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         void (*build_rate_table)(struct clk *clk);
  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 };
  46
  47 struct clk_lookup {
  48         struct list_head        node;
  49         const char              *dev_id;
  50         const char              *con_id;
  51         struct clk              *clk;
  52 };
  53
  54 #define CLK_ENABLE_ON_INIT      (1 << 0)
  55
  56 /* Should be defined by processor-specific code */
  57 void __deprecated arch_init_clk_ops(struct clk_ops **, int type);
  58 int __init arch_clk_init(void);
  59
  60 /* arch/sh/kernel/cpu/clock.c */
  61 int clk_init(void);
  62 unsigned long followparent_recalc(struct clk *);
  63 void recalculate_root_clocks(void);
  64 void propagate_rate(struct clk *);
  65 int clk_reparent(struct clk *child, struct clk *parent);
  66 int clk_register(struct clk *);
  67 void clk_unregister(struct clk *);
  68
  69 /* arch/sh/kernel/cpu/clock-cpg.c */
  70 int __init __deprecated cpg_clk_init(void);
  71
  72 /* the exported API, in addition to clk_set_rate */
  73 /**
  74  * clk_set_rate_ex - set the clock rate for a clock source, with additional parameter
  75  * @clk: clock source
  76  * @rate: desired clock rate in Hz
  77  * @algo_id: algorithm id to be passed down to ops->set_rate
  78  *
  79  * Returns success (0) or negative errno.
  80  */
  81 int clk_set_rate_ex(struct clk *clk, unsigned long rate, int algo_id);
  82
  83 enum clk_sh_algo_id {
  84         NO_CHANGE = 0,
  85
  86         IUS_N1_N1,
  87         IUS_322,
  88         IUS_522,
  89         IUS_N11,
  90
  91         SB_N1,
  92
  93         SB3_N1,
  94         SB3_32,
  95         SB3_43,
  96         SB3_54,
  97
  98         BP_N1,
  99
 100         IP_N1,
 101 };
 102
 103 struct clk_div_mult_table {
 104         unsigned int *divisors;
 105         unsigned int nr_divisors;
 106         unsigned int *multipliers;
 107         unsigned int nr_multipliers;
 108 };
 109
 110 struct cpufreq_frequency_table;
 111 void clk_rate_table_build(struct clk *clk,
 112                           struct cpufreq_frequency_table *freq_table,
 113                           int nr_freqs,
 114                           struct clk_div_mult_table *src_table,
 115                           unsigned long *bitmap);
 116
 117 long clk_rate_table_round(struct clk *clk,
 118                           struct cpufreq_frequency_table *freq_table,
 119                           unsigned long rate);
 120
 121 #endif /* __ASM_SH_CLOCK_H */