LXR linux/include/linux/of

   1#ifndef __OF_IRQ_H
   2#define __OF_IRQ_H
   3
   4#include <linux/types.h>
   5#include <linux/errno.h>
   6#include <linux/irq.h>
   7#include <linux/irqdomain.h>
   8#include <linux/ioport.h>
   9#include <linux/of.h>
  10
  11typedef int (*of_irq_init_cb_t)(struct device_node *, struct device_node *);
  12
  13/*
  14 * Workarounds only applied to 32bit powermac machines
  15 */
  16#define OF_IMAP_OLDWORLD_MAC    0x00000001
  17#define OF_IMAP_NO_PHANDLE      0x00000002
  18
  19#if defined(CONFIG_PPC32) && defined(CONFIG_PPC_PMAC)
  20extern unsigned int of_irq_workarounds;
  21extern struct device_node *of_irq_dflt_pic;
  22extern int of_irq_parse_oldworld(struct device_node *device, int index,
  23                               struct of_phandle_args *out_irq);
  24#else /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
  25#define of_irq_workarounds (0)
  26#define of_irq_dflt_pic (NULL)
  27static inline int of_irq_parse_oldworld(struct device_node *device, int index,
  28                                      struct of_phandle_args *out_irq)
  29{
  30        return -EINVAL;
  31}
  32#endif /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
  33
  34extern int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq);
  35extern int of_irq_parse_one(struct device_node *device, int index,
  36                          struct of_phandle_args *out_irq);
  37extern unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data);
  38extern int of_irq_to_resource(struct device_node *dev, int index,
  39                              struct resource *r);
  40extern int of_irq_to_resource_table(struct device_node *dev,
  41                struct resource *res, int nr_irqs);
  42
  43extern void of_irq_init(const struct of_device_id *matches);
  44
  45#ifdef CONFIG_OF_IRQ
  46extern int of_irq_count(struct device_node *dev);
  47extern int of_irq_get(struct device_node *dev, int index);
  48extern int of_irq_get_byname(struct device_node *dev, const char *name);
  49#else
  50static inline int of_irq_count(struct device_node *dev)
  51{
  52        return 0;
  53}
  54static inline int of_irq_get(struct device_node *dev, int index)
  55{
  56        return 0;
  57}
  58static inline int of_irq_get_byname(struct device_node *dev, const char *name)
  59{
  60        return 0;
  61}
  62#endif
  63
  64#if defined(CONFIG_OF)
  65/*
  66 * irq_of_parse_and_map() is used by all OF enabled platforms; but SPARC
  67 * implements it differently.  However, the prototype is the same for all,
  68 * so declare it here regardless of the CONFIG_OF_IRQ setting.
  69 */
  70extern unsigned int irq_of_parse_and_map(struct device_node *node, int index);
  71extern struct device_node *of_irq_find_parent(struct device_node *child);
  72
  73#else /* !CONFIG_OF */
  74static inline unsigned int irq_of_parse_and_map(struct device_node *dev,
  75                                                int index)
  76{
  77        return 0;
  78}
  79
  80static inline void *of_irq_find_parent(struct device_node *child)
  81{
  82        return NULL;
  83}
  84#endif /* !CONFIG_OF */
  85
  86#endif /* __OF_IRQ_H */
  87