I3C Address-related Helper Code

I3C Address-related Helper Code. More...

Data Structures
struct	i3c_addr_slots
	Structure to keep track of addresses on I3C bus. More...

Macros
#define	I3C_BROADCAST_ADDR   0x7E
	Broadcast Address on I3C bus.
#define	I3C_MAX_ADDR   0x7F
	Maximum value of device addresses.

Enumerations
enum	i3c_addr_slot_status {   I3C_ADDR_SLOT_STATUS_FREE = 0U , I3C_ADDR_SLOT_STATUS_RSVD , I3C_ADDR_SLOT_STATUS_I3C_DEV , I3C_ADDR_SLOT_STATUS_I2C_DEV ,   I3C_ADDR_SLOT_STATUS_MASK = 0x03U }
	Enum to indicate whether an address is reserved, has I2C/I3C device attached, or no device attached. More...

Functions
int	i3c_addr_slots_init (const struct device *dev)
	Initialize the I3C address slots struct.
void	i3c_addr_slots_set (struct i3c_addr_slots *slots, uint8_t dev_addr, enum i3c_addr_slot_status status)
	Set the address status of a device.
enum i3c_addr_slot_status	i3c_addr_slots_status (struct i3c_addr_slots *slots, uint8_t dev_addr)
	Get the address status of a device.
bool	i3c_addr_slots_is_free (struct i3c_addr_slots *slots, uint8_t dev_addr)
	Check if the address is free.
uint8_t	i3c_addr_slots_next_free_find (struct i3c_addr_slots *slots, uint8_t start_addr)
	Find the next free address.
static void	i3c_addr_slots_mark_free (struct i3c_addr_slots *addr_slots, uint8_t addr)
	Mark the address as free (not used) in device list.
static void	i3c_addr_slots_mark_rsvd (struct i3c_addr_slots *addr_slots, uint8_t addr)
	Mark the address as reserved in device list.
static void	i3c_addr_slots_mark_i3c (struct i3c_addr_slots *addr_slots, uint8_t addr)
	Mark the address as I3C device in device list.
static void	i3c_addr_slots_mark_i2c (struct i3c_addr_slots *addr_slots, uint8_t addr)
	Mark the address as I2C device in device list.

Detailed Description

I3C Address-related Helper Code.

Macro Definition Documentation

I3C_BROADCAST_ADDR

#define I3C_BROADCAST_ADDR   0x7E

#include <zephyr/drivers/i3c/addresses.h>

Broadcast Address on I3C bus.

I3C_MAX_ADDR

#define I3C_MAX_ADDR   0x7F

#include <zephyr/drivers/i3c/addresses.h>

Maximum value of device addresses.

Enumeration Type Documentation

i3c_addr_slot_status

enum i3c_addr_slot_status

#include <zephyr/drivers/i3c/addresses.h>

Enum to indicate whether an address is reserved, has I2C/I3C device attached, or no device attached.

Enumerator
I3C_ADDR_SLOT_STATUS_FREE	Address has not device attached.
I3C_ADDR_SLOT_STATUS_RSVD	Address is reserved.
I3C_ADDR_SLOT_STATUS_I3C_DEV	Address is associated with an I3C device.
I3C_ADDR_SLOT_STATUS_I2C_DEV	Address is associated with an I2C device.
I3C_ADDR_SLOT_STATUS_MASK	Bit masks used to filter status bits.

Function Documentation

i3c_addr_slots_init()

int i3c_addr_slots_init

(

const struct device *

dev

)

#include <zephyr/drivers/i3c/addresses.h>

Initialize the I3C address slots struct.

This clears out the assigned address bits, and set the reserved address bits according to the I3C specification.

Parameters

dev	Pointer to controller device driver instance.

Return values

0	if successful.
-EINVAL	if duplicate addresses.

i3c_addr_slots_is_free()

bool i3c_addr_slots_is_free	(	struct i3c_addr_slots *	slots,
		uint8_t	dev_addr
	)

#include <zephyr/drivers/i3c/addresses.h>

Check if the address is free.

Parameters

slots	Pointer to the address slots structure.
dev_addr	Device address.

Return values

true	if address is free.
false	if address is not free.

i3c_addr_slots_mark_free()

static void i3c_addr_slots_mark_free ( struct i3c_addr_slots *  addr_slots, uint8_t  addr  )

inlinestatic

#include <zephyr/drivers/i3c/addresses.h>

Mark the address as free (not used) in device list.

Parameters

addr_slots	Pointer to the address slots struct.
addr	Device address.

i3c_addr_slots_mark_i2c()

static void i3c_addr_slots_mark_i2c ( struct i3c_addr_slots *  addr_slots, uint8_t  addr  )

inlinestatic

#include <zephyr/drivers/i3c/addresses.h>

Mark the address as I2C device in device list.

Parameters

addr_slots	Pointer to the address slots struct.
addr	Device address.

i3c_addr_slots_mark_i3c()

static void i3c_addr_slots_mark_i3c ( struct i3c_addr_slots *  addr_slots, uint8_t  addr  )

inlinestatic

#include <zephyr/drivers/i3c/addresses.h>

Mark the address as I3C device in device list.

Parameters

addr_slots	Pointer to the address slots struct.
addr	Device address.

i3c_addr_slots_mark_rsvd()

static void i3c_addr_slots_mark_rsvd ( struct i3c_addr_slots *  addr_slots, uint8_t  addr  )

inlinestatic

#include <zephyr/drivers/i3c/addresses.h>

Mark the address as reserved in device list.

Parameters

addr_slots	Pointer to the address slots struct.
addr	Device address.

i3c_addr_slots_next_free_find()

uint8_t i3c_addr_slots_next_free_find	(	struct i3c_addr_slots *	slots,
		uint8_t	start_addr
	)

#include <zephyr/drivers/i3c/addresses.h>

Find the next free address.

This can be used to find the next free address that can be assigned to a new device.

Parameters

slots	Pointer to the address slots structure.
start_addr	Where to start searching

Returns

The next free address, or 0 if none found.

i3c_addr_slots_set()

void i3c_addr_slots_set	(	struct i3c_addr_slots *	slots,
		uint8_t	dev_addr,
		enum i3c_addr_slot_status	status
	)

#include <zephyr/drivers/i3c/addresses.h>

Set the address status of a device.

Parameters

slots	Pointer to the address slots structure.
dev_addr	Device address.
status	New status for the address dev_addr.

i3c_addr_slots_status()

enum i3c_addr_slot_status i3c_addr_slots_status	(	struct i3c_addr_slots *	slots,
		uint8_t	dev_addr
	)

#include <zephyr/drivers/i3c/addresses.h>

Get the address status of a device.

Parameters

slots	Pointer to the address slots structure.
dev_addr	Device address.

Returns

Address status for the address dev_addr.