is the GPIO number and second cell
17   is used to specify the trigger type as defined in
18   <dt-bindings/interrupt-controller/irq.h>:
19      IRQ_TYPE_EDGE_RISING
20      IRQ_TYPE_EDGE_FALLING
21      IRQ_TYPE_EDGE_BOTH
22 - gpio-ranges: Interaction with the PINCTRL subsystem, it also specifies the
23   gpio base and count, should be in the format of numeric-gpio-range as
24   specified in the gpio.txt file.
25
26Example:
27
28gpio0: gpio@0 {
29	compatible = "oxsemi,ox810se-gpio";
30	reg = <0x000000 0x100000>;
31	interrupts = <21>;
32	#gpio-cells = <2>;
33	gpio-controller;
34	interrupt-controller;
35	#interrupt-cells = <2>;
36	gpio-ranges = <&pinctrl 0 0 32>;
37};
38
39keys {
40	...
41
42	button-esc {
43		label = "ESC";
44		linux,code = <1>;
45		gpios = <&gpio0 12 0>;
46	};
47};
48