include/asm-sh/clock.h

   1 #ifndef __ASM_SH_CLOCK_H
   2 #define __ASM_SH_CLOCK_H
   3
   4 #include <linux/kref.h>
   5 #include <linux/list.h>
   6 #include <linux/seq_file.h>
   7 #include <linux/clk.h>
   8
   9 struct clk;
  10
  11 struct clk_ops {
  12         void (*init)(struct clk *clk);
  13         void (*enable)(struct clk *clk);
  14         void (*disable)(struct clk *clk);
  15         void (*recalc)(struct clk *clk);
  16         int (*set_rate)(struct clk *clk, unsigned long rate, int algo_id);
  17 };
  18
  19 struct clk {
  20         struct list_head        node;
  21         const char              *name;
  22         int                     id;
  23         struct module           *owner;
  24
  25         struct clk              *parent;
  26         struct clk_ops          *ops;
  27
  28         struct kref             kref;
  29
  30         unsigned long           rate;
  31         unsigned long           flags;
  32 };
  33
  34 #define CLK_ALWAYS_ENABLED      (1 << 0)
  35 #define CLK_RATE_PROPAGATES     (1 << 1)
  36
  37 /* Should be defined by processor-specific code */
  38 void arch_init_clk_ops(struct clk_ops **, int type);
  39
  40 /* arch/sh/kernel/cpu/clock.c */
  41 int clk_init(void);
  42
  43 int __clk_enable(struct clk *);
  44 void __clk_disable(struct clk *);
  45
  46 void clk_recalc_rate(struct clk *);
  47
  48 int clk_register(struct clk *);
  49 void clk_unregister(struct clk *);
  50
  51 /* the exported API, in addition to clk_set_rate */
  52 /**
  53  * clk_set_rate_ex - set the clock rate for a clock source, with additional parameter
  54  * @clk: clock source
  55  * @rate: desired clock rate in Hz
  56  * @algo_id: algorithm id to be passed down to ops->set_rate
  57  *
  58  * Returns success (0) or negative errno.
  59  */
  60 int clk_set_rate_ex(struct clk *clk, unsigned long rate, int algo_id);
  61
  62 enum clk_sh_algo_id {
  63         NO_CHANGE = 0,
  64
  65         IUS_N1_N1,
  66         IUS_322,
  67         IUS_522,
  68         IUS_N11,
  69
  70         SB_N1,
  71
  72         SB3_N1,
  73         SB3_32,
  74         SB3_43,
  75         SB3_54,
  76
  77         BP_N1,
  78
  79         IP_N1,
  80 };
  81 #endif /* __ASM_SH_CLOCK_H */