linux 中断示例

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

static int irq;
static char *devname;

module_param(irq, int, 0644);
module_param(devname, charp, 0644);

struct myirq
{
    int devid;
};

struct myirq mydev = {1119};

//irq handler function
static irqreturn_t myirq_handler(int irq, void *dev)
{
    struct myirq mydev;
    static int count = 1;

    mydev = *(struct myirq *)dev;
    count ++;

    return IRQ_HANDLED;
}

static int __init myirq_init(void)
{
    if (request_irq(irq, myirq_handler, IRQF_SHARED, devname, &mydev) != 0) {
        return -1;
    }

    return 0;
}

static void __exit myirq_exit(void)
{
    free_irq(irq, &mydev);
}

module_init(myirq_init);
module_exit(myirq_exit);

MODULE_LICENSE("GPL");

sudo insmod interrupt.ko irq=1 devname=myirq