Kernel-4.18.0-80.el8_microchip,pic32-pinctrl

• Microchip PIC32 Pin Controller

Please refer to pinctrl-bindings.txt, ../gpio/gpio.txt, and
../interrupt-controller/interrupts.txt for generic information regarding
pin controller, GPIO, and interrupt bindings.

PIC32 ‘pin configuration node’ is a node of a group of pins which can be
used for a specific device or function. This node represents configuraions of
pins, optional function, and optional mux related configuration.

Required properties for pin controller node:

• compatible: “microchip,pic32mada-pinctrl”
• reg: Address range of the pinctrl registers.
• clocks: Clock specifier (see clock bindings for details)

Required properties for pin configuration sub-nodes:

• pins: List of pins to which the configuration applies.

Optional properties for pin configuration sub-nodes:

• function: Mux function for the specified pins.
• bias-pull-up: Enable weak pull-up.
• bias-pull-down: Enable weak pull-down.
• input-enable: Set the pin as an input.
• output-low: Set the pin as an output level low.
• output-high: Set the pin as an output level high.
• microchip,digital: Enable digital I/O.
• microchip,analog: Enable analog I/O.

Example:

pic32_pinctrl: pinctrl@1f801400{
#address-cells = <1>;
#size-cells = <1>;
compatible = “microchip,pic32mzda-pinctrl”;
reg = <0x1f801400 0x400>;
clocks = <&rootclk PB1CLK>;

pinctrl_uart2: pinctrl_uart2 {
    uart2-tx {
        pins = "G9";
        function = "U2TX";
        microchip,digital;
        output-low;
    };
    uart2-rx {
        pins = "B0";
        function = "U2RX";
        microchip,digital;
        input-enable;
    };
};

};

uart2: serial@1f822200 {
compatible = “microchip,pic32mzda-uart”;
reg = <0x1f822200 0x50>;
pinctrl-names = “default”;
pinctrl-0 = <&pinctrl_uart2>;
};