1 /* linux/arch/arm/plat-s3c/include/plat/clock.h
3 * Copyright (c) 2004-2005 Simtec Electronics
4 * http://www.simtec.co.uk/products/SWLINUX/
5 * Written by Ben Dooks, <ben@simtec.co.uk>
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.
12 #ifndef __ASM_PLAT_CLOCK_H
13 #define __ASM_PLAT_CLOCK_H __FILE__
15 #include <linux/spinlock.h>
16 #include <linux/clkdev.h>
21 * struct clk_ops - standard clock operations
22 * @set_rate: set the clock rate, see clk_set_rate().
23 * @get_rate: get the clock rate, see clk_get_rate().
24 * @round_rate: round a given clock rate, see clk_round_rate().
25 * @set_parent: set the clock's parent, see clk_set_parent().
27 * Group the common clock implementations together so that we
28 * don't have to keep setting the same fields again. We leave
29 * enable in struct clk.
31 * Adding an extra layer of indirection into the process should
32 * not be a problem as it is unlikely these operations are going
33 * to need to be called quickly.
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);
43 struct list_head list;
51 unsigned long ctrlbit;
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 */
61 /* other clocks which may be registered by board support */
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;
69 extern struct clk clk_usb_bus;
71 /* core clock support */
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;
82 /* S3C2443/S3C2416 specific clocks */
83 extern struct clksrc_clk clk_epllref;
84 extern struct clksrc_clk clk_esysclk;
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;
92 extern int clk_default_setrate(struct clk *clk, unsigned long rate);
93 extern struct clk_ops clk_ops_def_setrate;
95 /* exports for arch/arm/mach-s3c2410
97 * Please DO NOT use these outside of arch/arm/mach-s3c2410
100 extern spinlock_t clocks_lock;
102 extern int s3c2410_clkcon_enable(struct clk *clk, int enable);
104 extern int s3c24xx_register_clock(struct clk *clk);
105 extern int s3c24xx_register_clocks(struct clk **clk, int nr_clks);
107 extern void s3c_register_clocks(struct clk *clk, int nr_clks);
108 extern void s3c_disable_clocks(struct clk *clkp, int nr_clks);
110 extern int s3c24xx_register_baseclocks(unsigned long xtal);
112 extern void s5p_register_clocks(unsigned long xtal_freq);
114 extern void s3c24xx_setup_clocks(unsigned long fclk,
118 extern void s3c2410_setup_clocks(void);
119 extern void s3c2412_setup_clocks(void);
120 extern void s3c244x_setup_clocks(void);
122 /* S3C2410 specific clock functions */
124 extern int s3c2410_baseclk_add(void);
126 /* S3C2443/S3C2416 specific clock functions */
128 typedef unsigned int (*pll_fn)(unsigned int reg, unsigned int base);
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,
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);
139 /* S3C64XX specific functions and clocks */
141 extern int s3c64xx_sclk_ctrl(struct clk *clk, int enable);
143 /* Init for pwm clock code */
145 extern void s3c_pwmclk_init(void);
147 /* Global watchdog clock used by arch_wtd_reset() callback */
149 extern struct clk *s3c2410_wdtclk;
151 #endif /* __ASM_PLAT_CLOCK_H */