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* Microchip PIC32 GPIO devices (PIO).
Required properties:
- compatible: "microchip,pic32mzda-gpio"
- reg: Base address and length for the device.
- interrupts: The port interrupt shared by all pins.
- gpio-controller: Marks the port as GPIO controller.
- #gpio-cells: Two. The first cell is the pin number and
the second cell is used to specify the gpio polarity as defined in
defined in <dt-bindings/gpio/gpio.h>:
0 = GPIO_ACTIVE_HIGH
1 = GPIO_ACTIVE_LOW
2 = GPIO_OPEN_DRAIN
- interrupt-controller: Marks the device node as an interrupt controller.
- #interrupt-cells: Two. The first cell is the GPIO number and second cell
is used to specify the trigger type as defined in
<dt-bindings/interrupt-controller/irq.h>:
IRQ_TYPE_EDGE_RISING
IRQ_TYPE_EDGE_FALLING
IRQ_TYPE_EDGE_BOTH
- clocks: Clock specifier (see clock bindings for details).
- microchip,gpio-bank: Specifies which bank a controller owns.
- gpio-ranges: Interaction with the PINCTRL subsystem.
Example:
/* PORTA */
gpio0: gpio0@1f860000 {
compatible = "microchip,pic32mzda-gpio";
reg = <0x1f860000 0x100>;
interrupts = <118 IRQ_TYPE_LEVEL_HIGH>;
#gpio-cells = <2>;
gpio-controller;
interrupt-controller;
#interrupt-cells = <2>;
clocks = <&rootclk PB4CLK>;
microchip,gpio-bank = <0>;
gpio-ranges = <&pic32_pinctrl 0 0 16>;
};
keys {
...
button@sw1 {
label = "ESC";
linux,code = <1>;
gpios = <&gpio0 12 0>;
};
};
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