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 #include <linux/err.h>
   9
  10 struct clk;
  11
  12 struct clk_ops {
  13         void (*init)(struct clk *clk);
  14         void (*enable)(struct clk *clk);
  15         void (*disable)(struct clk *clk);
  16         void (*recalc)(struct clk *clk);
  17         int (*set_rate)(struct clk *clk, unsigned long rate, int algo_id);
  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 kref             kref;
  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
  40 /* Should be defined by processor-specific code */
  41 void arch_init_clk_ops(struct clk_ops **, int type);
  42
  43 /* arch/sh/kernel/cpu/clock.c */
  44 int clk_init(void);
  45
  46 void clk_recalc_rate(struct clk *);
  47
  48 int clk_register(struct clk *);
  49 void clk_unregister(struct clk *);
  50
  51 static inline int clk_always_enable(const char *id)
  52 {
  53         struct clk *clk;
  54         int ret;
  55
  56         clk = clk_get(NULL, id);
  57         if (IS_ERR(clk))
  58                 return PTR_ERR(clk);
  59
  60         ret = clk_enable(clk);
  61         if (ret)
  62                 clk_put(clk);
  63
  64         return ret;
  65 }
  66
  67 /* the exported API, in addition to clk_set_rate */
  68 /**
  69  * clk_set_rate_ex - set the clock rate for a clock source, with additional parameter
  70  * @clk: clock source
  71  * @rate: desired clock rate in Hz
  72  * @algo_id: algorithm id to be passed down to ops->set_rate
  73  *
  74  * Returns success (0) or negative errno.
  75  */
  76 int clk_set_rate_ex(struct clk *clk, unsigned long rate, int algo_id);
  77
  78 enum clk_sh_algo_id {
  79         NO_CHANGE = 0,
  80
  81         IUS_N1_N1,
  82         IUS_322,
  83         IUS_522,
  84         IUS_N11,
  85
  86         SB_N1,
  87
  88         SB3_N1,
  89         SB3_32,
  90         SB3_43,
  91         SB3_54,
  92
  93         BP_N1,
  94
  95         IP_N1,
  96 };
  97 #endif /* __ASM_SH_CLOCK_H */