include/linux/clkdev.h

   1 /*
   2  *  include/linux/clkdev.h
   3  *
   4  *  Copyright (C) 2008 Russell King.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * Helper for the clk API to assist looking up a struct clk.
  11  */
  12 #ifndef __CLKDEV_H
  13 #define __CLKDEV_H
  14
  15 #include <asm/clkdev.h>
  16
  17 struct clk;
  18 struct clk_hw;
  19 struct device;
  20
  21 struct clk_lookup {
  22         struct list_head        node;
  23         const char              *dev_id;
  24         const char              *con_id;
  25         struct clk              *clk;
  26         struct clk_hw           *clk_hw;
  27 };
  28
  29 #define CLKDEV_INIT(d, n, c)    \
  30         {                       \
  31                 .dev_id = d,    \
  32                 .con_id = n,    \
  33                 .clk = c,       \
  34         }
  35
  36 struct clk_lookup *clkdev_alloc(struct clk *clk, const char *con_id,
  37         const char *dev_fmt, ...) __printf(3, 4);
  38 struct clk_lookup *clkdev_hw_alloc(struct clk_hw *hw, const char *con_id,
  39         const char *dev_fmt, ...) __printf(3, 4);
  40
  41 void clkdev_add(struct clk_lookup *cl);
  42 void clkdev_drop(struct clk_lookup *cl);
  43
  44 struct clk_lookup *clkdev_create(struct clk *clk, const char *con_id,
  45         const char *dev_fmt, ...) __printf(3, 4);
  46 struct clk_lookup *clkdev_hw_create(struct clk_hw *hw, const char *con_id,
  47         const char *dev_fmt, ...) __printf(3, 4);
  48
  49 void clkdev_add_table(struct clk_lookup *, size_t);
  50 int clk_add_alias(const char *, const char *, const char *, struct device *);
  51
  52 int clk_register_clkdev(struct clk *, const char *, const char *);
  53 int clk_hw_register_clkdev(struct clk_hw *, const char *, const char *);
  54
  55 #ifdef CONFIG_COMMON_CLK
  56 int __clk_get(struct clk *clk);
  57 void __clk_put(struct clk *clk);
  58 #endif
  59
  60 #endif