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Diffstat (limited to 'arch/arm/mach-integrator/clock.c')
-rw-r--r--arch/arm/mach-integrator/clock.c80
1 files changed, 4 insertions, 76 deletions
diff --git a/arch/arm/mach-integrator/clock.c b/arch/arm/mach-integrator/clock.c
index 8d761fdd2ec..989ecf5f5c4 100644
--- a/arch/arm/mach-integrator/clock.c
+++ b/arch/arm/mach-integrator/clock.c
@@ -10,42 +10,12 @@
10 */ 10 */
11#include <linux/module.h> 11#include <linux/module.h>
12#include <linux/kernel.h> 12#include <linux/kernel.h>
13#include <linux/list.h>
14#include <linux/errno.h> 13#include <linux/errno.h>
15#include <linux/err.h>
16#include <linux/string.h>
17#include <linux/clk.h> 14#include <linux/clk.h>
18#include <linux/mutex.h> 15#include <linux/mutex.h>
19 16
20#include <asm/hardware/icst525.h> 17#include <asm/clkdev.h>
21 18#include <mach/clkdev.h>
22#include "clock.h"
23
24static LIST_HEAD(clocks);
25static DEFINE_MUTEX(clocks_mutex);
26
27struct clk *clk_get(struct device *dev, const char *id)
28{
29 struct clk *p, *clk = ERR_PTR(-ENOENT);
30
31 mutex_lock(&clocks_mutex);
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 mutex_unlock(&clocks_mutex);
39
40 return clk;
41}
42EXPORT_SYMBOL(clk_get);
43
44void clk_put(struct clk *clk)
45{
46 module_put(clk->owner);
47}
48EXPORT_SYMBOL(clk_put);
49 19
50int clk_enable(struct clk *clk) 20int clk_enable(struct clk *clk)
51{ 21{
@@ -67,7 +37,6 @@ EXPORT_SYMBOL(clk_get_rate);
67long clk_round_rate(struct clk *clk, unsigned long rate) 37long clk_round_rate(struct clk *clk, unsigned long rate)
68{ 38{
69 struct icst525_vco vco; 39 struct icst525_vco vco;
70
71 vco = icst525_khz_to_vco(clk->params, rate / 1000); 40 vco = icst525_khz_to_vco(clk->params, rate / 1000);
72 return icst525_khz(clk->params, vco) * 1000; 41 return icst525_khz(clk->params, vco) * 1000;
73} 42}
@@ -76,56 +45,15 @@ EXPORT_SYMBOL(clk_round_rate);
76int clk_set_rate(struct clk *clk, unsigned long rate) 45int clk_set_rate(struct clk *clk, unsigned long rate)
77{ 46{
78 int ret = -EIO; 47 int ret = -EIO;
48
79 if (clk->setvco) { 49 if (clk->setvco) {
80 struct icst525_vco vco; 50 struct icst525_vco vco;
81 51
82 vco = icst525_khz_to_vco(clk->params, rate / 1000); 52 vco = icst525_khz_to_vco(clk->params, rate / 1000);
83 clk->rate = icst525_khz(clk->params, vco) * 1000; 53 clk->rate = icst525_khz(clk->params, vco) * 1000;
84
85 printk("Clock %s: setting VCO reg params: S=%d R=%d V=%d\n",
86 clk->name, vco.s, vco.r, vco.v);
87
88 clk->setvco(clk, vco); 54 clk->setvco(clk, vco);
89 ret = 0; 55 ret = 0;
90 } 56 }
91 return 0; 57 return ret;
92} 58}
93EXPORT_SYMBOL(clk_set_rate); 59EXPORT_SYMBOL(clk_set_rate);
94
95/*
96 * These are fixed clocks.
97 */
98static struct clk kmi_clk = {
99 .name = "KMIREFCLK",
100 .rate = 24000000,
101};
102
103static struct clk uart_clk = {
104 .name = "UARTCLK",
105 .rate = 14745600,
106};
107
108int clk_register(struct clk *clk)
109{
110 mutex_lock(&clocks_mutex);
111 list_add(&clk->node, &clocks);
112 mutex_unlock(&clocks_mutex);
113 return 0;
114}
115EXPORT_SYMBOL(clk_register);
116
117void clk_unregister(struct clk *clk)
118{
119 mutex_lock(&clocks_mutex);
120 list_del(&clk->node);
121 mutex_unlock(&clocks_mutex);
122}
123EXPORT_SYMBOL(clk_unregister);
124
125static int __init clk_init(void)
126{
127 clk_register(&kmi_clk);
128 clk_register(&uart_clk);
129 return 0;
130}
131arch_initcall(clk_init);