Kernel-4.18.0-80.el8_microchip,pic32-gpio

published: updated: Kernel_4.18.0-80.el8_内核文档
  • 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>;
};

};

oosTech by Sam Lee