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
  14 struct 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  */
  31 struct 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
  38 struct 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
  57 extern struct clk s3c24xx_dclk0;
  58 extern struct clk s3c24xx_dclk1;
  59 extern struct clk s3c24xx_clkout0;
  60 extern struct clk s3c24xx_clkout1;
  61 extern struct clk s3c24xx_uclk;
  62
  63 extern struct clk clk_usb_bus;
  64
  65 /* core clock support */
  66
  67 extern struct clk clk_f;
  68 extern struct clk clk_h;
  69 extern struct clk clk_p;
  70 extern struct clk clk_mpll;
  71 extern struct clk clk_upll;
  72 extern struct clk clk_epll;
  73 extern struct clk clk_xtal;
  74 extern struct clk clk_ext;
  75
  76 /* S3C64XX specific clocks */
  77 extern struct clk clk_h2;
  78 extern struct clk clk_27m;
  79 extern struct clk clk_48m;
  80 extern struct clk clk_xusbxti;
  81
  82 extern int clk_default_setrate(struct clk *clk, unsigned long rate);
  83 extern 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
  90 extern spinlock_t clocks_lock;
  91
  92 extern int s3c2410_clkcon_enable(struct clk *clk, int enable);
  93
  94 extern int s3c24xx_register_clock(struct clk *clk);
  95 extern int s3c24xx_register_clocks(struct clk **clk, int nr_clks);
  96
  97 extern void s3c_register_clocks(struct clk *clk, int nr_clks);
  98 extern void s3c_disable_clocks(struct clk *clkp, int nr_clks);
  99
 100 extern int s3c24xx_register_baseclocks(unsigned long xtal);
 101
 102 extern void s5p_register_clocks(unsigned long xtal_freq);
 103
 104 extern void s3c24xx_setup_clocks(unsigned long fclk,
 105                                  unsigned long hclk,
 106                                  unsigned long pclk);
 107
 108 extern void s3c2410_setup_clocks(void);
 109 extern void s3c2412_setup_clocks(void);
 110 extern void s3c244x_setup_clocks(void);
 111 extern void s3c2443_setup_clocks(void);
 112
 113 /* S3C64XX specific functions and clocks */
 114
 115 extern int s3c64xx_sclk_ctrl(struct clk *clk, int enable);
 116
 117 /* Init for pwm clock code */
 118
 119 extern void s3c_pwmclk_init(void);
 120