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authorLinus Torvalds <torvalds@linux-foundation.org>2009-03-28 17:03:14 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-03-28 17:03:14 -0400
commit0fe41b8982001cd14ee2c77cd776735a5024e98b (patch)
tree83e65d595c413d55259ea14fb97748ce5efe5707 /arch/arm/mach-mmp/clock.c
parenteedf2c5296a8dfaaf9aec1a938c1d3bd73159a30 (diff)
parent9759d22c8348343b0da4e25d6150c41712686c14 (diff)
Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm: (422 commits) [ARM] 5435/1: fix compile warning in sanity_check_meminfo() [ARM] 5434/1: ARM: OMAP: Fix mailbox compile for 24xx [ARM] pxa: fix the bad assumption that PCMCIA sockets always start with 0 [ARM] pxa: fix Colibri PXA300 and PXA320 LCD backlight pins imxfb: Fix TFT mode i.MX21/27: remove ifdef CONFIG_FB_IMX imxfb: add clock support mxc: add arch_reset() function clkdev: add possibility to get a clock based on the device name i.MX1: remove fb support from mach-imx [ARM] pxa: build arch/arm/plat-pxa/mfp.c only when PXA3xx or ARCH_MMP defined Gemini: Add support for Teltonika RUT100 Gemini: gpiolib based GPIO support v2 MAINTAINERS: add myself as Gemini architecture maintainer ARM: Add Gemini architecture v3 [ARM] OMAP: Fix compile for omap2_init_common_hw() MAINTAINERS: Add myself as Faraday ARM core variant maintainer ARM: Add support for FA526 v2 [ARM] acorn,ebsa110,footbridge,integrator,sa1100: Convert asm/io.h to linux/io.h [ARM] collie: fix two minor formatting nits ...
Diffstat (limited to 'arch/arm/mach-mmp/clock.c')
-rw-r--r--arch/arm/mach-mmp/clock.c83
1 files changed, 83 insertions, 0 deletions
diff --git a/arch/arm/mach-mmp/clock.c b/arch/arm/mach-mmp/clock.c
new file mode 100644
index 000000000000..2d9cc5a7122f
--- /dev/null
+++ b/arch/arm/mach-mmp/clock.c
@@ -0,0 +1,83 @@
1/*
2 * linux/arch/arm/mach-mmp/clock.c
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 */
8
9#include <linux/module.h>
10#include <linux/kernel.h>
11#include <linux/list.h>
12#include <linux/spinlock.h>
13#include <linux/clk.h>
14#include <linux/io.h>
15
16#include <mach/regs-apbc.h>
17#include "clock.h"
18
19static void apbc_clk_enable(struct clk *clk)
20{
21 uint32_t clk_rst;
22
23 clk_rst = APBC_APBCLK | APBC_FNCLK | APBC_FNCLKSEL(clk->fnclksel);
24 __raw_writel(clk_rst, clk->clk_rst);
25}
26
27static void apbc_clk_disable(struct clk *clk)
28{
29 __raw_writel(0, clk->clk_rst);
30}
31
32struct clkops apbc_clk_ops = {
33 .enable = apbc_clk_enable,
34 .disable = apbc_clk_disable,
35};
36
37static DEFINE_SPINLOCK(clocks_lock);
38
39int clk_enable(struct clk *clk)
40{
41 unsigned long flags;
42
43 spin_lock_irqsave(&clocks_lock, flags);
44 if (clk->enabled++ == 0)
45 clk->ops->enable(clk);
46 spin_unlock_irqrestore(&clocks_lock, flags);
47 return 0;
48}
49EXPORT_SYMBOL(clk_enable);
50
51void clk_disable(struct clk *clk)
52{
53 unsigned long flags;
54
55 WARN_ON(clk->enabled == 0);
56
57 spin_lock_irqsave(&clocks_lock, flags);
58 if (--clk->enabled == 0)
59 clk->ops->disable(clk);
60 spin_unlock_irqrestore(&clocks_lock, flags);
61}
62EXPORT_SYMBOL(clk_disable);
63
64unsigned long clk_get_rate(struct clk *clk)
65{
66 unsigned long rate;
67
68 if (clk->ops->getrate)
69 rate = clk->ops->getrate(clk);
70 else
71 rate = clk->rate;
72
73 return rate;
74}
75EXPORT_SYMBOL(clk_get_rate);
76
77void clks_register(struct clk_lookup *clks, size_t num)
78{
79 int i;
80
81 for (i = 0; i < num; i++)
82 clkdev_add(&clks[i]);
83}