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Merge with Linus' kernel.
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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>
17 #include <linux/string.h>
18
19 #include <asm/semaphore.h>
20 #include <asm/hardware/clock.h>
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
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);