#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/err.h>
#include <linux/regmap.h>
#include <linux/slab.h>static const unsigned short addr_list[] = { 0x50,0x68, I2C_CLIENT_END };
static struct i2c_board_info mpu6050_info = {.type = "mpu6050",
};
static struct i2c_client *mpu6050_client;static int mpu6050dev_init ( void )
{struct i2c_adapter *i2c_adap;i2c_adap = i2c_get_adapter ( 0 );mpu6050_client = i2c_new_probed_device ( i2c_adap, &mpu6050_info, addr_list, NULL );i2c_put_adapter ( i2c_adap );if ( mpu6050_client )return 0;elsereturn -ENODEV;
}
static void mpu6050dev_exit ( void )
{i2c_unregister_device ( mpu6050_client );}module_init ( mpu6050dev_init );
module_exit ( mpu6050dev_exit );
MODULE_LICENSE ( "GPL" );

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/err.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <asm/uaccess.h>
#include <linux/cdev.h>static ssize_t mpu6050_write ( struct file *file, const char __user *buf, size_t, loff_t *offset );
static ssize_t mpu6050_read ( struct file *file, char __user *buf, size_t size, loff_t *offset );
static int mpu6050drv_probe ( struct i2c_client *i2c_client, const struct i2c_device_id *i2c_device_id );
static int mpu6050drv_remove ( struct i2c_client *i2c_client );static struct i2c_device_id mpu6050drv_id =
{.name = "mpu6050",.driver_data = 0x68,};static struct i2c_driver mpu6050drv =
{.driver    = {.name    = "mympu6050",.owner    = THIS_MODULE,},.probe = mpu6050drv_probe,.remove = mpu6050drv_remove,.id_table = &mpu6050drv_id,};/* 字符设备相关 */
int major = 0;
static struct cdev mpu6050_cdev;
static struct file_operations mpu6050ops =
{.owner = THIS_MODULE,.read = mpu6050_read,.write = mpu6050_write,
};static struct class *cls;
static ssize_t mpu6050_read ( struct file *file, char __user *buf, size_t size, loff_t *offset )
{return 0;
}static ssize_t mpu6050_write ( struct file *file, const char __user *buf, size_t size, loff_t *offset )
{return 0;
}
static int mpu6050drv_probe ( struct i2c_client *i2c_client, const struct i2c_device_id *i2c_device_id )
{dev_t dev = 0;printk ( "mpu6050drv_probe\r\n" );
#if 0/* 把mpu6050当做字符设备注册到内核 */major = register_chrdev ( 0, "mpu6050", &mpu6050ops );
#elsealloc_chrdev_region ( &dev, 0, 2, "mpu6050_region" );        // 占用2个次设备号cdev_init ( &mpu6050_cdev, &mpu6050ops );mpu6050_cdev.owner = THIS_MODULE;cdev_add ( &mpu6050_cdev, dev, 2 );                            // 占用2个次设备号#endifcls = class_create ( THIS_MODULE, "mpu6050cls" );major = MAJOR ( dev );device_create ( cls, NULL, MKDEV ( major, 0 ), NULL, "mpu6050" );
//    device_create ( cls, NULL, MKDEV ( major, 1 ), NULL, "mpu6050_2" );return 0;
}
static int mpu6050drv_remove ( struct i2c_client *i2c_client )
{printk ( "mpu6050drv_remove\r\n" );unregister_chrdev_region ( 0, 1 );cdev_del ( &mpu6050_cdev );device_destroy ( cls, MKDEV ( major, 0 ) );
//    device_destroy ( cls, MKDEV ( major, 1 ) );
    class_destroy ( cls );return 0;
}
static int mpu6050_init ( void )
{i2c_add_driver ( &mpu6050drv );return 0;
}static void mpu6050_exit ( void )
{i2c_del_driver ( &mpu6050drv );}module_init ( mpu6050_init );
module_exit ( mpu6050_exit );
MODULE_LICENSE ( "GPL" );