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