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Diffstat (limited to 'arch/arm/mach-realview/clock.c')
-rw-r--r--arch/arm/mach-realview/clock.c80
1 files changed, 5 insertions, 75 deletions
diff --git a/arch/arm/mach-realview/clock.c b/arch/arm/mach-realview/clock.c
index 3e706c57833..a7043115de7 100644
--- a/arch/arm/mach-realview/clock.c
+++ b/arch/arm/mach-realview/clock.c
@@ -10,9 +10,11 @@
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/device.h>
13#include <linux/list.h> 14#include <linux/list.h>
14#include <linux/errno.h> 15#include <linux/errno.h>
15#include <linux/err.h> 16#include <linux/err.h>
17#include <linux/string.h>
16#include <linux/clk.h> 18#include <linux/clk.h>
17#include <linux/mutex.h> 19#include <linux/mutex.h>
18 20
@@ -20,32 +22,6 @@
20 22
21#include "clock.h" 23#include "clock.h"
22 24
23static LIST_HEAD(clocks);
24static DEFINE_MUTEX(clocks_mutex);
25
26struct clk *clk_get(struct device *dev, const char *id)
27{
28 struct clk *p, *clk = ERR_PTR(-ENOENT);
29
30 mutex_lock(&clocks_mutex);
31 list_for_each_entry(p, &clocks, node) {
32 if (strcmp(id, p->name) == 0 && try_module_get(p->owner)) {
33 clk = p;
34 break;
35 }
36 }
37 mutex_unlock(&clocks_mutex);
38
39 return clk;
40}
41EXPORT_SYMBOL(clk_get);
42
43void clk_put(struct clk *clk)
44{
45 module_put(clk->owner);
46}
47EXPORT_SYMBOL(clk_put);
48
49int clk_enable(struct clk *clk) 25int clk_enable(struct clk *clk)
50{ 26{
51 return 0; 27 return 0;
@@ -65,7 +41,9 @@ EXPORT_SYMBOL(clk_get_rate);
65 41
66long clk_round_rate(struct clk *clk, unsigned long rate) 42long clk_round_rate(struct clk *clk, unsigned long rate)
67{ 43{
68 return rate; 44 struct icst307_vco vco;
45 vco = icst307_khz_to_vco(clk->params, rate / 1000);
46 return icst307_khz(clk->params, vco) * 1000;
69} 47}
70EXPORT_SYMBOL(clk_round_rate); 48EXPORT_SYMBOL(clk_round_rate);
71 49
@@ -78,57 +56,9 @@ int clk_set_rate(struct clk *clk, unsigned long rate)
78 56
79 vco = icst307_khz_to_vco(clk->params, rate / 1000); 57 vco = icst307_khz_to_vco(clk->params, rate / 1000);
80 clk->rate = icst307_khz(clk->params, vco) * 1000; 58 clk->rate = icst307_khz(clk->params, vco) * 1000;
81
82 printk("Clock %s: setting VCO reg params: S=%d R=%d V=%d\n",
83 clk->name, vco.s, vco.r, vco.v);
84
85 clk->setvco(clk, vco); 59 clk->setvco(clk, vco);
86 ret = 0; 60 ret = 0;
87 } 61 }
88 return ret; 62 return ret;
89} 63}
90EXPORT_SYMBOL(clk_set_rate); 64EXPORT_SYMBOL(clk_set_rate);
91
92/*
93 * These are fixed clocks.
94 */
95static struct clk kmi_clk = {
96 .name = "KMIREFCLK",
97 .rate = 24000000,
98};
99
100static struct clk uart_clk = {
101 .name = "UARTCLK",
102 .rate = 24000000,
103};
104
105static struct clk mmci_clk = {
106 .name = "MCLK",
107 .rate = 33000000,
108};
109
110int clk_register(struct clk *clk)
111{
112 mutex_lock(&clocks_mutex);
113 list_add(&clk->node, &clocks);
114 mutex_unlock(&clocks_mutex);
115 return 0;
116}
117EXPORT_SYMBOL(clk_register);
118
119void clk_unregister(struct clk *clk)
120{
121 mutex_lock(&clocks_mutex);
122 list_del(&clk->node);
123 mutex_unlock(&clocks_mutex);
124}
125EXPORT_SYMBOL(clk_unregister);
126
127static int __init clk_init(void)
128{
129 clk_register(&kmi_clk);
130 clk_register(&uart_clk);
131 clk_register(&mmci_clk);
132 return 0;
133}
134arch_initcall(clk_init);