linux共享中断实现

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

static irqreturn_t my_interrupt_handler(int irq, void *dev_id)
{
    printk(KERN_INFO "Interrupt occurred on device %p\n", dev_id);
    return IRQ_HANDLED;
}

static int __init my_module_init(void)
{
    int ret;
    int irq = 10; // 假设中断号为10

    ret = request_irq(irq, my_interrupt_handler, IRQF_SHARED, "my_device", (void *)0x1234);
    if (ret) {
        printk(KERN_ERR "Unable to request IRQ %d\n", irq);
        return ret;
    }

    printk(KERN_INFO "Module loaded with IRQ %d\n", irq);
    return 0;
}

static void __exit my_module_exit(void)
{
    free_irq(10, (void *)0x1234);
    printk(KERN_INFO "Module unloaded\n");
}

module_init(my_module_init);
module_exit(my_module_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Your Name");
MODULE_DESCRIPTION("A simple shared interrupt example");