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| -rw-r--r-- | Documentation/devicetree/bindings/gpio/microchip,pic32-gpio.txt | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpio/microchip,pic32-gpio.txt b/Documentation/devicetree/bindings/gpio/microchip,pic32-gpio.txt new file mode 100644 index 000000000..dd031fc93 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/microchip,pic32-gpio.txt @@ -0,0 +1,49 @@ +* 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>; + }; +}; |