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clock.h
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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, <[email protected]>
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 #ifndef __ASM_PLAT_CLOCK_H
13 #define __ASM_PLAT_CLOCK_H __FILE__
14 
15 #include <linux/spinlock.h>
16 #include <linux/clkdev.h>
17 
18 struct clk;
19 
35 struct clk_ops {
36  int (*set_rate)(struct clk *c, unsigned long rate);
37  unsigned long (*get_rate)(struct clk *c);
38  unsigned long (*round_rate)(struct clk *c, unsigned long rate);
39  int (*set_parent)(struct clk *c, struct clk *parent);
40 };
41 
42 struct clk {
43  struct list_head list;
44  struct module *owner;
45  struct clk *parent;
46  const char *name;
47  const char *devname;
48  int id;
49  int usage;
50  unsigned long rate;
51  unsigned long ctrlbit;
52 
53  struct clk_ops *ops;
54  int (*enable)(struct clk *, int enable);
55  struct clk_lookup lookup;
56 #if defined(CONFIG_PM_DEBUG) && defined(CONFIG_DEBUG_FS)
57  struct dentry *dent; /* For visible tree hierarchy */
58 #endif
59 };
60 
61 /* other clocks which may be registered by board support */
62 
63 extern struct clk s3c24xx_dclk0;
64 extern struct clk s3c24xx_dclk1;
65 extern struct clk s3c24xx_clkout0;
66 extern struct clk s3c24xx_clkout1;
67 extern struct clk s3c24xx_uclk;
68 
69 extern struct clk clk_usb_bus;
70 
71 /* core clock support */
72 
73 extern struct clk clk_f;
74 extern struct clk clk_h;
75 extern struct clk clk_p;
76 extern struct clk clk_mpll;
77 extern struct clk clk_upll;
78 extern struct clk clk_epll;
79 extern struct clk clk_xtal;
80 extern struct clk clk_ext;
81 
82 /* S3C2443/S3C2416 specific clocks */
83 extern struct clksrc_clk clk_epllref;
84 extern struct clksrc_clk clk_esysclk;
85 
86 /* S3C64XX specific clocks */
87 extern struct clk clk_h2;
88 extern struct clk clk_27m;
89 extern struct clk clk_48m;
90 extern struct clk clk_xusbxti;
91 
92 extern int clk_default_setrate(struct clk *clk, unsigned long rate);
93 extern struct clk_ops clk_ops_def_setrate;
94 
95 /* exports for arch/arm/mach-s3c2410
96  *
97  * Please DO NOT use these outside of arch/arm/mach-s3c2410
98 */
99 
100 extern spinlock_t clocks_lock;
101 
102 extern int s3c2410_clkcon_enable(struct clk *clk, int enable);
103 
104 extern int s3c24xx_register_clock(struct clk *clk);
105 extern int s3c24xx_register_clocks(struct clk **clk, int nr_clks);
106 
107 extern void s3c_register_clocks(struct clk *clk, int nr_clks);
108 extern void s3c_disable_clocks(struct clk *clkp, int nr_clks);
109 
110 extern int s3c24xx_register_baseclocks(unsigned long xtal);
111 
112 extern void s5p_register_clocks(unsigned long xtal_freq);
113 
114 extern void s3c24xx_setup_clocks(unsigned long fclk,
115  unsigned long hclk,
116  unsigned long pclk);
117 
118 extern void s3c2410_setup_clocks(void);
119 extern void s3c2412_setup_clocks(void);
120 extern void s3c244x_setup_clocks(void);
121 
122 /* S3C2410 specific clock functions */
123 
124 extern int s3c2410_baseclk_add(void);
125 
126 /* S3C2443/S3C2416 specific clock functions */
127 
128 typedef unsigned int (*pll_fn)(unsigned int reg, unsigned int base);
129 
130 extern void s3c2443_common_setup_clocks(pll_fn get_mpll);
131 extern void s3c2443_common_init_clocks(int xtal, pll_fn get_mpll,
132  unsigned int *divs, int nr_divs,
133  int divmask);
134 
135 extern int s3c2443_clkcon_enable_h(struct clk *clk, int enable);
136 extern int s3c2443_clkcon_enable_p(struct clk *clk, int enable);
137 extern int s3c2443_clkcon_enable_s(struct clk *clk, int enable);
138 
139 /* S3C64XX specific functions and clocks */
140 
141 extern int s3c64xx_sclk_ctrl(struct clk *clk, int enable);
142 
143 /* Init for pwm clock code */
144 
145 extern void s3c_pwmclk_init(void);
146 
147 /* Global watchdog clock used by arch_wtd_reset() callback */
148 
149 extern struct clk *s3c2410_wdtclk;
150 
151 #endif /* __ASM_PLAT_CLOCK_H */
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