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authorLinus Torvalds <torvalds@linux-foundation.org>2010-08-05 18:57:35 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2010-08-05 18:57:35 -0400
commit03c0c29aff7e56b722eb6c47eace222b140d0377 (patch)
tree47267a19b523159cf36a050ef3c35f4dbdb33016 /include/linux/of_irq.h
parentc60c6a96b7bb0f1f8bb635fdfcf5b592aaf062b4 (diff)
parent7fb8f881c54beb05dd4d2c947dada1c636581d87 (diff)
Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6
* 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6: (63 commits) of/platform: Register of_platform_drivers with an "of:" prefix of/address: Clean up function declarations of/spi: call of_register_spi_devices() from spi core code of: Provide default of_node_to_nid() implementation. of/device: Make of_device_make_bus_id() usable by other code. of/irq: Fix endian issues in parsing interrupt specifiers of: Fix phandle endian issues of/flattree: fix of_flat_dt_is_compatible() to match the full compatible string of: remove of_default_bus_ids of: make of_find_device_by_node generic microblaze: remove references to of_device and to_of_device sparc: remove references to of_device and to_of_device powerpc: remove references to of_device and to_of_device of/device: Replace of_device with platform_device in includes and core code of/device: Protect against binding of_platform_drivers to non-OF devices of: remove asm/of_device.h of: remove asm/of_platform.h of/platform: remove all of_bus_type and of_platform_bus_type references of: Merge of_platform_bus_type with platform_bus_type drivercore/of: Add OF style matching to platform bus ... Fix up trivial conflicts in arch/microblaze/kernel/Makefile due to just some obj-y removals by the devicetree branch, while the microblaze updates added a new file.
Diffstat (limited to 'include/linux/of_irq.h')
-rw-r--r--include/linux/of_irq.h70
1 files changed, 70 insertions, 0 deletions
diff --git a/include/linux/of_irq.h b/include/linux/of_irq.h
new file mode 100644
index 000000000000..5929781c104d
--- /dev/null
+++ b/include/linux/of_irq.h
@@ -0,0 +1,70 @@
1#ifndef __OF_IRQ_H
2#define __OF_IRQ_H
3
4#if defined(CONFIG_OF)
5struct of_irq;
6#include <linux/types.h>
7#include <linux/errno.h>
8#include <linux/ioport.h>
9#include <linux/of.h>
10
11/*
12 * irq_of_parse_and_map() is used ba all OF enabled platforms; but SPARC
13 * implements it differently. However, the prototype is the same for all,
14 * so declare it here regardless of the CONFIG_OF_IRQ setting.
15 */
16extern unsigned int irq_of_parse_and_map(struct device_node *node, int index);
17
18#if defined(CONFIG_OF_IRQ)
19/**
20 * of_irq - container for device_node/irq_specifier pair for an irq controller
21 * @controller: pointer to interrupt controller device tree node
22 * @size: size of interrupt specifier
23 * @specifier: array of cells @size long specifing the specific interrupt
24 *
25 * This structure is returned when an interrupt is mapped. The controller
26 * field needs to be put() after use
27 */
28#define OF_MAX_IRQ_SPEC 4 /* We handle specifiers of at most 4 cells */
29struct of_irq {
30 struct device_node *controller; /* Interrupt controller node */
31 u32 size; /* Specifier size */
32 u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
33};
34
35/*
36 * Workarounds only applied to 32bit powermac machines
37 */
38#define OF_IMAP_OLDWORLD_MAC 0x00000001
39#define OF_IMAP_NO_PHANDLE 0x00000002
40
41#if defined(CONFIG_PPC32) && defined(CONFIG_PPC_PMAC)
42extern unsigned int of_irq_workarounds;
43extern struct device_node *of_irq_dflt_pic;
44extern int of_irq_map_oldworld(struct device_node *device, int index,
45 struct of_irq *out_irq);
46#else /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
47#define of_irq_workarounds (0)
48#define of_irq_dflt_pic (NULL)
49static inline int of_irq_map_oldworld(struct device_node *device, int index,
50 struct of_irq *out_irq)
51{
52 return -EINVAL;
53}
54#endif /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
55
56
57extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
58 u32 ointsize, const u32 *addr,
59 struct of_irq *out_irq);
60extern int of_irq_map_one(struct device_node *device, int index,
61 struct of_irq *out_irq);
62extern unsigned int irq_create_of_mapping(struct device_node *controller,
63 const u32 *intspec,
64 unsigned int intsize);
65extern int of_irq_to_resource(struct device_node *dev, int index,
66 struct resource *r);
67
68#endif /* CONFIG_OF_IRQ */
69#endif /* CONFIG_OF */
70#endif /* __OF_IRQ_H */