Interfaces for device multiplexers. More...

Files
file	devmux.h
	Public APIs for the Device Multiplexer driver.

Functions
int	devmux_select_get (const struct device *dev)
	Get the current selection of a devmux device.
int	devmux_select_set (struct device *dev, size_t index)
	Set the selection of a devmux device.

Detailed Description

Interfaces for device multiplexers.

Devmux operates as a device multiplexer, forwarding the characteristics of the selected device.

           +----------+                            +----------+
           |  devmux  |                            |  devmux  |
           |          |                            |          |
dev0       |          |                 dev0       |          |
+---------->   \      |                 +---------->          |
           |    \     |                            |          |
dev1       |     \    |       dev0      dev1       |          |       dev2
+---------->      O   +---------->      +---------->      O   +---------->
           |          |                            |     /    |
dev2       |          |                 dev2       |    /     |
+---------->          |                 +---------->   /      |
           |          |                            |          |
           |          |                            |          |
           |          |                            |          |
           +-----^----+                            +-----^----+
                 |                                       |
  select == 0    |                       select == 2     |
  +--------------+                       +---------------+

Function Documentation

◆ devmux_select_get()

int devmux_select_get ( const struct device * dev )

#include <zephyr/drivers/misc/devmux/devmux.h>

Get the current selection of a devmux device.

Return the index of the currently selected device.

Parameters

dev	the devmux device

Returns: The index (>= 0) of the currently active multiplexed device on success

Return values

-EINVAL If dev is invalid

◆ devmux_select_set()

int devmux_select_set	(	struct device *	dev,
		size_t	index )

#include <zephyr/drivers/misc/devmux/devmux.h>

Set the selection of a devmux device.

Select the device at index.