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 <john@phrozen.org>
 8 */
 9
10#include <linux/kernel.h>
11#include <linux/init.h>
12#include <linux/export.h>
13#include <linux/clkdev.h>
14#include <linux/clk.h>
15
16#include <asm/time.h>
17
18#include "common.h"
19
20struct clk {
21	struct clk_lookup cl;
22	unsigned long rate;
23};
24
25void ralink_clk_add(const char *dev, unsigned long rate)
26{
27	struct clk *clk = kzalloc(sizeof(struct clk), GFP_KERNEL);
28
29	if (!clk)
30		panic("failed to add clock");
31
32	clk->cl.dev_id = dev;
33	clk->cl.clk = clk;
34
35	clk->rate = rate;
36
37	clkdev_add(&clk->cl);
38}
39
40/*
41 * Linux clock API
42 */
43int clk_enable(struct clk *clk)
44{
45	return 0;
46}
47EXPORT_SYMBOL_GPL(clk_enable);
48
49void clk_disable(struct clk *clk)
50{
51}
52EXPORT_SYMBOL_GPL(clk_disable);
53
54unsigned long clk_get_rate(struct clk *clk)
55{
56	if (!clk)
57		return 0;
58
59	return clk->rate;
60}
61EXPORT_SYMBOL_GPL(clk_get_rate);
62
63int clk_set_rate(struct clk *clk, unsigned long rate)
64{
65	return -1;
66}
67EXPORT_SYMBOL_GPL(clk_set_rate);
68
69long clk_round_rate(struct clk *clk, unsigned long rate)
70{
71	return -1;
72}
73EXPORT_SYMBOL_GPL(clk_round_rate);
74
75void __init plat_time_init(void)
76{
77	struct clk *clk;
78
79	ralink_of_remap();
80
81	ralink_clk_init();
82	clk = clk_get_sys("cpu", NULL);
83	if (IS_ERR(clk))
84		panic("unable to get CPU clock, err=%ld", PTR_ERR(clk));
85	pr_info("CPU Clock: %ldMHz\n", clk_get_rate(clk) / 1000000);
86	mips_hpt_frequency = clk_get_rate(clk) / 2;
87	clk_put(clk);
88	timer_probe();
89}