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/* linux/arch/arm/plat-s3c/include/plat/clock.h
* Copyright (c) 2004-2005 Simtec Electronics
* Written by Ben Dooks, <>
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
#ifndef __ASM_PLAT_CLOCK_H
#define __ASM_PLAT_CLOCK_H __FILE__
#include <linux/spinlock.h>
#include <linux/clkdev.h>
struct clk;
* struct clk_ops - standard clock operations
* @set_rate: set the clock rate, see clk_set_rate().
* @get_rate: get the clock rate, see clk_get_rate().
* @round_rate: round a given clock rate, see clk_round_rate().
* @set_parent: set the clock's parent, see clk_set_parent().
* Group the common clock implementations together so that we
* don't have to keep setting the same fields again. We leave
* enable in struct clk.
* Adding an extra layer of indirection into the process should
* not be a problem as it is unlikely these operations are going
* to need to be called quickly.
struct clk_ops {
int (*set_rate)(struct clk *c, unsigned long rate);
unsigned long (*get_rate)(struct clk *c);
unsigned long (*round_rate)(struct clk *c, unsigned long rate);
int (*set_parent)(struct clk *c, struct clk *parent);
struct clk {
struct list_head list;
struct module *owner;
struct clk *parent;
const char *name;
const char *devname;
int id;
int usage;
unsigned long rate;
unsigned long ctrlbit;
struct clk_ops *ops;
int (*enable)(struct clk *, int enable);
struct clk_lookup lookup;
#if defined(CONFIG_PM_DEBUG) && defined(CONFIG_DEBUG_FS)
struct dentry *dent; /* For visible tree hierarchy */
/* other clocks which may be registered by board support */
extern struct clk s3c24xx_dclk0;
extern struct clk s3c24xx_dclk1;
extern struct clk s3c24xx_clkout0;
extern struct clk s3c24xx_clkout1;
extern struct clk s3c24xx_uclk;
extern struct clk clk_usb_bus;
/* core clock support */
extern struct clk clk_f;
extern struct clk clk_h;
extern struct clk clk_p;
extern struct clk clk_mpll;
extern struct clk clk_upll;
extern struct clk clk_epll;
extern struct clk clk_xtal;
extern struct clk clk_ext;
/* S3C64XX specific clocks */
extern struct clk clk_h2;
extern struct clk clk_27m;
extern struct clk clk_48m;
extern struct clk clk_xusbxti;
extern int clk_default_setrate(struct clk *clk, unsigned long rate);
extern struct clk_ops clk_ops_def_setrate;
/* exports for arch/arm/mach-s3c2410
* Please DO NOT use these outside of arch/arm/mach-s3c2410
extern spinlock_t clocks_lock;
extern int s3c2410_clkcon_enable(struct clk *clk, int enable);
extern int s3c24xx_register_clock(struct clk *clk);
extern int s3c24xx_register_clocks(struct clk **clk, int nr_clks);
extern void s3c_register_clocks(struct clk *clk, int nr_clks);
extern void s3c_disable_clocks(struct clk *clkp, int nr_clks);
extern int s3c24xx_register_baseclocks(unsigned long xtal);
extern void s5p_register_clocks(unsigned long xtal_freq);
extern void s3c24xx_setup_clocks(unsigned long fclk,
unsigned long hclk,
unsigned long pclk);
extern void s3c2410_setup_clocks(void);
extern void s3c2412_setup_clocks(void);
extern void s3c244x_setup_clocks(void);
extern void s3c2443_setup_clocks(void);
/* S3C64XX specific functions and clocks */
extern int s3c64xx_sclk_ctrl(struct clk *clk, int enable);
/* Init for pwm clock code */
extern void s3c_pwmclk_init(void);
/* Global watchdog clock used by arch_wtd_reset() callback */
extern struct clk *s3c2410_wdtclk;
#endif /* __ASM_PLAT_CLOCK_H */