Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
[linux-2.6] / arch / arm / mach-versatile / clock.c
1 /*
2  *  linux/arch/arm/mach-versatile/clock.c
3  *
4  *  Copyright (C) 2004 ARM Limited.
5  *  Written by Deep Blue Solutions Limited.
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License version 2 as
9  * published by the Free Software Foundation.
10  */
11 #include <linux/module.h>
12 #include <linux/kernel.h>
13 #include <linux/device.h>
14 #include <linux/list.h>
15 #include <linux/errno.h>
16 #include <linux/err.h>
17 #include <linux/string.h>
18 #include <linux/clk.h>
19 #include <linux/mutex.h>
20
21 #include <asm/clkdev.h>
22 #include <asm/hardware/icst307.h>
23
24 #include "clock.h"
25
26 int clk_enable(struct clk *clk)
27 {
28         return 0;
29 }
30 EXPORT_SYMBOL(clk_enable);
31
32 void clk_disable(struct clk *clk)
33 {
34 }
35 EXPORT_SYMBOL(clk_disable);
36
37 unsigned long clk_get_rate(struct clk *clk)
38 {
39         return clk->rate;
40 }
41 EXPORT_SYMBOL(clk_get_rate);
42
43 long clk_round_rate(struct clk *clk, unsigned long rate)
44 {
45         struct icst307_vco vco;
46         vco = icst307_khz_to_vco(clk->params, rate / 1000);
47         return icst307_khz(clk->params, vco) * 1000;
48 }
49 EXPORT_SYMBOL(clk_round_rate);
50
51 int clk_set_rate(struct clk *clk, unsigned long rate)
52 {
53         int ret = -EIO;
54
55         if (clk->setvco) {
56                 struct icst307_vco vco;
57
58                 vco = icst307_khz_to_vco(clk->params, rate / 1000);
59                 clk->rate = icst307_khz(clk->params, vco) * 1000;
60                 clk->setvco(clk, vco);
61                 ret = 0;
62         }
63         return ret;
64 }
65 EXPORT_SYMBOL(clk_set_rate);