1 * Microchip PIC32 GPIO devices (PIO).
2
3 Required 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
25 Example:
26
27 /* PORTA */
28 gpio0: 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
41 keys {
42 ...
43
44 button@sw1 {
45 label = "ESC";
46 linux,code = <1>;
47 gpios = <&gpio0 12 0>;
48 };
49 };
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