arch/powerpc/kernel/clock.c

   1 /*
   2  * Dummy clk implementations for powerpc.
   3  * These need to be overridden in platform code.
   4  */
   5
   6 #include <linux/clk.h>
   7 #include <linux/err.h>
   8 #include <linux/errno.h>
   9 #include <linux/export.h>
  10 #include <asm/clk_interface.h>
  11
  12 struct clk_interface clk_functions;
  13
  14 struct clk *clk_get(struct device *dev, const char *id)
  15 {
  16         if (clk_functions.clk_get)
  17                 return clk_functions.clk_get(dev, id);
  18         return ERR_PTR(-ENOSYS);
  19 }
  20 EXPORT_SYMBOL(clk_get);
  21
  22 void clk_put(struct clk *clk)
  23 {
  24         if (clk_functions.clk_put)
  25                 clk_functions.clk_put(clk);
  26 }
  27 EXPORT_SYMBOL(clk_put);
  28
  29 int clk_enable(struct clk *clk)
  30 {
  31         if (clk_functions.clk_enable)
  32                 return clk_functions.clk_enable(clk);
  33         return -ENOSYS;
  34 }
  35 EXPORT_SYMBOL(clk_enable);
  36
  37 void clk_disable(struct clk *clk)
  38 {
  39         if (clk_functions.clk_disable)
  40                 clk_functions.clk_disable(clk);
  41 }
  42 EXPORT_SYMBOL(clk_disable);
  43
  44 unsigned long clk_get_rate(struct clk *clk)
  45 {
  46         if (clk_functions.clk_get_rate)
  47                 return clk_functions.clk_get_rate(clk);
  48         return 0;
  49 }
  50 EXPORT_SYMBOL(clk_get_rate);
  51
  52 long clk_round_rate(struct clk *clk, unsigned long rate)
  53 {
  54         if (clk_functions.clk_round_rate)
  55                 return clk_functions.clk_round_rate(clk, rate);
  56         return -ENOSYS;
  57 }
  58 EXPORT_SYMBOL(clk_round_rate);
  59
  60 int clk_set_rate(struct clk *clk, unsigned long rate)
  61 {
  62         if (clk_functions.clk_set_rate)
  63                 return clk_functions.clk_set_rate(clk, rate);
  64         return -ENOSYS;
  65 }
  66 EXPORT_SYMBOL(clk_set_rate);
  67
  68 struct clk *clk_get_parent(struct clk *clk)
  69 {
  70         if (clk_functions.clk_get_parent)
  71                 return clk_functions.clk_get_parent(clk);
  72         return ERR_PTR(-ENOSYS);
  73 }
  74 EXPORT_SYMBOL(clk_get_parent);
  75
  76 int clk_set_parent(struct clk *clk, struct clk *parent)
  77 {
  78         if (clk_functions.clk_set_parent)
  79                 return clk_functions.clk_set_parent(clk, parent);
  80         return -ENOSYS;
  81 }
  82 EXPORT_SYMBOL(clk_set_parent);