i2c.h File Reference

Inter-Integrated Circuit (I2C) Driver API. More...

#include <linux/i2c.h>
#include <linux/i2c-dev.h>
#include <rtems.h>
#include <rtems/seterr.h>
#include <rtems/thread.h>
#include <sys/ioctl.h>
#include <sys/stat.h>

Go to the source code of this file.

Data Structures
struct	i2c_bus
	I2C bus control. More...
struct	i2c_dev
	I2C slave device control. More...

Macros
#define	I2C_BUS_CLOCK_DEFAULT   100000
	Default I2C bus clock in Hz.
#define	I2C_BUS_NOBLOCK   (1u << 0)
	I2C bus transfer flag to indicate that the task should not block if the bus is busy on a new transfer.
#define	I2C_DEV_IO_CONTROL   0x900
	Base number for device IO control commands.
I2C IO Control Commands
#define	I2C_BUS_OBTAIN   0x800
	Obtains the bus.
#define	I2C_BUS_RELEASE   0x801
	Releases the bus.
#define	I2C_BUS_GET_CONTROL   0x802
	Gets the bus control.
#define	I2C_BUS_SET_CLOCK   0x803
	Sets the bus clock in Hz.

Typedefs
typedef struct i2c_msg	i2c_msg
typedef struct i2c_bus	i2c_bus
typedef struct i2c_dev	i2c_dev
typedef struct i2c_rdwr_ioctl_data	i2c_rdwr_ioctl_data

Functions
int	i2c_bus_init (i2c_bus *bus)
	Initializes a bus control.
i2c_bus *	i2c_bus_alloc_and_init (size_t size)
	Allocates a bus control from the heap and initializes it.
void	i2c_bus_destroy (i2c_bus *bus)
	Destroys a bus control.
void	i2c_bus_destroy_and_free (i2c_bus *bus)
	Destroys a bus control and frees its memory.
int	i2c_bus_register (i2c_bus *bus, const char *bus_path)
	Registers a bus control.
int	i2c_bus_try_obtain (i2c_bus *bus)
	Try to obtain the bus.
void	i2c_bus_obtain (i2c_bus *bus)
	Obtains the bus.
void	i2c_bus_release (i2c_bus *bus)
	Releases the bus.
int	i2c_bus_transfer (i2c_bus *bus, i2c_msg *msgs, uint32_t msg_count)
	Transfers I2C messages.
int	i2c_bus_do_transfer (i2c_bus *bus, i2c_msg *msgs, uint32_t msg_count, uint32_t flags)
	Transfers I2C messages with optional flags.
int	i2c_dev_init (i2c_dev *dev, const char *bus_path, uint16_t address)
	Initializes a device control.
i2c_dev *	i2c_dev_alloc_and_init (size_t size, const char *bus_path, uint16_t address)
	Allocates a device control from the heap and initializes it.
void	i2c_dev_destroy (i2c_dev *dev)
	Destroys a device control.
void	i2c_dev_destroy_and_free (i2c_dev *dev)
	Destroys a device control and frees its memory.
int	i2c_dev_register (i2c_dev *dev, const char *dev_path)
	Registers a device control.

Detailed Description

Inter-Integrated Circuit (I2C) Driver API.