Request_irq fails for IRQ2

[smitha.vanga at wipro.com]

Hi Scott,

 I try to request an IRQ (IRQ2 and IRQ3 which are ineterrupt no 20 and 21 in mpc8247)in my driver . The
Call fails in setup_irq in Manage.c at /kernel/irq.

Setup _irq returns -ENOSYS

if (desc->irq_data.chip == &no_irq_chip)
                 return -ENOSYS;

I just want to know why it fails. Below is the call to request irq in my driver.


#define CPLD1_INTERRUPT  20
if (request_irq(CPLD1_INTERRUPT,cpld_irq_handler, 0, GPIO_CHAR_PATH, NULL))
   {
      printk(KERN_ERR "gpio_init: Could not grab IRQ line for CPLD\n");
          goto err1;
   }

Regards,
Smitha



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