写一个iic的linux 驱动代码

很高兴为您提供帮助。以下是一个简单的I2C Linux驱动程序示例：

#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/cdev.h>

#define I2C_DEV_NAME "i2c_example"
#define I2C_DEV_CLASS "i2c_example_class"

static int i2c_example_probe(struct i2c_client *client, const struct i2c_device_id *id);
static int i2c_example_remove(struct i2c_client *client);

static struct i2c_device_id i2c_example_id[] = {
{"i2c_example", 0},
{}
};

MODULE_DEVICE_TABLE(i2c, i2c_example_id);

static struct i2c_driver i2c_example_driver = {
.driver = {
.name = I2C_DEV_NAME,
},
.id_table = i2c_example_id,
.probe = i2c_example_probe,
.remove = i2c_example_remove,
};

static int i2c_example_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
// Add your driver code here
return 0;
}

static int i2c_example_remove(struct i2c_client *client)
{
// Add your driver code here
return 0;
}

static int __init i2c_example_init(void)
{
int ret;
struct class *dev_class;

// Register the I2C driver
ret = i2c_add_driver(&i2c_example_driver);
if (ret) {
pr_err("Failed to register i2c driver\n");
goto fail_register_i2c_driver;
}

// Create the device class
dev_class = class_create(THIS_MODULE, I2C_DEV_CLASS);
if (IS_ERR(dev_class)) {
pr_err("Failed to create device class\n");
ret = PTR_ERR(dev_class);
goto fail_create_dev_class;
}

// Create the device node
device_create(dev_class, NULL, MKDEV(0, 0), NULL, I2C_DEV_NAME);

return 0;

fail_create_dev_class:
i2c_del_driver(&i2c_example_driver);
fail_register_i2c_driver:
return ret;
}

static void __exit i2c_example_exit(void)
{
// Remove the device node
device_destroy(class_find_device(&i2c_example_driver.driver.kobj, NULL, NULL, NULL), MKDEV(0, 0));

// Remove the device class
class_destroy(class_find_device(&i2c_example_driver.driver.kobj, NULL, NULL, NULL));

// Remove the I2C driver
i2c_del_driver(&i2c_example_driver);
}

module_init(i2c_example_init);
module_exit(i2c_example_exit);

MODULE_AUTHOR("Your Name");
MODULE_DESCRIPTION("I2C Example Driver");
MODULE_LICENSE("GPL");

当然， 如果您需要更多细节或有其他问题，请告诉我，我很乐意为您提供帮助。