projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| ad2db351 JH |
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>; | |
| 82cc37f6 | 37 | clocks = <&rootclk PB1CLK>; |
| ad2db351 JH |
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 | }; |