NAME
request_RTirq - install an interrupt handler
WARNING
This is RTL v1.x compatibility function. Please do not use it for new programs.
SYNOPSIS
#define MODULE #include <linux/module.h> #include <linux/kernel.h> #include <linux/version.h> #include <linux/errno.h> #include <linux/rtf.h> #include <asm/rt_irq.h>
int request_RTirq(unsigned int irq, void (*handler)(void));
DESCRIPTION
request_RTirq installs handler as an interrupt service routine for IRQ level irq. handler is then invoked whenever interrupt number irq occurs. The interrupt service routine can be uninstalled using free_RTirq.
RETURN VALUE
On success, 0 is returned. On failure, a negative value is returned as described below.
ERRORS
- -EINVAL
-
irq is not a valid IRQ number, or handler is NULL.
- -EBUSY
-
irq already has a handler. You must first call free_RTirq to make the IRQ available.