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
  22 struct sh_clk_ops {
  23 #ifdef CONFIG_SH_CLK_CPG_LEGACY
  24         void (*init)(struct clk *clk);
  25 #endif
  26         int (*enable)(struct clk *clk);
  27         void (*disable)(struct clk *clk);
  28         unsigned long (*recalc)(struct clk *clk);
  29         int (*set_rate)(struct clk *clk, unsigned long rate);
  30         int (*set_parent)(struct clk *clk, struct clk *parent);
  31         long (*round_rate)(struct clk *clk, unsigned long rate);
  32 };
  33
  34 struct clk {
  35         struct list_head        node;
  36         struct clk              *parent;
  37         struct clk              **parent_table; /* list of parents to */
  38         unsigned short          parent_num;     /* choose between */
  39         unsigned char           src_shift;      /* source clock field in the */
  40         unsigned char           src_width;      /* configuration register */
  41         struct sh_clk_ops       *ops;
  42
  43         struct list_head        children;
  44         struct list_head        sibling;        /* node for children */
  45
  46         int                     usecount;
  47
  48         unsigned long           rate;
  49         unsigned long           flags;
  50
  51         void __iomem            *enable_reg;
  52         unsigned int            enable_bit;
  53         void __iomem            *mapped_reg;
  54
  55         unsigned long           arch_flags;
  56         void                    *priv;
  57         struct clk_mapping      *mapping;
  58         struct cpufreq_frequency_table *freq_table;
  59         unsigned int            nr_freqs;
  60 };
  61
  62 #define CLK_ENABLE_ON_INIT      (1 << 0)
  63
  64 /* drivers/sh/clk.c */
  65 unsigned long followparent_recalc(struct clk *);
  66 void recalculate_root_clocks(void);
  67 void propagate_rate(struct clk *);
  68 int clk_reparent(struct clk *child, struct clk *parent);
  69 int clk_register(struct clk *);
  70 void clk_unregister(struct clk *);
  71 void clk_enable_init_clocks(void);
  72
  73 struct clk_div_mult_table {
  74         unsigned int *divisors;
  75         unsigned int nr_divisors;
  76         unsigned int *multipliers;
  77         unsigned int nr_multipliers;
  78 };
  79
  80 struct cpufreq_frequency_table;
  81 void clk_rate_table_build(struct clk *clk,
  82                           struct cpufreq_frequency_table *freq_table,
  83                           int nr_freqs,
  84                           struct clk_div_mult_table *src_table,
  85                           unsigned long *bitmap);
  86
  87 long clk_rate_table_round(struct clk *clk,
  88                           struct cpufreq_frequency_table *freq_table,
  89                           unsigned long rate);
  90
  91 int clk_rate_table_find(struct clk *clk,
  92                         struct cpufreq_frequency_table *freq_table,
  93                         unsigned long rate);
  94
  95 long clk_rate_div_range_round(struct clk *clk, unsigned int div_min,
  96                               unsigned int div_max, unsigned long rate);
  97
  98 long clk_rate_mult_range_round(struct clk *clk, unsigned int mult_min,
  99                                unsigned int mult_max, unsigned long rate);
 100
 101 long clk_round_parent(struct clk *clk, unsigned long target,
 102                       unsigned long *best_freq, unsigned long *parent_freq,
 103                       unsigned int div_min, unsigned int div_max);
 104
 105 #define SH_CLK_MSTP32(_parent, _enable_reg, _enable_bit, _flags)        \
 106 {                                                                       \
 107         .parent         = _parent,                                      \
 108         .enable_reg     = (void __iomem *)_enable_reg,                  \
 109         .enable_bit     = _enable_bit,                                  \
 110         .flags          = _flags,                                       \
 111 }
 112
 113 int sh_clk_mstp32_register(struct clk *clks, int nr);
 114
 115 #define SH_CLK_DIV4(_parent, _reg, _shift, _div_bitmap, _flags) \
 116 {                                                               \
 117         .parent = _parent,                                      \
 118         .enable_reg = (void __iomem *)_reg,                     \
 119         .enable_bit = _shift,                                   \
 120         .arch_flags = _div_bitmap,                              \
 121         .flags = _flags,                                        \
 122 }
 123
 124 struct clk_div4_table {
 125         struct clk_div_mult_table *div_mult_table;
 126         void (*kick)(struct clk *clk);
 127 };
 128
 129 int sh_clk_div4_register(struct clk *clks, int nr,
 130                          struct clk_div4_table *table);
 131 int sh_clk_div4_enable_register(struct clk *clks, int nr,
 132                          struct clk_div4_table *table);
 133 int sh_clk_div4_reparent_register(struct clk *clks, int nr,
 134                          struct clk_div4_table *table);
 135
 136 #define SH_CLK_DIV6_EXT(_reg, _flags, _parents,                 \
 137                         _num_parents, _src_shift, _src_width)   \
 138 {                                                               \
 139         .enable_reg = (void __iomem *)_reg,                     \
 140         .flags = _flags,                                        \
 141         .parent_table = _parents,                               \
 142         .parent_num = _num_parents,                             \
 143         .src_shift = _src_shift,                                \
 144         .src_width = _src_width,                                \
 145 }
 146
 147 #define SH_CLK_DIV6(_parent, _reg, _flags)                      \
 148 {                                                               \
 149         .parent         = _parent,                              \
 150         .enable_reg     = (void __iomem *)_reg,                 \
 151         .flags          = _flags,                               \
 152 }
 153
 154 int sh_clk_div6_register(struct clk *clks, int nr);
 155 int sh_clk_div6_reparent_register(struct clk *clks, int nr);
 156
 157 #define CLKDEV_CON_ID(_id, _clk) { .con_id = _id, .clk = _clk }
 158 #define CLKDEV_DEV_ID(_id, _clk) { .dev_id = _id, .clk = _clk }
 159 #define CLKDEV_ICK_ID(_cid, _did, _clk) { .con_id = _cid, .dev_id = _did, .clk = _clk }
 160
 161 #endif /* __SH_CLOCK_H */