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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> |
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19 | |
20 | #include <asm/semaphore.h> | |
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21 | |
22 | #include "clock.h" | |
23 | ||
24 | static LIST_HEAD(clocks); | |
25 | static DECLARE_MUTEX(clocks_sem); | |
26 | ||
27 | struct clk *clk_get(struct device *dev, const char *id) | |
28 | { | |
29 | struct clk *p, *clk = ERR_PTR(-ENOENT); | |
30 | ||
31 | down(&clocks_sem); | |
32 | list_for_each_entry(p, &clocks, node) { | |
33 | if (strcmp(id, p->name) == 0 && try_module_get(p->owner)) { | |
34 | clk = p; | |
35 | break; | |
36 | } | |
37 | } | |
38 | up(&clocks_sem); | |
39 | ||
40 | return clk; | |
41 | } | |
42 | EXPORT_SYMBOL(clk_get); | |
43 | ||
44 | void clk_put(struct clk *clk) | |
45 | { | |
46 | module_put(clk->owner); | |
47 | } | |
48 | EXPORT_SYMBOL(clk_put); | |
49 | ||
50 | int clk_enable(struct clk *clk) | |
51 | { | |
52 | return 0; | |
53 | } | |
54 | EXPORT_SYMBOL(clk_enable); | |
55 | ||
56 | void clk_disable(struct clk *clk) | |
57 | { | |
58 | } | |
59 | EXPORT_SYMBOL(clk_disable); | |
60 | ||
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61 | unsigned long clk_get_rate(struct clk *clk) |
62 | { | |
63 | return clk->rate; | |
64 | } | |
65 | EXPORT_SYMBOL(clk_get_rate); | |
66 | ||
67 | long clk_round_rate(struct clk *clk, unsigned long rate) | |
68 | { | |
69 | return rate; | |
70 | } | |
71 | EXPORT_SYMBOL(clk_round_rate); | |
72 | ||
73 | int clk_set_rate(struct clk *clk, unsigned long rate) | |
74 | { | |
75 | return 0; | |
76 | } | |
77 | EXPORT_SYMBOL(clk_set_rate); | |
78 | ||
79 | int clk_register(struct clk *clk) | |
80 | { | |
81 | down(&clocks_sem); | |
82 | list_add(&clk->node, &clocks); | |
83 | up(&clocks_sem); | |
84 | return 0; | |
85 | } | |
86 | EXPORT_SYMBOL(clk_register); | |
87 | ||
88 | void clk_unregister(struct clk *clk) | |
89 | { | |
90 | down(&clocks_sem); | |
91 | list_del(&clk->node); | |
92 | up(&clocks_sem); | |
93 | } | |
94 | EXPORT_SYMBOL(clk_unregister); | |
95 | ||
96 | static int __init clk_init(void) | |
97 | { | |
98 | return 0; | |
99 | } | |
100 | arch_initcall(clk_init); |