Merge tag 'nios2-v4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/lftan...
[cascardo/linux.git] / Documentation / devicetree / bindings / pinctrl / microchip,pic32-pinctrl.txt
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 configuraions 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 };