include/linux/sh_clk.h

   1 #ifndef __SH_CLOCK_H
   2 #define __SH_CLOCK_H
   3
   4 #include <linux/list.h>
   5 #include <linux/seq_file.h>
   6 #include <linux/cpufreq.h>
   7 #include <linux/types.h>
   8 #include <linux/kref.h>
   9 #include <linux/clk.h>
  10 #include <linux/err.h>
  11
  12 struct clk;
  13
  14 struct clk_mapping {
  15         phys_addr_t             phys;
  16         void __iomem            *base;
  17         unsigned long           len;
  18         struct kref             ref;
  19 };
  20
  21 struct clk_ops {
  22 #ifdef CONFIG_SH_CLK_CPG_LEGACY
  23         void (*init)(struct clk *clk);
  24 #endif
  25         int (*enable)(struct clk *clk);
  26         void (*disable)(struct clk *clk);
  27         unsigned long (*recalc)(struct clk *clk);
  28         int (*set_rate)(struct clk *clk, unsigned long rate);
  29         int (*set_parent)(struct clk *clk, struct clk *parent);
  30         long (*round_rate)(struct clk *clk, unsigned long rate);
  31 };
  32
  33 struct clk {
  34         struct list_head        node;
  35         struct clk              *parent;
  36         struct clk              **parent_table; /* list of parents to */
  37         unsigned short          parent_num;     /* choose between */
  38         unsigned char           src_shift;      /* source clock field in the */
  39         unsigned char           src_width;      /* configuration register */
  40         struct clk_ops          *ops;
  41
  42         struct list_head        children;
  43         struct list_head        sibling;        /* node for children */
  44
  45         int                     usecount;
  46
  47         unsigned long           rate;
  48         unsigned long           flags;
  49
  50         void __iomem            *enable_reg;
  51         unsigned int            enable_bit;
  52
  53         unsigned long           arch_flags;
  54         void                    *priv;
  55         struct dentry           *dentry;
  56         struct clk_mapping      *mapping;
  57         struct cpufreq_frequency_table *freq_table;
  58         unsigned int            nr_freqs;
  59 };
  60
  61 #define CLK_ENABLE_ON_INIT      (1 << 0)
  62
  63 /* drivers/sh/clk.c */
  64 unsigned long followparent_recalc(struct clk *);
  65 void recalculate_root_clocks(void);
  66 void propagate_rate(struct clk *);
  67 int clk_reparent(struct clk *child, struct clk *parent);
  68 int clk_register(struct clk *);
  69 void clk_unregister(struct clk *);
  70 void clk_enable_init_clocks(void);
  71
  72 struct clk_div_mult_table {
  73         unsigned int *divisors;
  74         unsigned int nr_divisors;
  75         unsigned int *multipliers;
  76         unsigned int nr_multipliers;
  77 };
  78
  79 struct cpufreq_frequency_table;
  80 void clk_rate_table_build(struct clk *clk,
  81                           struct cpufreq_frequency_table *freq_table,
  82                           int nr_freqs,
  83                           struct clk_div_mult_table *src_table,
  84                           unsigned long *bitmap);
  85
  86 long clk_rate_table_round(struct clk *clk,
  87                           struct cpufreq_frequency_table *freq_table,
  88                           unsigned long rate);
  89
  90 int clk_rate_table_find(struct clk *clk,
  91                         struct cpufreq_frequency_table *freq_table,
  92                         unsigned long rate);
  93
  94 long clk_rate_div_range_round(struct clk *clk, unsigned int div_min,
  95                               unsigned int div_max, unsigned long rate);
  96
  97 long clk_round_parent(struct clk *clk, unsigned long target,
  98                       unsigned long *best_freq, unsigned long *parent_freq,
  99                       unsigned int div_min, unsigned int div_max);
 100
 101 #define SH_CLK_MSTP32(_parent, _enable_reg, _enable_bit, _flags)        \
 102 {                                                                       \
 103         .parent         = _parent,                                      \
 104         .enable_reg     = (void __iomem *)_enable_reg,                  \
 105         .enable_bit     = _enable_bit,                                  \
 106         .flags          = _flags,                                       \
 107 }
 108
 109 int sh_clk_mstp32_register(struct clk *clks, int nr);
 110
 111 #define SH_CLK_DIV4(_parent, _reg, _shift, _div_bitmap, _flags) \
 112 {                                                               \
 113         .parent = _parent,                                      \
 114         .enable_reg = (void __iomem *)_reg,                     \
 115         .enable_bit = _shift,                                   \
 116         .arch_flags = _div_bitmap,                              \
 117         .flags = _flags,                                        \
 118 }
 119
 120 struct clk_div4_table {
 121         struct clk_div_mult_table *div_mult_table;
 122         void (*kick)(struct clk *clk);
 123 };
 124
 125 int sh_clk_div4_register(struct clk *clks, int nr,
 126                          struct clk_div4_table *table);
 127 int sh_clk_div4_enable_register(struct clk *clks, int nr,
 128                          struct clk_div4_table *table);
 129 int sh_clk_div4_reparent_register(struct clk *clks, int nr,
 130                          struct clk_div4_table *table);
 131
 132 #define SH_CLK_DIV6_EXT(_parent, _reg, _flags, _parents,        \
 133                         _num_parents, _src_shift, _src_width)   \
 134 {                                                               \
 135         .parent = _parent,                                      \
 136         .enable_reg = (void __iomem *)_reg,                     \
 137         .flags = _flags,                                        \
 138         .parent_table = _parents,                               \
 139         .parent_num = _num_parents,                             \
 140         .src_shift = _src_shift,                                \
 141         .src_width = _src_width,                                \
 142 }
 143
 144 #define SH_CLK_DIV6(_parent, _reg, _flags)                      \
 145         SH_CLK_DIV6_EXT(_parent, _reg, _flags, NULL, 0, 0, 0)
 146
 147 int sh_clk_div6_register(struct clk *clks, int nr);
 148 int sh_clk_div6_reparent_register(struct clk *clks, int nr);
 149
 150 #endif /* __SH_CLOCK_H */