linux uart驱动代码

sudo chmod 666 /dev/ttyS0

ls /dev/ttyS*

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/tty.h>
#include <linux/serial_core.h>

static struct uart_driver my_uart_driver = {
    .owner = THIS_MODULE,
    .driver_name = "my_uart",
    .dev_name = "ttyMYUART",
    .major = 240, /* 主设备号 */
    .minor = 0,   /* 次设备号起始 */
    .nr = 1,      /* 设备数量 */
};

static int __init my_uart_init(void) {
    int ret;

    ret = uart_register_driver(&my_uart_driver);
    if (ret) {
        printk(KERN_ERR "Failed to register UART driver\n");
        return ret;
    }

    return 0;
}

static void __exit my_uart_exit(void) {
    uart_unregister_driver(&my_uart_driver);
}

module_init(my_uart_init);
module_exit(my_uart_exit);

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