linux i2c 设备驱动

sudo i2cdetect -y 1

// 设置I2C时钟频率
i2c_set_clock_frequency(adapter, 100000); // 100kHz

dmesg | grep i2c

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

static struct i2c_client *client;

static int my_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id) {
    printk(KERN_INFO "I2C device probed\n");
    return 0;
}

static int my_i2c_remove(struct i2c_client *client) {
    printk(KERN_INFO "I2C device removed\n");
    return 0;
}

static const struct i2c_device_id my_i2c_id[] = {
    { "my_i2c_device", 0 },
    { }
};
MODULE_DEVICE_TABLE(i2c, my_i2c_id);

static struct i2c_driver my_i2c_driver = {
    .driver = {
        .name = "my_i2c_driver",
    },
    .probe = my_i2c_probe,
    .remove = my_i2c_remove,
    .id_table = my_i2c_id,
};

module_i2c_driver(my_i2c_driver);

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