arch/blackfin/include/asm/clocks.h

   1 /*
   2  * Common Clock definitions for various kernel files
   3  *
   4  * Copyright 2007-2008 Analog Devices Inc.
   5  *
   6  * Licensed under the GPL-2 or later.
   7  */
   8
   9 #ifndef _BFIN_CLOCKS_H
  10 #define _BFIN_CLOCKS_H
  11
  12 #include <asm/dpmc.h>
  13
  14 #ifdef CONFIG_CCLK_DIV_1
  15 # define CONFIG_CCLK_ACT_DIV   CCLK_DIV1
  16 # define CONFIG_CCLK_DIV 1
  17 #endif
  18
  19 #ifdef CONFIG_CCLK_DIV_2
  20 # define CONFIG_CCLK_ACT_DIV   CCLK_DIV2
  21 # define CONFIG_CCLK_DIV 2
  22 #endif
  23
  24 #ifdef CONFIG_CCLK_DIV_4
  25 # define CONFIG_CCLK_ACT_DIV   CCLK_DIV4
  26 # define CONFIG_CCLK_DIV 4
  27 #endif
  28
  29 #ifdef CONFIG_CCLK_DIV_8
  30 # define CONFIG_CCLK_ACT_DIV   CCLK_DIV8
  31 # define CONFIG_CCLK_DIV 8
  32 #endif
  33
  34 #ifndef CONFIG_PLL_BYPASS
  35 # ifndef CONFIG_CLKIN_HALF
  36 #  define CONFIG_VCO_HZ   (CONFIG_CLKIN_HZ * CONFIG_VCO_MULT)
  37 # else
  38 #  define CONFIG_VCO_HZ   ((CONFIG_CLKIN_HZ * CONFIG_VCO_MULT)/2)
  39 # endif
  40
  41 # define CONFIG_CCLK_HZ  (CONFIG_VCO_HZ/CONFIG_CCLK_DIV)
  42 # define CONFIG_SCLK_HZ  (CONFIG_VCO_HZ/CONFIG_SCLK_DIV)
  43
  44 #else
  45 # define CONFIG_VCO_HZ   (CONFIG_CLKIN_HZ)
  46 # define CONFIG_CCLK_HZ  (CONFIG_CLKIN_HZ)
  47 # define CONFIG_SCLK_HZ  (CONFIG_CLKIN_HZ)
  48 # define CONFIG_VCO_MULT 0
  49 #endif
  50
  51 #include <linux/clk.h>
  52
  53 struct clk_ops {
  54         unsigned long (*get_rate)(struct clk *clk);
  55         unsigned long (*round_rate)(struct clk *clk, unsigned long rate);
  56         int (*set_rate)(struct clk *clk, unsigned long rate);
  57         int (*enable)(struct clk *clk);
  58         int (*disable)(struct clk *clk);
  59 };
  60
  61 struct clk {
  62         struct clk              *parent;
  63         const char              *name;
  64         unsigned long           rate;
  65         spinlock_t              lock;
  66         u32                     flags;
  67         const struct clk_ops    *ops;
  68         void __iomem            *reg;
  69         u32                     mask;
  70         u32                     shift;
  71 };
  72
  73 int clk_init(void);
  74 #endif