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Kukjin Kim2bc02c02011-08-24 17:25:09 +09001/*
2 * linux/arch/arm/mach-exynos4/clock-exynos4212.c
3 *
4 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com
6 *
7 * EXYNOS4212 - Clock support
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12*/
13
14#include <linux/kernel.h>
15#include <linux/err.h>
16#include <linux/clk.h>
17#include <linux/io.h>
Jonghwan Choiacd35612011-08-24 21:52:45 +090018#include <linux/syscore_ops.h>
Kukjin Kim2bc02c02011-08-24 17:25:09 +090019
20#include <plat/cpu-freq.h>
21#include <plat/clock.h>
22#include <plat/cpu.h>
23#include <plat/pll.h>
24#include <plat/s5p-clock.h>
25#include <plat/clock-clksrc.h>
26#include <plat/exynos4.h>
Jonghwan Choiacd35612011-08-24 21:52:45 +090027#include <plat/pm.h>
Kukjin Kim2bc02c02011-08-24 17:25:09 +090028
29#include <mach/hardware.h>
30#include <mach/map.h>
31#include <mach/regs-clock.h>
32#include <mach/exynos4-clock.h>
33
Jonghwan Choiacd35612011-08-24 21:52:45 +090034static struct sleep_save exynos4212_clock_save[] = {
35 SAVE_ITEM(S5P_CLKSRC_IMAGE),
36 SAVE_ITEM(S5P_CLKDIV_IMAGE),
37 SAVE_ITEM(S5P_CLKGATE_IP_IMAGE_4212),
38 SAVE_ITEM(S5P_CLKGATE_IP_PERIR_4212),
39};
40
Kukjin Kim2bc02c02011-08-24 17:25:09 +090041static struct clk *clk_src_mpll_user_list[] = {
42 [0] = &clk_fin_mpll,
43 [1] = &clk_mout_mpll.clk,
44};
45
46static struct clksrc_sources clk_src_mpll_user = {
47 .sources = clk_src_mpll_user_list,
48 .nr_sources = ARRAY_SIZE(clk_src_mpll_user_list),
49};
50
51static struct clksrc_clk clk_mout_mpll_user = {
52 .clk = {
53 .name = "mout_mpll_user",
54 },
55 .sources = &clk_src_mpll_user,
56 .reg_src = { .reg = S5P_CLKSRC_CPU, .shift = 24, .size = 1 },
57};
58
59static struct clksrc_clk *sysclks[] = {
60 &clk_mout_mpll_user,
61};
62
63static struct clksrc_clk clksrcs[] = {
64 /* nothing here yet */
65};
66
67static struct clk init_clocks_off[] = {
68 /* nothing here yet */
69};
70
Jonghwan Choiacd35612011-08-24 21:52:45 +090071#ifdef CONFIG_PM_SLEEP
72static int exynos4212_clock_suspend(void)
73{
74 s3c_pm_do_save(exynos4212_clock_save, ARRAY_SIZE(exynos4212_clock_save));
75
76 return 0;
77}
78
79static void exynos4212_clock_resume(void)
80{
81 s3c_pm_do_restore_core(exynos4212_clock_save, ARRAY_SIZE(exynos4212_clock_save));
82}
83
84#else
85#define exynos4212_clock_suspend NULL
86#define exynos4212_clock_resume NULL
87#endif
88
89struct syscore_ops exynos4212_clock_syscore_ops = {
90 .suspend = exynos4212_clock_suspend,
91 .resume = exynos4212_clock_resume,
92};
93
Kukjin Kim2bc02c02011-08-24 17:25:09 +090094void __init exynos4212_register_clocks(void)
95{
96 int ptr;
97
98 /* usbphy1 is removed */
99 clkset_group_list[4] = NULL;
100
101 /* mout_mpll_user is used */
102 clkset_group_list[6] = &clk_mout_mpll_user.clk;
103 clkset_aclk_top_list[0] = &clk_mout_mpll_user.clk;
104
105 clk_mout_mpll.reg_src.reg = S5P_CLKSRC_DMC;
106 clk_mout_mpll.reg_src.shift = 12;
107 clk_mout_mpll.reg_src.size = 1;
108
109 for (ptr = 0; ptr < ARRAY_SIZE(sysclks); ptr++)
110 s3c_register_clksrc(sysclks[ptr], 1);
111
112 s3c_register_clksrc(clksrcs, ARRAY_SIZE(clksrcs));
113
114 s3c_register_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off));
115 s3c_disable_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off));
Jonghwan Choiacd35612011-08-24 21:52:45 +0900116
117 register_syscore_ops(&exynos4212_clock_syscore_ops);
Kukjin Kim2bc02c02011-08-24 17:25:09 +0900118}