I2C Driver for Add-In Device - Probe not being Called

[pauldemet]

I am writing a driver for an external I2C bus device that resides on a custom computer board. There is an external connector on the device that provides an I2C bus interface. Obviously the Linux O/S does not know what device is on the bus so the driver needs to add its device to an existing bus. I have coded the following driver but the probe function is never called. What invokes the probe method to be called?

Code:
#ifndef __KERNEL__
# define __KERNEL__
#endif

#ifndef MODULE
# define MODULE
#endif

#include <linux/module.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/kernel.h>
#include "io60_com4_cfg.h"

// Function prototypes for local functions

// I2C Device Info
struct i2c_board_info io60_com4_cfg_info[] = {
{
I2C_BOARD_INFO("max7310", 0x30)
},
{
I2C_BOARD_INFO("max7310", 0x32)
},
{
I2C_BOARD_INFO("max7310", 0x34)
},
};

struct i2c_device_id io60_com4_cfg_id[] = {
{ "max7310", 0x30 },
{ "max7310", 0x32 },
{ "max7310", 0x34 },
{}
};
MODULE_DEVICE_TABLE(i2c, io60_com4_cfg_id);

// Probe Module
nt io60_com4_cfg_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
struct i2c_adapter *bus;

printk("<1>io60_com4_cfg: probed\n");

// Populate bus
bus = i2c_get_adapter(2);
if (!bus) {
printk("<1>io60_com4_cfg: invalid i2c adapter\n");
return -ENODEV;
}

memset(&io60_com4_cfg_info, 0, sizeof(struct i2c_board_info));
client = i2c_new_device(bus, io60_com4_cfg_info);
if (!client) {
printk("<1>io60_com4_cfg: unable to add i2c device\n");
return -ENODEV;
}

return SUCCESS;
}

// Remove Module
nt io60_com4_cfg_remove(struct i2c_client *client)
{
printk("<1>io60_com4_cfg: removed\n");
i2c_unregister_device(client);
}

// Driver Declarations
struct i2c_driver io60_com4_cfg_driver = {
.driver = {
.name = "io60_com4_cfg",
},
.probe = io60_com4_cfg_probe,
.remove = io60_com4_cfg_remove,
.id_table = io60_com4_cfg_id,
};

// Init Module
static int __init io60_com4_cfg_init(void)
{
// register the i2c chip driver
printk("<1>io60_com4_cfg: init executed\n");
return i2c_add_driver(&io60_com4_cfg_driver);
}

// Cleanup Module
static void __exit io60_com4_cfg_exit(void)
{
printk("<1>io60_com4_cfg: exit executed\n");
i2c_del_driver(&io60_com4_cfg_driver);
}

module_init(io60_com4_cfg_init);
module_exit(io60_com4_cfg_exit);
I attempted to move the get_adapter and add_new_device code pieces to the init function, but then the O/S will return a message that the driver does not exist.

Any ideas would be appreciated.

Continue reading...