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 clk_mapping      *mapping;
  56         struct cpufreq_frequency_table *freq_table;
  57         unsigned int            nr_freqs;
  58 };
  59
  60 #define CLK_ENABLE_ON_INIT      (1 << 0)
  61
  62 /* drivers/sh/clk.c */
  63 unsigned long followparent_recalc(struct clk *);
  64 void recalculate_root_clocks(void);
  65 void propagate_rate(struct clk *);
  66 int clk_reparent(struct clk *child, struct clk *parent);
  67 int clk_register(struct clk *);
  68 void clk_unregister(struct clk *);
  69 void clk_enable_init_clocks(void);
  70
  71 struct clk_div_mult_table {
  72         unsigned int *divisors;
  73         unsigned int nr_divisors;
  74         unsigned int *multipliers;
  75         unsigned int nr_multipliers;
  76 };
  77
  78 struct cpufreq_frequency_table;
  79 void clk_rate_table_build(struct clk *clk,
  80                           struct cpufreq_frequency_table *freq_table,
  81                           int nr_freqs,
  82                           struct clk_div_mult_table *src_table,
  83                           unsigned long *bitmap);
  84
  85 long clk_rate_table_round(struct clk *clk,
  86                           struct cpufreq_frequency_table *freq_table,
  87                           unsigned long rate);
  88
  89 int clk_rate_table_find(struct clk *clk,
  90                         struct cpufreq_frequency_table *freq_table,
  91                         unsigned long rate);
  92
  93 long clk_rate_div_range_round(struct clk *clk, unsigned int div_min,
  94                               unsigned int div_max, unsigned long rate);
  95
  96 long clk_rate_mult_range_round(struct clk *clk, unsigned int mult_min,
  97                                unsigned int mult_max, unsigned long rate);
  98
  99 long clk_round_parent(struct clk *clk, unsigned long target,
 100                       unsigned long *best_freq, unsigned long *parent_freq,
 101                       unsigned int div_min, unsigned int div_max);
 102
 103 #define SH_CLK_MSTP32(_parent, _enable_reg, _enable_bit, _flags)        \
 104 {                                                                       \
 105         .parent         = _parent,                                      \
 106         .enable_reg     = (void __iomem *)_enable_reg,                  \
 107         .enable_bit     = _enable_bit,                                  \
 108         .flags          = _flags,                                       \
 109 }
 110
 111 int sh_clk_mstp32_register(struct clk *clks, int nr);
 112
 113 #define SH_CLK_DIV4(_parent, _reg, _shift, _div_bitmap, _flags) \
 114 {                                                               \
 115         .parent = _parent,                                      \
 116         .enable_reg = (void __iomem *)_reg,                     \
 117         .enable_bit = _shift,                                   \
 118         .arch_flags = _div_bitmap,                              \
 119         .flags = _flags,                                        \
 120 }
 121
 122 struct clk_div4_table {
 123         struct clk_div_mult_table *div_mult_table;
 124         void (*kick)(struct clk *clk);
 125 };
 126
 127 int sh_clk_div4_register(struct clk *clks, int nr,
 128                          struct clk_div4_table *table);
 129 int sh_clk_div4_enable_register(struct clk *clks, int nr,
 130                          struct clk_div4_table *table);
 131 int sh_clk_div4_reparent_register(struct clk *clks, int nr,
 132                          struct clk_div4_table *table);
 133
 134 #define SH_CLK_DIV6_EXT(_parent, _reg, _flags, _parents,        \
 135                         _num_parents, _src_shift, _src_width)   \
 136 {                                                               \
 137         .parent = _parent,                                      \
 138         .enable_reg = (void __iomem *)_reg,                     \
 139         .flags = _flags,                                        \
 140         .parent_table = _parents,                               \
 141         .parent_num = _num_parents,                             \
 142         .src_shift = _src_shift,                                \
 143         .src_width = _src_width,                                \
 144 }
 145
 146 #define SH_CLK_DIV6(_parent, _reg, _flags)                      \
 147         SH_CLK_DIV6_EXT(_parent, _reg, _flags, NULL, 0, 0, 0)
 148
 149 int sh_clk_div6_register(struct clk *clks, int nr);
 150 int sh_clk_div6_reparent_register(struct clk *clks, int nr);
 151
 152 #define CLKDEV_CON_ID(_id, _clk) { .con_id = _id, .clk = _clk }
 153 #define CLKDEV_DEV_ID(_id, _clk) { .dev_id = _id, .clk = _clk }
 154 #define CLKDEV_ICK_ID(_cid, _did, _clk) { .con_id = _cid, .dev_id = _did, .clk = _clk }
 155
 156 #endif /* __SH_CLOCK_H */