arch/sh/include/asm/clock.h

   1 #ifndef __ASM_SH_CLOCK_H
   2 #define __ASM_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         struct module           *owner;
  27
  28         struct clk              *parent;
  29         struct clk_ops          *ops;
  30
  31         struct list_head        children;
  32         struct list_head        sibling;        /* node for children */
  33
  34         int                     usecount;
  35
  36         unsigned long           rate;
  37         unsigned long           flags;
  38
  39         void __iomem            *enable_reg;
  40         unsigned int            enable_bit;
  41
  42         unsigned long           arch_flags;
  43         void                    *priv;
  44         struct dentry           *dentry;
  45         struct cpufreq_frequency_table *freq_table;
  46 };
  47
  48 struct clk_lookup {
  49         struct list_head        node;
  50         const char              *dev_id;
  51         const char              *con_id;
  52         struct clk              *clk;
  53 };
  54
  55 #define CLK_ENABLE_ON_INIT      (1 << 0)
  56
  57 /* Should be defined by processor-specific code */
  58 void __deprecated arch_init_clk_ops(struct clk_ops **, int type);
  59 int __init arch_clk_init(void);
  60
  61 /* arch/sh/kernel/cpu/clock.c */
  62 int clk_init(void);
  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
  70 /* arch/sh/kernel/cpu/clock-cpg.c */
  71 int __init __deprecated cpg_clk_init(void);
  72
  73 /* the exported API, in addition to clk_set_rate */
  74 /**
  75  * clk_set_rate_ex - set the clock rate for a clock source, with additional parameter
  76  * @clk: clock source
  77  * @rate: desired clock rate in Hz
  78  * @algo_id: algorithm id to be passed down to ops->set_rate
  79  *
  80  * Returns success (0) or negative errno.
  81  */
  82 int clk_set_rate_ex(struct clk *clk, unsigned long rate, int algo_id);
  83
  84 enum clk_sh_algo_id {
  85         NO_CHANGE = 0,
  86
  87         IUS_N1_N1,
  88         IUS_322,
  89         IUS_522,
  90         IUS_N11,
  91
  92         SB_N1,
  93
  94         SB3_N1,
  95         SB3_32,
  96         SB3_43,
  97         SB3_54,
  98
  99         BP_N1,
 100
 101         IP_N1,
 102 };
 103
 104 struct clk_div_mult_table {
 105         unsigned int *divisors;
 106         unsigned int nr_divisors;
 107         unsigned int *multipliers;
 108         unsigned int nr_multipliers;
 109 };
 110
 111 struct cpufreq_frequency_table;
 112 void clk_rate_table_build(struct clk *clk,
 113                           struct cpufreq_frequency_table *freq_table,
 114                           int nr_freqs,
 115                           struct clk_div_mult_table *src_table,
 116                           unsigned long *bitmap);
 117
 118 long clk_rate_table_round(struct clk *clk,
 119                           struct cpufreq_frequency_table *freq_table,
 120                           unsigned long rate);
 121
 122 int clk_rate_table_find(struct clk *clk,
 123                         struct cpufreq_frequency_table *freq_table,
 124                         unsigned long rate);
 125
 126 #define SH_CLK_MSTP32(_name, _id, _parent, _enable_reg, \
 127             _enable_bit, _flags)                        \
 128 {                                                       \
 129         .name           = _name,                        \
 130         .id             = _id,                          \
 131         .parent         = _parent,                      \
 132         .enable_reg     = (void __iomem *)_enable_reg,  \
 133         .enable_bit     = _enable_bit,                  \
 134         .flags          = _flags,                       \
 135 }
 136
 137 int sh_clk_mstp32_register(struct clk *clks, int nr);
 138
 139 #define SH_CLK_DIV4(_name, _parent, _reg, _shift, _div_bitmap, _flags)  \
 140 {                                                                       \
 141         .name = _name,                                                  \
 142         .parent = _parent,                                              \
 143         .enable_reg = (void __iomem *)_reg,                             \
 144         .enable_bit = _shift,                                           \
 145         .arch_flags = _div_bitmap,                                      \
 146         .flags = _flags,                                                \
 147 }
 148
 149 int sh_clk_div4_register(struct clk *clks, int nr,
 150                          struct clk_div_mult_table *table);
 151
 152 #define SH_CLK_DIV6(_name, _parent, _reg, _flags)       \
 153 {                                                       \
 154         .name = _name,                                  \
 155         .parent = _parent,                              \
 156         .enable_reg = (void __iomem *)_reg,             \
 157         .flags = _flags,                                \
 158 }
 159
 160 int sh_clk_div6_register(struct clk *clks, int nr);
 161
 162 #endif /* __ASM_SH_CLOCK_H */