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1 | /* |
2 | * linux/arch/arm/mach-aaec2000/clock.c | |
3 | * | |
4 | * Copyright (C) 2005 Nicolas Bellido Y Ortega | |
5 | * | |
6 | * Based on linux/arch/arm/mach-integrator/clock.c | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | #include <linux/module.h> | |
13 | #include <linux/kernel.h> | |
14 | #include <linux/list.h> | |
15 | #include <linux/errno.h> | |
16 | #include <linux/err.h> | |
8c65b4a6 | 17 | #include <linux/string.h> |
f8ce2547 | 18 | #include <linux/clk.h> |
00431707 | 19 | #include <linux/mutex.h> |
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20 | |
21 | #include <asm/semaphore.h> | |
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22 | |
23 | #include "clock.h" | |
24 | ||
25 | static LIST_HEAD(clocks); | |
00431707 | 26 | static DEFINE_MUTEX(clocks_mutex); |
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27 | |
28 | struct clk *clk_get(struct device *dev, const char *id) | |
29 | { | |
30 | struct clk *p, *clk = ERR_PTR(-ENOENT); | |
31 | ||
00431707 | 32 | mutex_lock(&clocks_mutex); |
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33 | list_for_each_entry(p, &clocks, node) { |
34 | if (strcmp(id, p->name) == 0 && try_module_get(p->owner)) { | |
35 | clk = p; | |
36 | break; | |
37 | } | |
38 | } | |
00431707 | 39 | mutex_unlock(&clocks_mutex); |
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40 | |
41 | return clk; | |
42 | } | |
43 | EXPORT_SYMBOL(clk_get); | |
44 | ||
45 | void clk_put(struct clk *clk) | |
46 | { | |
47 | module_put(clk->owner); | |
48 | } | |
49 | EXPORT_SYMBOL(clk_put); | |
50 | ||
51 | int clk_enable(struct clk *clk) | |
52 | { | |
53 | return 0; | |
54 | } | |
55 | EXPORT_SYMBOL(clk_enable); | |
56 | ||
57 | void clk_disable(struct clk *clk) | |
58 | { | |
59 | } | |
60 | EXPORT_SYMBOL(clk_disable); | |
61 | ||
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62 | unsigned long clk_get_rate(struct clk *clk) |
63 | { | |
64 | return clk->rate; | |
65 | } | |
66 | EXPORT_SYMBOL(clk_get_rate); | |
67 | ||
68 | long clk_round_rate(struct clk *clk, unsigned long rate) | |
69 | { | |
70 | return rate; | |
71 | } | |
72 | EXPORT_SYMBOL(clk_round_rate); | |
73 | ||
74 | int clk_set_rate(struct clk *clk, unsigned long rate) | |
75 | { | |
76 | return 0; | |
77 | } | |
78 | EXPORT_SYMBOL(clk_set_rate); | |
79 | ||
80 | int clk_register(struct clk *clk) | |
81 | { | |
00431707 | 82 | mutex_lock(&clocks_mutex); |
4224b67c | 83 | list_add(&clk->node, &clocks); |
00431707 | 84 | mutex_unlock(&clocks_mutex); |
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85 | return 0; |
86 | } | |
87 | EXPORT_SYMBOL(clk_register); | |
88 | ||
89 | void clk_unregister(struct clk *clk) | |
90 | { | |
00431707 | 91 | mutex_lock(&clocks_mutex); |
4224b67c | 92 | list_del(&clk->node); |
00431707 | 93 | mutex_unlock(&clocks_mutex); |
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94 | } |
95 | EXPORT_SYMBOL(clk_unregister); | |
96 | ||
97 | static int __init clk_init(void) | |
98 | { | |
99 | return 0; | |
100 | } | |
101 | arch_initcall(clk_init); |