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