Kernel-4.18.0-80.el8_oxnas,pinctrl

• Oxford Semiconductor OXNAS SoC Family 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.

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

Required properties for pin controller node:

• compatible: “oxsemi,ox810se-pinctrl” or “oxsemi,ox820-pinctrl”
• oxsemi,sys-ctrl: a phandle to the system controller syscon node

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.

Example:

pinctrl: pinctrl {
compatible = “oxsemi,ox810se-pinctrl”;

/* Regmap for sys registers */
oxsemi,sys-ctrl = <&sys>;

pinctrl_uart2: pinctrl_uart2 {
    uart2a {
        pins = "gpio31";
        function = "fct3";
    };
    uart2b {
        pins = "gpio32";
        function = "fct3";
    };
};

};

uart2: serial@900000 {
compatible = “ns16550a”;
reg = <0x900000 0x100000>;
clocks = <&sysclk>;
interrupts = <29>;
reg-shift = <0>;
fifo-size = <16>;
reg-io-width = <1>;
current-speed = <115200>;
no-loopback-test;
resets = <&reset 22>;
pinctrl-names = “default”;
pinctrl-0 = <&pinctrl_uart2>;
};