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52a65ff5 | 1 | // SPDX-License-Identifier: GPL-2.0 |
3795de23 TG |
2 | /* |
3 | * Copyright (C) 1992, 1998-2006 Linus Torvalds, Ingo Molnar | |
4 | * Copyright (C) 2005-2006, Thomas Gleixner, Russell King | |
5 | * | |
6 | * This file contains the dummy interrupt chip implementation | |
7 | */ | |
8 | #include <linux/interrupt.h> | |
9 | #include <linux/irq.h> | |
17d83127 | 10 | #include <linux/export.h> |
3795de23 TG |
11 | |
12 | #include "internals.h" | |
13 | ||
14 | /* | |
15 | * What should we do if we get a hw irq event on an illegal vector? | |
a359f757 | 16 | * Each architecture has to answer this themselves. |
3795de23 TG |
17 | */ |
18 | static void ack_bad(struct irq_data *data) | |
19 | { | |
20 | struct irq_desc *desc = irq_data_to_desc(data); | |
21 | ||
22 | print_irq_desc(data->irq, desc); | |
23 | ack_bad_irq(data->irq); | |
24 | } | |
25 | ||
26 | /* | |
27 | * NOP functions | |
28 | */ | |
29 | static void noop(struct irq_data *data) { } | |
30 | ||
31 | static unsigned int noop_ret(struct irq_data *data) | |
32 | { | |
33 | return 0; | |
34 | } | |
35 | ||
3795de23 TG |
36 | /* |
37 | * Generic no controller implementation | |
38 | */ | |
39 | struct irq_chip no_irq_chip = { | |
40 | .name = "none", | |
41 | .irq_startup = noop_ret, | |
42 | .irq_shutdown = noop, | |
43 | .irq_enable = noop, | |
44 | .irq_disable = noop, | |
45 | .irq_ack = ack_bad, | |
de8d1810 | 46 | .flags = IRQCHIP_SKIP_SET_WAKE, |
3795de23 TG |
47 | }; |
48 | ||
49 | /* | |
50 | * Generic dummy implementation which can be used for | |
51 | * real dumb interrupt sources | |
52 | */ | |
53 | struct irq_chip dummy_irq_chip = { | |
54 | .name = "dummy", | |
55 | .irq_startup = noop_ret, | |
56 | .irq_shutdown = noop, | |
57 | .irq_enable = noop, | |
58 | .irq_disable = noop, | |
59 | .irq_ack = noop, | |
60 | .irq_mask = noop, | |
61 | .irq_unmask = noop, | |
10a50f1a | 62 | .flags = IRQCHIP_SKIP_SET_WAKE, |
3795de23 | 63 | }; |
17d83127 | 64 | EXPORT_SYMBOL_GPL(dummy_irq_chip); |