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 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 };