linux io中断驱动编程

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/interrupt.h>

static irqreturn_t my_interrupt_handler(int irq, void *dev_id) {
    printk(KERN_INFO "Interrupt occurred!\n");
    // 处理中断逻辑
    return IRQ_HANDLED;
}

static int __init my_module_init(void) {
    int ret;

    // 注册中断处理函数
    ret = request_irq(irq_number, my_interrupt_handler, IRQF_SHARED, "my_irq_handler", NULL);
    if (ret) {
        printk(KERN_ERR "Failed to register IRQ handler\n");
        return ret;
    }

    printk(KERN_INFO "Module loaded successfully\n");
    return 0;
}

static void __exit my_module_exit(void) {
    // 注销中断处理函数
    free_irq(irq_number, NULL);
    printk(KERN_INFO "Module unloaded successfully\n");
}

module_init(my_module_init);
module_exit(my_module_exit);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("A simple interrupt driven module");

static irqreturn_t my_interrupt_handler(int irq, void *dev_id) {
    schedule_work(&my_work);
    return IRQ_HANDLED;
}

static struct work_struct my_work;

static void my_work_handler(struct work_struct *work) {
    // 耗时操作
}

INIT_WORK(&my_work, my_work_handler);