46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
/*************************************************************************
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> File Name: irq_qu.c
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> Author:
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> Mail:
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> Created Time: 2017年04月25日 星期二 09时18分44秒
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************************************************************************/
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#include<linux/init.h>
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#include<linux/module.h>
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#include<linux/kernel.h>
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#include<linux/interrupt.h>
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MODULE_LICENSE("GPL");
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static int irq = 27;
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const char *interface = "my_irq";
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static irqreturn_t myirq_handler(int irq,void *dev);
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static int __init myirq_init(void) {
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if(request_irq(irq,myirq_handler,IRQF_SHARED,interface,&irq)){
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printk(KERN_ERR "%s interrrupt can't register %d IRQ \n",interface,irq);
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return -EIO;
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}
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printk("%s request %d IRQ\n",interface,irq);
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return 0;
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}
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static irqreturn_t myirq_handler(int irq,void *dev){
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printk("my_handle %d IRQ is working\n",irq);
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return 0;
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}
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static void __exit myirq_exit(void){
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free_irq(irq,&irq);
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printk("%s interrupt free %d IRQ\n",interface,irq);
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}
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module_init(myirq_init);
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module_exit(myirq_exit);
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