IIC16bit数据读

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该函数读16位数据，高位在前，低位在后 

static int read_reg(const struct i2c_client *client, unsigned int *buf , unsigned char address)
{
	struct i2c_msg msg[2];
	int ret;
	unsigned char date1[2];
 
	msg[0].addr  = client->addr;  
	msg[0].buf   = &address;              
	msg[0].len   = 1;                     
	msg[0].flags = 0;                   
 
	msg[1].addr  = client->addr; 
	msg[1].buf   = date1;                 
	msg[1].len   = 2;                    
	msg[1].flags = I2C_M_RD;                   
 
	ret = i2c_transfer(client->adapter, msg, 2);
	if (ret > 0)
	{
		printk(KERN_INFO "date1 : %d date1 :%d\n",date1[0],date1[1]);
		*buf = (date1[0] << 8) | (date1[1]); 
		return 1;
	}
	else
		return -EIO;

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作者：Mr.Wang_H 
来源：CSDN 
原文：https://blog.csdn.net/qq_33166886/article/details/83892644 
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