LXR linux/arch/arm/plat-samsung/include/plat/clock.h

   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, <ben@simtec.co.uk>
   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#include <linux/spinlock.h>
  13
  14struct clk;
  15
  16/**
  17 * struct clk_ops - standard clock operations
  18 * @set_rate: set the clock rate, see clk_set_rate().
  19 * @get_rate: get the clock rate, see clk_get_rate().
  20 * @round_rate: round a given clock rate, see clk_round_rate().
  21 * @set_parent: set the clock's parent, see clk_set_parent().
  22 *
  23 * Group the common clock implementations together so that we
  24 * don't have to keep setting the same fields again. We leave
  25 * enable in struct clk.
  26 *
  27 * Adding an extra layer of indirection into the process should
  28 * not be a problem as it is unlikely these operations are going
  29 * to need to be called quickly.
  30 */
  31struct clk_ops {
  32        int                 (*set_rate)(struct clk *c, unsigned long rate);
  33        unsigned long       (*get_rate)(struct clk *c);
  34        unsigned long       (*round_rate)(struct clk *c, unsigned long rate);
  35        int                 (*set_parent)(struct clk *c, struct clk *parent);
  36};
  37
  38struct clk {
  39        struct list_head      list;
  40        struct module        *owner;
  41        struct clk           *parent;
  42        const char           *name;
  43        int                   id;
  44        int                   usage;
  45        unsigned long         rate;
  46        unsigned long         ctrlbit;
  47
  48        struct clk_ops          *ops;
  49        int                 (*enable)(struct clk *, int enable);
  50#if defined(CONFIG_PM_DEBUG) && defined(CONFIG_DEBUG_FS)
  51        struct dentry           *dent;  /* For visible tree hierarchy */
  52#endif
  53};
  54
  55/* other clocks which may be registered by board support */
  56
  57extern struct clk s3c24xx_dclk0;
  58extern struct clk s3c24xx_dclk1;
  59extern struct clk s3c24xx_clkout0;
  60extern struct clk s3c24xx_clkout1;
  61extern struct clk s3c24xx_uclk;
  62
  63extern struct clk clk_usb_bus;
  64
  65/* core clock support */
  66
  67extern struct clk clk_f;
  68extern struct clk clk_h;
  69extern struct clk clk_p;
  70extern struct clk clk_mpll;
  71extern struct clk clk_upll;
  72extern struct clk clk_epll;
  73extern struct clk clk_xtal;
  74extern struct clk clk_ext;
  75
  76/* S3C64XX specific clocks */
  77extern struct clk clk_h2;
  78extern struct clk clk_27m;
  79extern struct clk clk_48m;
  80extern struct clk clk_xusbxti;
  81
  82extern int clk_default_setrate(struct clk *clk, unsigned long rate);
  83extern struct clk_ops clk_ops_def_setrate;
  84
  85/* exports for arch/arm/mach-s3c2410
  86 *
  87 * Please DO NOT use these outside of arch/arm/mach-s3c2410
  88*/
  89
  90extern spinlock_t clocks_lock;
  91
  92extern int s3c2410_clkcon_enable(struct clk *clk, int enable);
  93
  94extern int s3c24xx_register_clock(struct clk *clk);
  95extern int s3c24xx_register_clocks(struct clk **clk, int nr_clks);
  96
  97extern void s3c_register_clocks(struct clk *clk, int nr_clks);
  98extern void s3c_disable_clocks(struct clk *clkp, int nr_clks);
  99
 100extern int s3c24xx_register_baseclocks(unsigned long xtal);
 101
 102extern void s5p_register_clocks(unsigned long xtal_freq);
 103
 104extern void s3c24xx_setup_clocks(unsigned long fclk,
 105                                 unsigned long hclk,
 106                                 unsigned long pclk);
 107
 108extern void s3c2410_setup_clocks(void);
 109extern void s3c2412_setup_clocks(void);
 110extern void s3c244x_setup_clocks(void);
 111extern void s3c2443_setup_clocks(void);
 112
 113/* S3C64XX specific functions and clocks */
 114
 115extern int s3c64xx_sclk_ctrl(struct clk *clk, int enable);
 116
 117/* Init for pwm clock code */
 118
 119extern void s3c_pwmclk_init(void);
 120
 121