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      BIT(0)
  63
  64 #define CLK_ENABLE_REG_32BIT    BIT(1)  /* default access size */
  65 #define CLK_ENABLE_REG_16BIT    BIT(2)
  66 #define CLK_ENABLE_REG_8BIT     BIT(3)
  67
  68 #define CLK_ENABLE_REG_MASK     (CLK_ENABLE_REG_32BIT | \
  69                                  CLK_ENABLE_REG_16BIT | \
  70                                  CLK_ENABLE_REG_8BIT)
  71
  72 /* drivers/sh/clk.c */
  73 unsigned long followparent_recalc(struct clk *);
  74 void recalculate_root_clocks(void);
  75 void propagate_rate(struct clk *);
  76 int clk_reparent(struct clk *child, struct clk *parent);
  77 int clk_register(struct clk *);
  78 void clk_unregister(struct clk *);
  79 void clk_enable_init_clocks(void);
  80
  81 struct clk_div_mult_table {
  82         unsigned int *divisors;
  83         unsigned int nr_divisors;
  84         unsigned int *multipliers;
  85         unsigned int nr_multipliers;
  86 };
  87
  88 struct cpufreq_frequency_table;
  89 void clk_rate_table_build(struct clk *clk,
  90                           struct cpufreq_frequency_table *freq_table,
  91                           int nr_freqs,
  92                           struct clk_div_mult_table *src_table,
  93                           unsigned long *bitmap);
  94
  95 long clk_rate_table_round(struct clk *clk,
  96                           struct cpufreq_frequency_table *freq_table,
  97                           unsigned long rate);
  98
  99 int clk_rate_table_find(struct clk *clk,
 100                         struct cpufreq_frequency_table *freq_table,
 101                         unsigned long rate);
 102
 103 long clk_rate_div_range_round(struct clk *clk, unsigned int div_min,
 104                               unsigned int div_max, unsigned long rate);
 105
 106 long clk_rate_mult_range_round(struct clk *clk, unsigned int mult_min,
 107                                unsigned int mult_max, unsigned long rate);
 108
 109 long clk_round_parent(struct clk *clk, unsigned long target,
 110                       unsigned long *best_freq, unsigned long *parent_freq,
 111                       unsigned int div_min, unsigned int div_max);
 112
 113 #define SH_CLK_MSTP(_parent, _enable_reg, _enable_bit, _flags)          \
 114 {                                                                       \
 115         .parent         = _parent,                                      \
 116         .enable_reg     = (void __iomem *)_enable_reg,                  \
 117         .enable_bit     = _enable_bit,                                  \
 118         .flags          = _flags,                                       \
 119 }
 120
 121 #define SH_CLK_MSTP32(_p, _r, _b, _f)                                   \
 122         SH_CLK_MSTP(_p, _r, _b, _f | CLK_ENABLE_REG_32BIT)
 123
 124 #define SH_CLK_MSTP16(_p, _r, _b, _f)                                   \
 125         SH_CLK_MSTP(_p, _r, _b, _f | CLK_ENABLE_REG_16BIT)
 126
 127 #define SH_CLK_MSTP8(_p, _r, _b, _f)                                    \
 128         SH_CLK_MSTP(_p, _r, _b, _f | CLK_ENABLE_REG_8BIT)
 129
 130 int sh_clk_mstp_register(struct clk *clks, int nr);
 131
 132 /*
 133  * MSTP registration never really cared about access size, despite the
 134  * original enable/disable pairs assuming a 32-bit access. Clocks are
 135  * responsible for defining their access sizes either directly or via the
 136  * clock definition wrappers.
 137  */
 138 static inline int __deprecated sh_clk_mstp32_register(struct clk *clks, int nr)
 139 {
 140         return sh_clk_mstp_register(clks, nr);
 141 }
 142
 143 #define SH_CLK_DIV4(_parent, _reg, _shift, _div_bitmap, _flags) \
 144 {                                                               \
 145         .parent = _parent,                                      \
 146         .enable_reg = (void __iomem *)_reg,                     \
 147         .enable_bit = _shift,                                   \
 148         .arch_flags = _div_bitmap,                              \
 149         .flags = _flags,                                        \
 150 }
 151
 152 struct clk_div4_table {
 153         struct clk_div_mult_table *div_mult_table;
 154         void (*kick)(struct clk *clk);
 155 };
 156
 157 int sh_clk_div4_register(struct clk *clks, int nr,
 158                          struct clk_div4_table *table);
 159 int sh_clk_div4_enable_register(struct clk *clks, int nr,
 160                          struct clk_div4_table *table);
 161 int sh_clk_div4_reparent_register(struct clk *clks, int nr,
 162                          struct clk_div4_table *table);
 163
 164 #define SH_CLK_DIV6_EXT(_reg, _flags, _parents,                 \
 165                         _num_parents, _src_shift, _src_width)   \
 166 {                                                               \
 167         .enable_reg = (void __iomem *)_reg,                     \
 168         .flags = _flags,                                        \
 169         .parent_table = _parents,                               \
 170         .parent_num = _num_parents,                             \
 171         .src_shift = _src_shift,                                \
 172         .src_width = _src_width,                                \
 173 }
 174
 175 #define SH_CLK_DIV6(_parent, _reg, _flags)                      \
 176 {                                                               \
 177         .parent         = _parent,                              \
 178         .enable_reg     = (void __iomem *)_reg,                 \
 179         .flags          = _flags,                               \
 180 }
 181
 182 int sh_clk_div6_register(struct clk *clks, int nr);
 183 int sh_clk_div6_reparent_register(struct clk *clks, int nr);
 184
 185 #define CLKDEV_CON_ID(_id, _clk) { .con_id = _id, .clk = _clk }
 186 #define CLKDEV_DEV_ID(_id, _clk) { .dev_id = _id, .clk = _clk }
 187 #define CLKDEV_ICK_ID(_cid, _did, _clk) { .con_id = _cid, .dev_id = _did, .clk = _clk }
 188
 189 #endif /* __SH_CLOCK_H */