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/clk.h>
   8 #include <linux/err.h>
   9
  10 struct clk;
  11
  12 struct clk_ops {
  13         void (*init)(struct clk *clk);
  14         int (*enable)(struct clk *clk);
  15         void (*disable)(struct clk *clk);
  16         unsigned long (*recalc)(struct clk *clk);
  17         int (*set_rate)(struct clk *clk, unsigned long rate, int algo_id);
  18         int (*set_parent)(struct clk *clk, struct clk *parent);
  19         long (*round_rate)(struct clk *clk, unsigned long rate);
  20 };
  21
  22 struct clk {
  23         struct list_head        node;
  24         const char              *name;
  25         int                     id;
  26
  27         struct clk              *parent;
  28         struct clk              **parent_table; /* list of parents to */
  29         unsigned short          parent_num;     /* choose between */
  30         unsigned char           src_shift;      /* source clock field in the */
  31         unsigned char           src_width;      /* configuration register */
  32         struct clk_ops          *ops;
  33
  34         struct list_head        children;
  35         struct list_head        sibling;        /* node for children */
  36
  37         int                     usecount;
  38
  39         unsigned long           rate;
  40         unsigned long           flags;
  41
  42         void __iomem            *enable_reg;
  43         unsigned int            enable_bit;
  44
  45         unsigned long           arch_flags;
  46         void                    *priv;
  47         struct dentry           *dentry;
  48         struct cpufreq_frequency_table *freq_table;
  49 };
  50
  51 #define CLK_ENABLE_ON_INIT      (1 << 0)
  52
  53 /* drivers/sh/clk.c */
  54 unsigned long followparent_recalc(struct clk *);
  55 void recalculate_root_clocks(void);
  56 void propagate_rate(struct clk *);
  57 int clk_reparent(struct clk *child, struct clk *parent);
  58 int clk_register(struct clk *);
  59 void clk_unregister(struct clk *);
  60 void clk_enable_init_clocks(void);
  61
  62 /**
  63  * clk_set_rate_ex - set the clock rate for a clock source, with additional parameter
  64  * @clk: clock source
  65  * @rate: desired clock rate in Hz
  66  * @algo_id: algorithm id to be passed down to ops->set_rate
  67  *
  68  * Returns success (0) or negative errno.
  69  */
  70 int clk_set_rate_ex(struct clk *clk, unsigned long rate, int algo_id);
  71
  72 enum clk_sh_algo_id {
  73         NO_CHANGE = 0,
  74
  75         IUS_N1_N1,
  76         IUS_322,
  77         IUS_522,
  78         IUS_N11,
  79
  80         SB_N1,
  81
  82         SB3_N1,
  83         SB3_32,
  84         SB3_43,
  85         SB3_54,
  86
  87         BP_N1,
  88
  89         IP_N1,
  90 };
  91
  92 struct clk_div_mult_table {
  93         unsigned int *divisors;
  94         unsigned int nr_divisors;
  95         unsigned int *multipliers;
  96         unsigned int nr_multipliers;
  97 };
  98
  99 struct cpufreq_frequency_table;
 100 void clk_rate_table_build(struct clk *clk,
 101                           struct cpufreq_frequency_table *freq_table,
 102                           int nr_freqs,
 103                           struct clk_div_mult_table *src_table,
 104                           unsigned long *bitmap);
 105
 106 long clk_rate_table_round(struct clk *clk,
 107                           struct cpufreq_frequency_table *freq_table,
 108                           unsigned long rate);
 109
 110 int clk_rate_table_find(struct clk *clk,
 111                         struct cpufreq_frequency_table *freq_table,
 112                         unsigned long rate);
 113
 114 #define SH_CLK_MSTP32(_parent, _enable_reg, _enable_bit, _flags)        \
 115 {                                                                       \
 116         .parent         = _parent,                                      \
 117         .enable_reg     = (void __iomem *)_enable_reg,                  \
 118         .enable_bit     = _enable_bit,                                  \
 119         .flags          = _flags,                                       \
 120 }
 121
 122 int sh_clk_mstp32_register(struct clk *clks, int nr);
 123
 124 #define SH_CLK_DIV4(_parent, _reg, _shift, _div_bitmap, _flags) \
 125 {                                                               \
 126         .parent = _parent,                                      \
 127         .enable_reg = (void __iomem *)_reg,                     \
 128         .enable_bit = _shift,                                   \
 129         .arch_flags = _div_bitmap,                              \
 130         .flags = _flags,                                        \
 131 }
 132
 133 struct clk_div4_table {
 134         struct clk_div_mult_table *div_mult_table;
 135         void (*kick)(struct clk *clk);
 136 };
 137
 138 int sh_clk_div4_register(struct clk *clks, int nr,
 139                          struct clk_div4_table *table);
 140 int sh_clk_div4_enable_register(struct clk *clks, int nr,
 141                          struct clk_div4_table *table);
 142 int sh_clk_div4_reparent_register(struct clk *clks, int nr,
 143                          struct clk_div4_table *table);
 144
 145 #define SH_CLK_DIV6_EXT(_parent, _reg, _flags, _parents,        \
 146                         _num_parents, _src_shift, _src_width)   \
 147 {                                                               \
 148         .parent = _parent,                                      \
 149         .enable_reg = (void __iomem *)_reg,                     \
 150         .flags = _flags,                                        \
 151         .parent_table = _parents,                               \
 152         .parent_num = _num_parents,                             \
 153         .src_shift = _src_shift,                                \
 154         .src_width = _src_width,                                \
 155 }
 156
 157 #define SH_CLK_DIV6(_parent, _reg, _flags)                      \
 158         SH_CLK_DIV6_EXT(_parent, _reg, _flags, NULL, 0, 0, 0)
 159
 160 int sh_clk_div6_register(struct clk *clks, int nr);
 161 int sh_clk_div6_reparent_register(struct clk *clks, int nr);
 162
 163 #endif /* __SH_CLOCK_H */