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/clk.h>
   7 #include <linux/err.h>
   8
   9 struct clk;
  10
  11 struct clk_ops {
  12         void (*init)(struct clk *clk);
  13         int (*enable)(struct clk *clk);
  14         void (*disable)(struct clk *clk);
  15         unsigned long (*recalc)(struct clk *clk);
  16         int (*set_rate)(struct clk *clk, unsigned long rate, int algo_id);
  17         int (*set_parent)(struct clk *clk, struct clk *parent);
  18         long (*round_rate)(struct clk *clk, unsigned long rate);
  19 };
  20
  21 struct clk {
  22         struct list_head        node;
  23         const char              *name;
  24         int                     id;
  25         struct module           *owner;
  26
  27         struct clk              *parent;
  28         struct clk_ops          *ops;
  29
  30         struct list_head        children;
  31         struct list_head        sibling;        /* node for children */
  32
  33         int                     usecount;
  34
  35         unsigned long           rate;
  36         unsigned long           flags;
  37
  38         void __iomem            *enable_reg;
  39         unsigned int            enable_bit;
  40
  41         unsigned long           arch_flags;
  42         void                    *priv;
  43         struct dentry           *dentry;
  44 };
  45
  46 struct clk_lookup {
  47         struct list_head        node;
  48         const char              *dev_id;
  49         const char              *con_id;
  50         struct clk              *clk;
  51 };
  52
  53 #define CLK_ENABLE_ON_INIT      (1 << 0)
  54
  55 /* Should be defined by processor-specific code */
  56 void __deprecated arch_init_clk_ops(struct clk_ops **, int type);
  57 int __init arch_clk_init(void);
  58
  59 /* arch/sh/kernel/cpu/clock.c */
  60 int clk_init(void);
  61 unsigned long followparent_recalc(struct clk *);
  62 void recalculate_root_clocks(void);
  63 void propagate_rate(struct clk *);
  64 int clk_reparent(struct clk *child, struct clk *parent);
  65 int clk_register(struct clk *);
  66 void clk_unregister(struct clk *);
  67
  68 /* arch/sh/kernel/cpu/clock-cpg.c */
  69 int __init __deprecated cpg_clk_init(void);
  70
  71 /* the exported API, in addition to clk_set_rate */
  72 /**
  73  * clk_set_rate_ex - set the clock rate for a clock source, with additional parameter
  74  * @clk: clock source
  75  * @rate: desired clock rate in Hz
  76  * @algo_id: algorithm id to be passed down to ops->set_rate
  77  *
  78  * Returns success (0) or negative errno.
  79  */
  80 int clk_set_rate_ex(struct clk *clk, unsigned long rate, int algo_id);
  81
  82 enum clk_sh_algo_id {
  83         NO_CHANGE = 0,
  84
  85         IUS_N1_N1,
  86         IUS_322,
  87         IUS_522,
  88         IUS_N11,
  89
  90         SB_N1,
  91
  92         SB3_N1,
  93         SB3_32,
  94         SB3_43,
  95         SB3_54,
  96
  97         BP_N1,
  98
  99         IP_N1,
 100 };
 101
 102 struct clk_div_mult_table {
 103         unsigned int *divisors;
 104         unsigned int nr_divisors;
 105         unsigned int *multipliers;
 106         unsigned int nr_multipliers;
 107 };
 108
 109 struct cpufreq_frequency_table;
 110 void clk_rate_table_build(struct clk *clk,
 111                           struct cpufreq_frequency_table *freq_table,
 112                           int nr_freqs,
 113                           struct clk_div_mult_table *src_table,
 114                           unsigned long *bitmap);
 115
 116 long clk_rate_table_round(struct clk *clk,
 117                           struct cpufreq_frequency_table *freq_table,
 118                           unsigned long rate);
 119
 120 #define SH_CLK_MSTP32(_name, _id, _parent, _enable_reg, \
 121             _enable_bit, _flags)                        \
 122 {                                                       \
 123         .name           = _name,                        \
 124         .id             = _id,                          \
 125         .parent         = _parent,                      \
 126         .enable_reg     = (void __iomem *)_enable_reg,  \
 127         .enable_bit     = _enable_bit,                  \
 128         .flags          = _flags,                       \
 129 }
 130
 131 int sh_clk_mstp32_register(struct clk *clks, int nr);
 132
 133 #endif /* __ASM_SH_CLOCK_H */