/**
* irq_clear_pending - clear the irq pending
* @channel: same as irq_init() channel
*/
void irq_clear_pending(unsigned int channel)
{
switch(irq_class(channel)) {
case ic_timer:
timer_clear_pending(irq_minor(channel));
break;
}
}
static int __init irq_init(void)
{
int ret;
printk(KERN_ALERT "~~~~~~~~~~~~~~~~~~~~~~~~~~~~ IRQ - Driver inserted ... hai ~~~~~~~~~~~~~~~~~~~~~~~~~~~ \n");
memset(&switch_interrupt,0,sizeof(switch_interrupt));
ret=request_irq (12, (irq_handler_t) my_isr, IRQF_SHARED, "mouse_irq", (void *)(my_isr));
if (irq_cdev() < 0) //function to create device nodes
goto fail_1;
if (irq_class() < 0) //function to create class
goto fail_2;
//own_attr();
/*
//----------------netlink-----------------------------
nl_sk=netlink_kernel_create(&init_net, NETLINK_USER, 0,hello_nl_recv_msg, NULL, THIS_MODULE);
if(!nl_sk)
{
printk(KERN_ALERT "Error creating socket.\n");
return -10;
}
//----------------------------------------------------
*/
usr_mode_app();
return 0;
fail_2:
cdev_del(&switch_interrupt.cdev_own);
unregister_chrdev_region(switch_interrupt.devt, 1);
fail_1:
return -1;
}
/**
* irq_init - set interrupt service routine
*
* @channel: irq channel, define in irq.h
* @func: isr function
*/
int irq_init(unsigned int channel, irq_func_t func)
{
pr_info("IRF(%x) address 0x%p\n", channel, func);
switch(irq_class(channel)) {
case ic_ext:
irq_set_ext(irq_minor(channel), func);
break;
case ic_timer:
irq_set_timer(irq_minor(channel), func);
break;
case ic_uart:
irq_set_uart(irq_minor(channel), func);
break;
default:
pr_err("unknown irq channel class! 0x%p\n", channel);
break;
}
return 0;
}