linux uart驱动开发

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

static struct uart_driver my_uart_driver = {
    .owner = THIS_MODULE,
    .driver_name = "my_uart",
    .dev_name = "ttyMYUART",
    .major = 0, // 动态分配主设备号
    .minor = 0,
    .nr = 1, // 支持的设备数量
};

static int my_uart_open(struct tty_struct *tty, struct file *filp) {
    // 初始化UART硬件
    return 0;
}

static void my_uart_close(struct tty_struct *tty, struct file *filp) {
    // 关闭UART硬件
}

static const struct tty_operations my_uart_ops = {
    .open = my_uart_open,
    .close = my_uart_close,
    // 其他操作如read, write等
};

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
");
        return ret;
    }
    // 注册UART端口
    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_AUTHOR("Your Name");
MODULE_DESCRIPTION("A simple UART driver example");