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1 | /* linux/arch/arm/plat-s3c/include/plat/clock.h | |
2 | * | |
3 | * Copyright (c) 2004-2005 Simtec Electronics | |
4 | * http://www.simtec.co.uk/products/SWLINUX/ | |
5 | * Written by Ben Dooks, <ben@simtec.co.uk> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
12 | #include <linux/spinlock.h> | |
13 | ||
14 | struct clk; | |
15 | ||
16 | /** | |
17 | * struct clk_ops - standard clock operations | |
18 | * @set_rate: set the clock rate, see clk_set_rate(). | |
19 | * @get_rate: get the clock rate, see clk_get_rate(). | |
20 | * @round_rate: round a given clock rate, see clk_round_rate(). | |
21 | * @set_parent: set the clock's parent, see clk_set_parent(). | |
22 | * | |
23 | * Group the common clock implementations together so that we | |
24 | * don't have to keep setting the same fields again. We leave | |
25 | * enable in struct clk. | |
26 | * | |
27 | * Adding an extra layer of indirection into the process should | |
28 | * not be a problem as it is unlikely these operations are going | |
29 | * to need to be called quickly. | |
30 | */ | |
31 | struct clk_ops { | |
32 | int (*set_rate)(struct clk *c, unsigned long rate); | |
33 | unsigned long (*get_rate)(struct clk *c); | |
34 | unsigned long (*round_rate)(struct clk *c, unsigned long rate); | |
35 | int (*set_parent)(struct clk *c, struct clk *parent); | |
36 | }; | |
37 | ||
38 | struct clk { | |
39 | struct list_head list; | |
40 | struct module *owner; | |
41 | struct clk *parent; | |
42 | const char *name; | |
43 | int id; | |
44 | int usage; | |
45 | unsigned long rate; | |
46 | unsigned long ctrlbit; | |
47 | ||
48 | struct clk_ops *ops; | |
49 | int (*enable)(struct clk *, int enable); | |
50 | #if defined(CONFIG_PM_DEBUG) && defined(CONFIG_DEBUG_FS) | |
51 | struct dentry *dent; /* For visible tree hierarchy */ | |
52 | #endif | |
53 | }; | |
54 | ||
55 | /* other clocks which may be registered by board support */ | |
56 | ||
57 | extern struct clk s3c24xx_dclk0; | |
58 | extern struct clk s3c24xx_dclk1; | |
59 | extern struct clk s3c24xx_clkout0; | |
60 | extern struct clk s3c24xx_clkout1; | |
61 | extern struct clk s3c24xx_uclk; | |
62 | ||
63 | extern struct clk clk_usb_bus; | |
64 | ||
65 | /* core clock support */ | |
66 | ||
67 | extern struct clk clk_f; | |
68 | extern struct clk clk_h; | |
69 | extern struct clk clk_p; | |
70 | extern struct clk clk_mpll; | |
71 | extern struct clk clk_upll; | |
72 | extern struct clk clk_epll; | |
73 | extern struct clk clk_xtal; | |
74 | extern struct clk clk_ext; | |
75 | ||
76 | /* S3C64XX specific clocks */ | |
77 | extern struct clk clk_h2; | |
78 | extern struct clk clk_27m; | |
79 | extern struct clk clk_48m; | |
80 | extern struct clk clk_xusbxti; | |
81 | ||
82 | extern int clk_default_setrate(struct clk *clk, unsigned long rate); | |
83 | extern struct clk_ops clk_ops_def_setrate; | |
84 | ||
85 | /* exports for arch/arm/mach-s3c2410 | |
86 | * | |
87 | * Please DO NOT use these outside of arch/arm/mach-s3c2410 | |
88 | */ | |
89 | ||
90 | extern spinlock_t clocks_lock; | |
91 | ||
92 | extern int s3c2410_clkcon_enable(struct clk *clk, int enable); | |
93 | ||
94 | extern int s3c24xx_register_clock(struct clk *clk); | |
95 | extern int s3c24xx_register_clocks(struct clk **clk, int nr_clks); | |
96 | ||
97 | extern void s3c_register_clocks(struct clk *clk, int nr_clks); | |
98 | extern void s3c_disable_clocks(struct clk *clkp, int nr_clks); | |
99 | ||
100 | extern int s3c24xx_register_baseclocks(unsigned long xtal); | |
101 | ||
102 | extern void s5p_register_clocks(unsigned long xtal_freq); | |
103 | ||
104 | extern void s3c24xx_setup_clocks(unsigned long fclk, | |
105 | unsigned long hclk, | |
106 | unsigned long pclk); | |
107 | ||
108 | extern void s3c2410_setup_clocks(void); | |
109 | extern void s3c2412_setup_clocks(void); | |
110 | extern void s3c244x_setup_clocks(void); | |
111 | extern void s3c2443_setup_clocks(void); | |
112 | ||
113 | /* S3C64XX specific functions and clocks */ | |
114 | ||
115 | extern int s3c64xx_sclk_ctrl(struct clk *clk, int enable); | |
116 | ||
117 | /* Init for pwm clock code */ | |
118 | ||
119 | extern void s3c_pwmclk_init(void); | |
120 |