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-rw-r--r--arch/arm/mach-ux500/clock.c95
1 files changed, 95 insertions, 0 deletions
diff --git a/arch/arm/mach-ux500/clock.c b/arch/arm/mach-ux500/clock.c
new file mode 100644
index 000000000000..20b6ebb6783a
--- /dev/null
+++ b/arch/arm/mach-ux500/clock.c
@@ -0,0 +1,95 @@
1/*
2 * Copyright (C) 2009 ST-Ericsson
3 * heavily based on realview platform
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 */
9#include <linux/module.h>
10#include <linux/kernel.h>
11#include <linux/list.h>
12#include <linux/errno.h>
13#include <linux/err.h>
14#include <linux/clk.h>
15#include <linux/mutex.h>
16
17#include <asm/clkdev.h>
18
19/* currently the clk structure
20 * just supports rate. This would
21 * be extended as and when new devices are
22 * added - TODO
23 */
24struct clk {
25 unsigned long rate;
26};
27
28int clk_enable(struct clk *clk)
29{
30 return 0;
31}
32EXPORT_SYMBOL(clk_enable);
33
34void clk_disable(struct clk *clk)
35{
36}
37EXPORT_SYMBOL(clk_disable);
38
39unsigned long clk_get_rate(struct clk *clk)
40{
41 return clk->rate;
42}
43EXPORT_SYMBOL(clk_get_rate);
44
45long clk_round_rate(struct clk *clk, unsigned long rate)
46{
47 /*TODO*/
48 return rate;
49}
50EXPORT_SYMBOL(clk_round_rate);
51
52int clk_set_rate(struct clk *clk, unsigned long rate)
53{
54 clk->rate = rate;
55 return 0;
56}
57EXPORT_SYMBOL(clk_set_rate);
58
59/* ssp clock */
60static struct clk ssp_clk = {
61 .rate = 48000000,
62};
63
64/* fixed clock */
65static struct clk f38_clk = {
66 .rate = 38400000,
67};
68
69static struct clk_lookup lookups[] = {
70 {
71 /* UART0 */
72 .dev_id = "uart0",
73 .clk = &f38_clk,
74 }, { /* UART1 */
75 .dev_id = "uart1",
76 .clk = &f38_clk,
77 }, { /* UART2 */
78 .dev_id = "uart2",
79 .clk = &f38_clk,
80 }, { /* SSP */
81 .dev_id = "pl022",
82 .clk = &ssp_clk,
83 }
84};
85
86static int __init clk_init(void)
87{
88 int i;
89
90 /* register the clock lookups */
91 for (i = 0; i < ARRAY_SIZE(lookups); i++)
92 clkdev_add(&lookups[i]);
93 return 0;
94}
95arch_initcall(clk_init);