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8997de30 | 1 | /* arch/arm/mach-s3c2440/s3c2440-pll-12000000.c |
78278d6a | 2 | * |
e02f8664 | 3 | * Copyright (c) 2006-2007 Simtec Electronics |
78278d6a BD |
4 | * http://armlinux.simtec.co.uk/ |
5 | * Ben Dooks <ben@simtec.co.uk> | |
6 | * Vincent Sanders <vince@arm.linux.org.uk> | |
7 | * | |
8 | * S3C2440/S3C2442 CPU PLL tables (12MHz Crystal) | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. | |
13 | */ | |
14 | ||
15 | #include <linux/types.h> | |
16 | #include <linux/kernel.h> | |
4a858cfc | 17 | #include <linux/device.h> |
78278d6a BD |
18 | #include <linux/clk.h> |
19 | #include <linux/err.h> | |
20 | ||
21 | #include <plat/cpu.h> | |
22 | #include <plat/cpu-freq-core.h> | |
23 | ||
24 | static struct cpufreq_frequency_table s3c2440_plls_12[] __initdata = { | |
25 | { .frequency = 75000000, .index = PLLVAL(0x75, 3, 3), }, /* FVco 600.000000 */ | |
26 | { .frequency = 80000000, .index = PLLVAL(0x98, 4, 3), }, /* FVco 640.000000 */ | |
27 | { .frequency = 90000000, .index = PLLVAL(0x70, 2, 3), }, /* FVco 720.000000 */ | |
28 | { .frequency = 100000000, .index = PLLVAL(0x5c, 1, 3), }, /* FVco 800.000000 */ | |
29 | { .frequency = 110000000, .index = PLLVAL(0x66, 1, 3), }, /* FVco 880.000000 */ | |
30 | { .frequency = 120000000, .index = PLLVAL(0x70, 1, 3), }, /* FVco 960.000000 */ | |
31 | { .frequency = 150000000, .index = PLLVAL(0x75, 3, 2), }, /* FVco 600.000000 */ | |
32 | { .frequency = 160000000, .index = PLLVAL(0x98, 4, 2), }, /* FVco 640.000000 */ | |
33 | { .frequency = 170000000, .index = PLLVAL(0x4d, 1, 2), }, /* FVco 680.000000 */ | |
34 | { .frequency = 180000000, .index = PLLVAL(0x70, 2, 2), }, /* FVco 720.000000 */ | |
35 | { .frequency = 190000000, .index = PLLVAL(0x57, 1, 2), }, /* FVco 760.000000 */ | |
36 | { .frequency = 200000000, .index = PLLVAL(0x5c, 1, 2), }, /* FVco 800.000000 */ | |
37 | { .frequency = 210000000, .index = PLLVAL(0x84, 2, 2), }, /* FVco 840.000000 */ | |
38 | { .frequency = 220000000, .index = PLLVAL(0x66, 1, 2), }, /* FVco 880.000000 */ | |
39 | { .frequency = 230000000, .index = PLLVAL(0x6b, 1, 2), }, /* FVco 920.000000 */ | |
40 | { .frequency = 240000000, .index = PLLVAL(0x70, 1, 2), }, /* FVco 960.000000 */ | |
41 | { .frequency = 300000000, .index = PLLVAL(0x75, 3, 1), }, /* FVco 600.000000 */ | |
42 | { .frequency = 310000000, .index = PLLVAL(0x93, 4, 1), }, /* FVco 620.000000 */ | |
43 | { .frequency = 320000000, .index = PLLVAL(0x98, 4, 1), }, /* FVco 640.000000 */ | |
44 | { .frequency = 330000000, .index = PLLVAL(0x66, 2, 1), }, /* FVco 660.000000 */ | |
45 | { .frequency = 340000000, .index = PLLVAL(0x4d, 1, 1), }, /* FVco 680.000000 */ | |
46 | { .frequency = 350000000, .index = PLLVAL(0xa7, 4, 1), }, /* FVco 700.000000 */ | |
47 | { .frequency = 360000000, .index = PLLVAL(0x70, 2, 1), }, /* FVco 720.000000 */ | |
48 | { .frequency = 370000000, .index = PLLVAL(0xb1, 4, 1), }, /* FVco 740.000000 */ | |
49 | { .frequency = 380000000, .index = PLLVAL(0x57, 1, 1), }, /* FVco 760.000000 */ | |
50 | { .frequency = 390000000, .index = PLLVAL(0x7a, 2, 1), }, /* FVco 780.000000 */ | |
51 | { .frequency = 400000000, .index = PLLVAL(0x5c, 1, 1), }, /* FVco 800.000000 */ | |
52 | }; | |
53 | ||
04511a6f | 54 | static int s3c2440_plls12_add(struct device *dev, struct subsys_interface *sif) |
78278d6a BD |
55 | { |
56 | struct clk *xtal_clk; | |
57 | unsigned long xtal; | |
58 | ||
59 | xtal_clk = clk_get(NULL, "xtal"); | |
60 | if (IS_ERR(xtal_clk)) | |
61 | return PTR_ERR(xtal_clk); | |
62 | ||
63 | xtal = clk_get_rate(xtal_clk); | |
64 | clk_put(xtal_clk); | |
65 | ||
66 | if (xtal == 12000000) { | |
67 | printk(KERN_INFO "Using PLL table for 12MHz crystal\n"); | |
68 | return s3c_plltab_register(s3c2440_plls_12, | |
69 | ARRAY_SIZE(s3c2440_plls_12)); | |
70 | } | |
71 | ||
72 | return 0; | |
73 | } | |
74 | ||
4a858cfc KS |
75 | static struct subsys_interface s3c2440_plls12_interface = { |
76 | .name = "s3c2440_plls12", | |
77 | .subsys = &s3c2440_subsys, | |
78 | .add_dev = s3c2440_plls12_add, | |
78278d6a BD |
79 | }; |
80 | ||
81 | static int __init s3c2440_pll_12mhz(void) | |
82 | { | |
4a858cfc | 83 | return subsys_interface_register(&s3c2440_plls12_interface); |
78278d6a BD |
84 | |
85 | } | |
86 | ||
87 | arch_initcall(s3c2440_pll_12mhz); | |
88 | ||
4a858cfc KS |
89 | static struct subsys_interface s3c2442_plls12_interface = { |
90 | .name = "s3c2442_plls12", | |
91 | .subsys = &s3c2442_subsys, | |
92 | .add_dev = s3c2440_plls12_add, | |
78278d6a BD |
93 | }; |
94 | ||
95 | static int __init s3c2442_pll_12mhz(void) | |
96 | { | |
4a858cfc | 97 | return subsys_interface_register(&s3c2442_plls12_interface); |
78278d6a BD |
98 | |
99 | } | |
100 | ||
101 | arch_initcall(s3c2442_pll_12mhz); |