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 /* S3C24XX UART clocks */
87 extern struct clk s3c24xx_clk_uart0
;
88 extern struct clk s3c24xx_clk_uart1
;
89 extern struct clk s3c24xx_clk_uart2
;
91 /* S3C64XX specific clocks */
92 extern struct clk clk_h2
;
93 extern struct clk clk_27m
;
94 extern struct clk clk_48m
;
95 extern struct clk clk_xusbxti
;
97 extern int clk_default_setrate(struct clk
*clk
, unsigned long rate
);
98 extern struct clk_ops clk_ops_def_setrate
;
100 /* exports for arch/arm/mach-s3c2410
102 * Please DO NOT use these outside of arch/arm/mach-s3c2410
105 extern spinlock_t clocks_lock
;
107 extern int s3c2410_clkcon_enable(struct clk
*clk
, int enable
);
109 extern int s3c24xx_register_clock(struct clk
*clk
);
110 extern int s3c24xx_register_clocks(struct clk
**clk
, int nr_clks
);
112 extern void s3c_register_clocks(struct clk
*clk
, int nr_clks
);
113 extern void s3c_disable_clocks(struct clk
*clkp
, int nr_clks
);
115 extern int s3c24xx_register_baseclocks(unsigned long xtal
);
117 extern void s5p_register_clocks(unsigned long xtal_freq
);
119 extern void s3c24xx_setup_clocks(unsigned long fclk
,
123 extern void s3c2410_setup_clocks(void);
124 extern void s3c2412_setup_clocks(void);
125 extern void s3c244x_setup_clocks(void);
127 /* S3C2410 specific clock functions */
129 extern int s3c2410_baseclk_add(void);
131 /* S3C2443/S3C2416 specific clock functions */
133 typedef unsigned int (*pll_fn
)(unsigned int reg
, unsigned int base
);
135 extern void s3c2443_common_setup_clocks(pll_fn get_mpll
);
136 extern void s3c2443_common_init_clocks(int xtal
, pll_fn get_mpll
,
137 unsigned int *divs
, int nr_divs
,
140 extern int s3c2443_clkcon_enable_h(struct clk
*clk
, int enable
);
141 extern int s3c2443_clkcon_enable_p(struct clk
*clk
, int enable
);
142 extern int s3c2443_clkcon_enable_s(struct clk
*clk
, int enable
);
144 /* S3C64XX specific functions and clocks */
146 extern int s3c64xx_sclk_ctrl(struct clk
*clk
, int enable
);
148 /* Init for pwm clock code */
150 extern void s3c_pwmclk_init(void);
152 /* Global watchdog clock used by arch_wtd_reset() callback */
154 extern struct clk
*s3c2410_wdtclk
;
156 #endif /* __ASM_PLAT_CLOCK_H */