linux系统i2c总线上设备

#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/err.h>

static struct i2c_client *client;

static int my_probe(struct i2c_client *client, const struct i2c_device_id *id) {
    int ret;
    u8 data;

    client = client;
    ret = i2c_smbus_read_byte_data(client, 0x00);  // 读取地址0x00的数据
    if (ret < 0) {
        dev_err(&client->dev, "Failed to read from device\n");
        return ret;
    }
    data = ret;
    printk(KERN_INFO "Read data: 0x%02x\n", data);

    return 0;
}

static int my_remove(struct i2c_client *client) {
    return 0;
}

static const struct i2c_device_id my_id[] = {
    { "my_i2c_device", 0 },
    { }
};
MODULE_DEVICE_TABLE(i2c, my_id);

static struct i2c_driver my_driver = {
    .driver = {
        .name = "my_i2c_driver",
    },
    .probe = my_probe,
    .remove = my_remove,
    .id_table = my_id,
};

module_i2c_driver(my_driver);

MODULE_AUTHOR("Your Name");
MODULE_DESCRIPTION("A simple I2C driver example");
MODULE_LICENSE("GPL");