1 * Microchip PIC32 Pin Controller
2
3 Please refer to pinctrl-bindings.txt, ../gpio/gpio.txt, and
4 ../interrupt-controller/interrupts.txt for generic information regarding
5 pin controller, GPIO, and interrupt bindings.
6
7 PIC32 'pin configuration node' is a node of a group of pins which can be
8 used for a specific device or function. This node represents configurations of
9 pins, optional function, and optional mux related configuration.
10
11 Required properties for pin controller node:
12 - compatible: "microchip,pic32mada-pinctrl"
13 - reg: Address range of the pinctrl registers.
14 - clocks: Clock specifier (see clock bindings for details)
15
16 Required properties for pin configuration sub-nodes:
17 - pins: List of pins to which the configuration applies.
18
19 Optional properties for pin configuration sub-nodes:
20 ----------------------------------------------------
21 - function: Mux function for the specified pins.
22 - bias-pull-up: Enable weak pull-up.
23 - bias-pull-down: Enable weak pull-down.
24 - input-enable: Set the pin as an input.
25 - output-low: Set the pin as an output level low.
26 - output-high: Set the pin as an output level high.
27 - microchip,digital: Enable digital I/O.
28 - microchip,analog: Enable analog I/O.
29
30 Example:
31
32 pic32_pinctrl: pinctrl@1f801400{
33 #address-cells = <1>;
34 #size-cells = <1>;
35 compatible = "microchip,pic32mzda-pinctrl";
36 reg = <0x1f801400 0x400>;
37 clocks = <&rootclk PB1CLK>;
38
39 pinctrl_uart2: pinctrl_uart2 {
40 uart2-tx {
41 pins = "G9";
42 function = "U2TX";
43 microchip,digital;
44 output-low;
45 };
46 uart2-rx {
47 pins = "B0";
48 function = "U2RX";
49 microchip,digital;
50 input-enable;
51 };
52 };
53 };
54
55 uart2: serial@1f822200 {
56 compatible = "microchip,pic32mzda-uart";
57 reg = <0x1f822200 0x50>;
58 pinctrl-names = "default";
59 pinctrl-0 = <&pinctrl_uart2>;
60 };
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