1/*
2 *  This program is free software; you can redistribute it and/or modify it
3 *  under the terms of the GNU General Public License version 2 as published
4 *  by the Free Software Foundation.
5 *
6 *  Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
7 *  Copyright (C) 2013 John Crispin <blogic@openwrt.org>
8 */
9
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/clkdev.h>
13#include <linux/clk.h>
14
15#include <asm/time.h>
16
17#include "common.h"
18
19struct clk {
20	struct clk_lookup cl;
21	unsigned long rate;
22};
23
24void ralink_clk_add(const char *dev, unsigned long rate)
25{
26	struct clk *clk = kzalloc(sizeof(struct clk), GFP_KERNEL);
27
28	if (!clk)
29		panic("failed to add clock");
30
31	clk->cl.dev_id = dev;
32	clk->cl.clk = clk;
33
34	clk->rate = rate;
35
36	clkdev_add(&clk->cl);
37}
38
39/*
40 * Linux clock API
41 */
42int clk_enable(struct clk *clk)
43{
44	return 0;
45}
46EXPORT_SYMBOL_GPL(clk_enable);
47
48void clk_disable(struct clk *clk)
49{
50}
51EXPORT_SYMBOL_GPL(clk_disable);
52
53unsigned long clk_get_rate(struct clk *clk)
54{
55	return clk->rate;
56}
57EXPORT_SYMBOL_GPL(clk_get_rate);
58
59int clk_set_rate(struct clk *clk, unsigned long rate)
60{
61	return -1;
62}
63EXPORT_SYMBOL_GPL(clk_set_rate);
64
65void __init plat_time_init(void)
66{
67	struct clk *clk;
68
69	ralink_of_remap();
70
71	ralink_clk_init();
72	clk = clk_get_sys("cpu", NULL);
73	if (IS_ERR(clk))
74		panic("unable to get CPU clock, err=%ld", PTR_ERR(clk));
75	pr_info("CPU Clock: %ldMHz\n", clk_get_rate(clk) / 1000000);
76	mips_hpt_frequency = clk_get_rate(clk) / 2;
77	clk_put(clk);
78	clocksource_of_init();
79}
80