include/linux/of_irq.h

   1 #ifndef __OF_IRQ_H
   2 #define __OF_IRQ_H
   3
   4 #if defined(CONFIG_OF)
   5 struct of_irq;
   6 #include <linux/types.h>
   7 #include <linux/of.h>
   8
   9 /*
  10  * irq_of_parse_and_map() is used ba all OF enabled platforms; but SPARC
  11  * implements it differently.  However, the prototype is the same for all,
  12  * so declare it here regardless of the CONFIG_OF_IRQ setting.
  13  */
  14 extern unsigned int irq_of_parse_and_map(struct device_node *node, int index);
  15
  16 #if defined(CONFIG_OF_IRQ)
  17 /**
  18  * of_irq - container for device_node/irq_specifier pair for an irq controller
  19  * @controller: pointer to interrupt controller device tree node
  20  * @size: size of interrupt specifier
  21  * @specifier: array of cells @size long specifing the specific interrupt
  22  *
  23  * This structure is returned when an interrupt is mapped. The controller
  24  * field needs to be put() after use
  25  */
  26 #define OF_MAX_IRQ_SPEC         4 /* We handle specifiers of at most 4 cells */
  27 struct of_irq {
  28         struct device_node *controller; /* Interrupt controller node */
  29         u32 size; /* Specifier size */
  30         u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
  31 };
  32
  33 extern int of_irq_map_one(struct device_node *device, int index,
  34                           struct of_irq *out_irq);
  35 extern unsigned int irq_create_of_mapping(struct device_node *controller,
  36                                           const u32 *intspec,
  37                                           unsigned int intsize);
  38
  39 #endif /* CONFIG_OF_IRQ */
  40 #endif /* CONFIG_OF */
  41 #endif /* __OF_IRQ_H */