ti,cc32xx-pinctrl

Description

The TI CC32XX pin controller is a singleton node responsible for controlling
pin function selection and pin properties. For example, you can
use this node to route UART0 RX to pin 55 and enable the pull-up resistor
on the pin.

The node has the 'pinctrl' node label set in your SoC's devicetree,
so you can modify it like this:

  &pinctrl {
          /* your modifications go here */
  };

All device pin configurations should be placed in child nodes of the
'pinctrl' node, as shown in this example:

  /* You can put this in places like a board-pinctrl.dtsi file in
   * your board directory, or a devicetree overlay in your application.
   */

  /* include pre-defined combinations for the SoC variant used by the board */
  #include <dt-bindings/pinctrl/gd32f450i(g-i-k)xx-pinctrl.h>

  &pinctrl {
    /* configuration for the uart0 "default" state */
    uart0_default: uart0_default {
      /* group 1 */
      group1 {
        /* configure pin 55 as UART0 TX and pin 61 as UART0 CTS */
        pinmux = <UART0_TX_P55>, <UART0_CTS_P61>;
      };
      /* group 2 */
      group2 {
        /* configure pin 57 as UART0 RX and pin 62 as UART0 RTS  */
        pinmux = <UART0_RX_P57>, <UART0_RTS_P62>;
        /* both pin 57 and 62 have pull-up enabled */
        bias-pull-up;
      };
    };

The 'uart0_default' child node encodes the pin configurations for a
particular state of a device; in this case, the default (that is, active)
state.

As shown, pin configurations are organized in groups within each child node.
Each group can specify a list of pin function selections in the 'pinmux'
property.

A group can also specify shared pin properties common to all the specified
pins, such as the 'bias-pull-up' property in group 2. Here is a list of
supported standard pin properties:

- drive-push-pull: Push-pull drive mode (default, not required).
- drive-open-drain: Open-drain drive mode.
- bias-disable: Disable pull-up/down (default, not required).
- bias-pull-up: Enable pull-up resistor.
- bias-pull-down: Enable pull-down resistor.
- drive-strength: Configure drive strength in mA (defaults to 6mA, IC default).

Note that drive and bias options are mutually exclusive.

To link pin configurations with a device, use a pinctrl-N property for some
number N, like this example you could place in your board's DTS file:

   #include "board-pinctrl.dtsi"

   &uart0 {
         pinctrl-0 = <&uart0_default>
         pinctrl-names = "default";
   };

Properties

Top level properties

These property descriptions apply to “ti,cc32xx-pinctrl” nodes themselves. This page also describes child node properties in the following sections.

Properties not inherited from the base binding file.

(None)

Properties inherited from the base binding file, which defines common properties that may be set on many nodes. Not all of these may apply to the “ti,cc32xx-pinctrl” compatible.

Name	Type	Details
`status`	`string`	indicates the operational status of a device Legal values: `'ok'`, `'okay'`, `'disabled'`, `'reserved'`, `'fail'`, `'fail-sss'` See Important properties for more information.
`compatible`	`string-array`	compatible strings This property is required. See Important properties for more information.
`reg`	`array`	register space See Important properties for more information.
`reg-names`	`string-array`	name of each register space
`interrupts`	`array`	interrupts for device See Important properties for more information.
`interrupts-extended`	`compound`	extended interrupt specifier for device
`interrupt-names`	`string-array`	name of each interrupt
`interrupt-parent`	`phandle`	phandle to interrupt controller node
`label`	`string`	Human readable string describing the device (used as device_get_binding() argument) See Important properties for more information. This property is deprecated.
`clocks`	`phandle-array`	Clock gate information
`clock-names`	`string-array`	name of each clock
`#address-cells`	`int`	number of address cells in reg property
`#size-cells`	`int`	number of size cells in reg property
`dmas`	`phandle-array`	DMA channels specifiers
`dma-names`	`string-array`	Provided names of DMA channel specifiers
`io-channels`	`phandle-array`	IO channels specifiers
`io-channel-names`	`string-array`	Provided names of IO channel specifiers
`mboxes`	`phandle-array`	mailbox / IPM channels specifiers
`mbox-names`	`string-array`	Provided names of mailbox / IPM channel specifiers
`wakeup-source`	`boolean`	Property to identify that a device can be used as wake up source. When this property is provided a specific flag is set into the device that tells the system that the device is capable of wake up the system. Wake up capable devices are disabled (interruptions will not wake up the system) by default but they can be enabled at runtime if necessary.
`power-domain`	`phandle`	Power domain the device belongs to. The device will be notified when the power domain it belongs to is either suspended or resumed.
`zephyr,pm-device-runtime-auto`	`boolean`	Automatically configure the device for runtime power management after the init function runs.

Grandchild node properties

Name	Type	Details
`pinmux`	`array`	An array of pins sharing the same group properties. The pins should be defined using pre-defined macros or, alternatively, using the TI_CC32XX_PINMUX helper macro. This property is required.
`drive-strength`	`int`	maximum sink or source current in mA Default value: `6` Legal values: `0`, `2`, `4`, `6`, `8`, `10`, `12`, `14`
`bias-disable`	`boolean`	disable any pin bias
`bias-pull-up`	`boolean`	enable pull-up resistor
`bias-pull-down`	`boolean`	enable pull-down resistor
`drive-push-pull`	`boolean`	drive actively high and low
`drive-open-drain`	`boolean`	drive with open drain (hardware AND)