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8d6f8658 BD |
1 | /* linux/arch/arm/mach-s3c2416/clock.c |
2 | * | |
3 | * Copyright (c) 2010 Simtec Electronics | |
4 | * Copyright (c) 2010 Ben Dooks <ben-linux@fluff.org> | |
5 | * | |
6 | * S3C2416 Clock control support | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | */ | |
13 | ||
14 | #include <linux/init.h> | |
15 | #include <linux/clk.h> | |
16 | ||
17 | #include <plat/s3c2416.h> | |
8d6f8658 BD |
18 | #include <plat/clock.h> |
19 | #include <plat/clock-clksrc.h> | |
20 | #include <plat/cpu.h> | |
21 | ||
22 | #include <plat/cpu-freq.h> | |
8d6f8658 BD |
23 | #include <plat/pll.h> |
24 | ||
25 | #include <asm/mach/map.h> | |
26 | ||
27 | #include <mach/regs-clock.h> | |
28 | #include <mach/regs-s3c2443-clock.h> | |
29 | ||
efb1fb48 HS |
30 | /* armdiv |
31 | * | |
32 | * this clock is sourced from msysclk and can have a number of | |
33 | * divider values applied to it to then be fed into armclk. | |
34 | * The real clock definition is done in s3c2443-clock.c, | |
35 | * only the armdiv divisor table must be defined here. | |
36 | */ | |
37 | ||
8d6f8658 BD |
38 | static unsigned int armdiv[8] = { |
39 | [0] = 1, | |
40 | [1] = 2, | |
41 | [2] = 3, | |
42 | [3] = 4, | |
43 | [5] = 6, | |
44 | [7] = 8, | |
45 | }; | |
46 | ||
4a43c666 HS |
47 | static struct clksrc_clk hsspi_eplldiv = { |
48 | .clk = { | |
49 | .name = "hsspi-eplldiv", | |
50 | .parent = &clk_esysclk.clk, | |
51 | .ctrlbit = (1 << 14), | |
52 | .enable = s3c2443_clkcon_enable_s, | |
53 | }, | |
54 | .reg_div = { .reg = S3C2443_CLKDIV1, .size = 2, .shift = 24 }, | |
55 | }; | |
56 | ||
57 | static struct clk *hsspi_sources[] = { | |
58 | [0] = &hsspi_eplldiv.clk, | |
59 | [1] = NULL, /* to fix */ | |
60 | }; | |
61 | ||
62 | static struct clksrc_clk hsspi_mux = { | |
63 | .clk = { | |
64 | .name = "hsspi-if", | |
65 | }, | |
66 | .sources = &(struct clksrc_sources) { | |
67 | .sources = hsspi_sources, | |
68 | .nr_sources = ARRAY_SIZE(hsspi_sources), | |
69 | }, | |
70 | .reg_src = { .reg = S3C2443_CLKSRC, .size = 1, .shift = 18 }, | |
71 | }; | |
72 | ||
8d6f8658 BD |
73 | static struct clksrc_clk hsmmc_div[] = { |
74 | [0] = { | |
75 | .clk = { | |
76 | .name = "hsmmc-div", | |
e83626f2 | 77 | .devname = "s3c-sdhci.0", |
8d6f8658 BD |
78 | .parent = &clk_esysclk.clk, |
79 | }, | |
80 | .reg_div = { .reg = S3C2416_CLKDIV2, .size = 2, .shift = 6 }, | |
81 | }, | |
82 | [1] = { | |
83 | .clk = { | |
84 | .name = "hsmmc-div", | |
e83626f2 | 85 | .devname = "s3c-sdhci.1", |
8d6f8658 BD |
86 | .parent = &clk_esysclk.clk, |
87 | }, | |
88 | .reg_div = { .reg = S3C2443_CLKDIV1, .size = 2, .shift = 6 }, | |
89 | }, | |
90 | }; | |
91 | ||
a361d10a RS |
92 | static struct clksrc_clk hsmmc_mux0 = { |
93 | .clk = { | |
94 | .name = "hsmmc-if", | |
95 | .devname = "s3c-sdhci.0", | |
96 | .ctrlbit = (1 << 6), | |
