struct_i2c_driver9
Represent an i2c device driver
Usage
unsigned int
class;
int (*
attach_adapter)
(struct
i2c_adapter
*);
int (*
probe)
(struct
i2c_client
*,
const
struct
i2c_device_id
*);
int (*
remove)
(struct
i2c_client
*);
void (*
shutdown)
(struct
i2c_client
*);
int (*
suspend)
(struct
i2c_client
*,
pm_message_t
mesg);
int (*
resume)
(struct
i2c_client
*);
void (*
alert)
(struct
i2c_client
*,
unsigned
int
data);
struct device_driver
driver;
const struct
i2c_device_id
*
id_table;
int (*
detect)
(struct
i2c_client
*,
struct
i2c_board_info
*);
const unsigned
short
*
address_list;
struct list_head
clients;
Members
class
What kind of i2c device we instantiate (for detect)
attach_adapter
Callback for bus addition (deprecated)
probe
Callback for device binding
remove
Callback for device unbinding
shutdown
Callback for device shutdown
suspend
Callback for device suspend
resume
Callback for device resume
alert
Alert callback, for example for the SMBus alert protocol
command
Callback for bus-wide signaling (optional)
driver
Device driver model driver
id_table
List of I2C devices supported by this driver
detect
Callback for device detection
address_list
The I2C addresses to probe (for detect)
clients
List of detected clients we created (for i2c-core use only)
Overview
The driver.owner field should be set to the module owner of this driver. The driver.name field should be set to the name of this driver.
For automatic device detection, both detect and address_list must be defined. class should also be set, otherwise only devices forced with module parameters will be created. The detect function must fill at least the name field of the i2c_board_info structure it is handed upon successful detection, and possibly also the flags field.
If detect is missing, the driver will still work fine for enumerated devices. Detected devices simply won't be supported. This is expected for the many I2C/SMBus devices which can't be detected reliably, and the ones which can always be enumerated in practice.
The i2c_client structure which is handed to the detect callback is not a real i2c_client. It is initialized just enough so that you can call i2c_smbus_read_byte_data and friends on it. Don't do anything else with it. In particular, calling dev_dbg and friends on it is not allowed.
History
- Debian 8 (Jessie): the text shown here
- Debian 7 (Wheezy)
- Debian 6.0 (Squeeze)