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         void (*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         int                     usecount;
  31
  32         unsigned long           rate;
  33         unsigned long           flags;
  34         unsigned long           arch_flags;
  35 };
  36
  37 #define CLK_ALWAYS_ENABLED      (1 << 0)
  38 #define CLK_RATE_PROPAGATES     (1 << 1)
  39 #define CLK_NEEDS_INIT          (1 << 2)
  40
  41 /* Should be defined by processor-specific code */
  42 void arch_init_clk_ops(struct clk_ops **, int type);
  43 int __init arch_clk_init(void);
  44
  45 /* arch/sh/kernel/cpu/clock.c */
  46 int clk_init(void);
  47
  48 void clk_recalc_rate(struct clk *);
  49
  50 int clk_register(struct clk *);
  51 void clk_unregister(struct clk *);
  52
  53 static inline int clk_always_enable(const char *id)
  54 {
  55         struct clk *clk;
  56         int ret;
  57
  58         clk = clk_get(NULL, id);
  59         if (IS_ERR(clk))
  60                 return PTR_ERR(clk);
  61
  62         ret = clk_enable(clk);
  63         if (ret)
  64                 clk_put(clk);
  65
  66         return ret;
  67 }
  68
  69 /* the exported API, in addition to clk_set_rate */
  70 /**
  71  * clk_set_rate_ex - set the clock rate for a clock source, with additional parameter
  72  * @clk: clock source
  73  * @rate: desired clock rate in Hz
  74  * @algo_id: algorithm id to be passed down to ops->set_rate
  75  *
  76  * Returns success (0) or negative errno.
  77  */
  78 int clk_set_rate_ex(struct clk *clk, unsigned long rate, int algo_id);
  79
  80 enum clk_sh_algo_id {
  81         NO_CHANGE = 0,
  82
  83         IUS_N1_N1,
  84         IUS_322,
  85         IUS_522,
  86         IUS_N11,
  87
  88         SB_N1,
  89
  90         SB3_N1,
  91         SB3_32,
  92         SB3_43,
  93         SB3_54,
  94
  95         BP_N1,
  96
  97         IP_N1,
  98 };
  99
 100 #endif /* __ASM_SH_CLOCK_H */