97 | .enable = s3c2443_clkcon_enable_s, | |
8d6f8658 | 98 | }, |
a361d10a RS |
99 | .sources = &(struct clksrc_sources) { |
100 | .nr_sources = 2, | |
101 | .sources = (struct clk * []) { | |
102 | [0] = &hsmmc_div[0].clk, | |
103 | [1] = NULL, /* to fix */ | |
8d6f8658 | 104 | }, |
a361d10a RS |
105 | }, |
106 | .reg_src = { .reg = S3C2443_CLKSRC, .size = 1, .shift = 16 }, | |
107 | }; | |
108 | ||
109 | static struct clksrc_clk hsmmc_mux1 = { | |
110 | .clk = { | |
111 | .name = "hsmmc-if", | |
112 | .devname = "s3c-sdhci.1", | |
113 | .ctrlbit = (1 << 12), | |
114 | .enable = s3c2443_clkcon_enable_s, | |
115 | }, | |
116 | .sources = &(struct clksrc_sources) { | |
117 | .nr_sources = 2, | |
118 | .sources = (struct clk * []) { | |
119 | [0] = &hsmmc_div[1].clk, | |
120 | [1] = NULL, /* to fix */ | |
8d6f8658 | 121 | }, |
8d6f8658 | 122 | }, |
a361d10a | 123 | .reg_src = { .reg = S3C2443_CLKSRC, .size = 1, .shift = 17 }, |
8d6f8658 BD |
124 | }; |
125 | ||
95d6791b YK |
126 | static struct clk hsmmc0_clk = { |
127 | .name = "hsmmc", | |
e83626f2 | 128 | .devname = "s3c-sdhci.0", |
95d6791b YK |
129 | .parent = &clk_h, |
130 | .enable = s3c2443_clkcon_enable_h, | |
131 | .ctrlbit = S3C2416_HCLKCON_HSMMC0, | |
132 | }; | |
8d6f8658 | 133 | |
8d6f8658 | 134 | static struct clksrc_clk *clksrcs[] __initdata = { |
4a43c666 HS |
135 | &hsspi_eplldiv, |
136 | &hsspi_mux, | |
8d6f8658 BD |
137 | &hsmmc_div[0], |
138 | &hsmmc_div[1], | |
a361d10a RS |
139 | &hsmmc_mux0, |
140 | &hsmmc_mux1, | |
141 | }; | |
142 | ||
143 | static struct clk_lookup s3c2416_clk_lookup[] = { | |
144 | CLKDEV_INIT("s3c-sdhci.0", "mmc_busclk.0", &hsmmc0_clk), | |
145 | CLKDEV_INIT("s3c-sdhci.0", "mmc_busclk.2", &hsmmc_mux0.clk), | |
146 | CLKDEV_INIT("s3c-sdhci.1", "mmc_busclk.2", &hsmmc_mux1.clk), | |
a5238e36 TA |
147 | /* s3c2443-spi.0 is used on s3c2416 and s3c2450 as well */ |
148 | CLKDEV_INIT("s3c2443-spi.0", "spi_busclk2", &hsspi_mux.clk), | |
8d6f8658 BD |
149 | }; |
150 | ||
151 | void __init s3c2416_init_clocks(int xtal) | |
152 | { | |
153 | u32 epllcon = __raw_readl(S3C2443_EPLLCON); | |
154 | u32 epllcon1 = __raw_readl(S3C2443_EPLLCON+4); | |
155 | int ptr; | |
156 | ||
157 | /* s3c2416 EPLL compatible with s3c64xx */ | |
158 | clk_epll.rate = s3c_get_pll6553x(xtal, epllcon, epllcon1); | |
159 | ||
160 | clk_epll.parent = &clk_epllref.clk; | |
161 | ||
33ccedfd | 162 | s3c2443_common_init_clocks(xtal, s3c2416_get_pll, |
d9a3bfbd HS |
163 | armdiv, ARRAY_SIZE(armdiv), |
164 | S3C2416_CLKDIV0_ARMDIV_MASK); | |
8d6f8658 BD |
165 | |
166 | for (ptr = 0; ptr < ARRAY_SIZE(clksrcs); ptr++) | |
167 | s3c_register_clksrc(clksrcs[ptr], 1); | |
168 | ||
95d6791b | 169 | s3c24xx_register_clock(&hsmmc0_clk); |
a361d10a | 170 | clkdev_add_table(s3c2416_clk_lookup, ARRAY_SIZE(s3c2416_clk_lookup)); |
95d6791b | 171 | |
8d6f8658 BD |
172 | s3c_pwmclk_init(); |
173 | ||
174 | } |