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3795de23 TG |
1 | /* |
2 | * Copyright (C) 1992, 1998-2006 Linus Torvalds, Ingo Molnar | |
3 | * Copyright (C) 2005-2006, Thomas Gleixner, Russell King | |
4 | * | |
5 | * This file contains the dummy interrupt chip implementation | |
6 | */ | |
7 | #include <linux/interrupt.h> | |
8 | #include <linux/irq.h> | |
17d83127 | 9 | #include <linux/export.h> |
3795de23 TG |
10 | |
11 | #include "internals.h" | |
12 | ||
13 | /* | |
14 | * What should we do if we get a hw irq event on an illegal vector? | |
15 | * Each architecture has to answer this themself. | |
16 | */ | |
17 | static void ack_bad(struct irq_data *data) | |
18 | { | |
19 | struct irq_desc *desc = irq_data_to_desc(data); | |
20 | ||
21 | print_irq_desc(data->irq, desc); | |
22 | ack_bad_irq(data->irq); | |
23 | } | |
24 | ||
25 | /* | |
26 | * NOP functions | |
27 | */ | |
28 | static void noop(struct irq_data *data) { } | |
29 | ||
30 | static unsigned int noop_ret(struct irq_data *data) | |
31 | { | |
32 | return 0; | |
33 | } | |
34 | ||
3795de23 TG |
35 | /* |
36 | * Generic no controller implementation | |
37 | */ | |
38 | struct irq_chip no_irq_chip = { | |
39 | .name = "none", | |
40 | .irq_startup = noop_ret, | |
41 | .irq_shutdown = noop, | |
42 | .irq_enable = noop, | |
43 | .irq_disable = noop, | |
44 | .irq_ack = ack_bad, | |
de8d1810 | 45 | .flags = IRQCHIP_SKIP_SET_WAKE, |
3795de23 TG |
46 | }; |
47 | ||
48 | /* | |
49 | * Generic dummy implementation which can be used for | |
50 | * real dumb interrupt sources | |
51 | */ | |
52 | struct irq_chip dummy_irq_chip = { | |
53 | .name = "dummy", | |
54 | .irq_startup = noop_ret, | |
55 | .irq_shutdown = noop, | |
56 | .irq_enable = noop, | |
57 | .irq_disable = noop, | |
58 | .irq_ack = noop, | |
59 | .irq_mask = noop, | |
60 | .irq_unmask = noop, | |
10a50f1a | 61 | .flags = IRQCHIP_SKIP_SET_WAKE, |
3795de23 | 62 | }; |
17d83127 | 63 | EXPORT_SYMBOL_GPL(dummy_irq_chip); |