/* linux/arch/arm/plat-s3c/include/plat/clock.h * * Copyright (c) 2004-2005 Simtec Electronics * http://www.simtec.co.uk/products/SWLINUX/ * Written by Ben Dooks, <ben@simtec.co.uk> * * 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 */ #endif }; /* 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; /* S3C2443/S3C2416 specific clocks */ extern struct clksrc_clk clk_epllref; extern struct clksrc_clk clk_esysclk; /* 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); /* S3C2410 specific clock functions */ extern int s3c2410_baseclk_add(void); /* S3C2443/S3C2416 specific clock functions */ typedef unsigned int (*pll_fn)(unsigned int reg, unsigned int base); extern void s3c2443_common_setup_clocks(pll_fn get_mpll); extern void s3c2443_common_init_clocks(int xtal, pll_fn get_mpll, unsigned int *divs, int nr_divs, int divmask); extern int s3c2443_clkcon_enable_h(struct clk *clk, int enable); extern int s3c2443_clkcon_enable_p(struct clk *clk, int enable); extern int s3c2443_clkcon_enable_s(struct clk *clk, int enable); /* 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 */