SAFE public projects git trees. - safe/jmp/linux-2.6/blob - arch/arm/plat-versatile/clock.c

   1 /*
   2  *  linux/arch/arm/plat-versatile/clock.c
   3  *
   4  *  Copyright (C) 2004 ARM Limited.
   5  *  Written by Deep Blue Solutions Limited.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11 #include <linux/module.h>
  12 #include <linux/kernel.h>
  13 #include <linux/errno.h>
  14 #include <linux/clk.h>
  15 #include <linux/mutex.h>
  16
  17 #include <asm/hardware/icst.h>
  18
  19 #include <mach/clkdev.h>
  20
  21 int clk_enable(struct clk *clk)
  22 {
  23         return 0;
  24 }
  25 EXPORT_SYMBOL(clk_enable);
  26
  27 void clk_disable(struct clk *clk)
  28 {
  29 }
  30 EXPORT_SYMBOL(clk_disable);
  31
  32 unsigned long clk_get_rate(struct clk *clk)
  33 {
  34         return clk->rate;
  35 }
  36 EXPORT_SYMBOL(clk_get_rate);
  37
  38 long clk_round_rate(struct clk *clk, unsigned long rate)
  39 {
  40         struct icst_vco vco;
  41         vco = icst_hz_to_vco(clk->params, rate);
  42         return icst_hz(clk->params, vco);
  43 }
  44 EXPORT_SYMBOL(clk_round_rate);
  45
  46 int clk_set_rate(struct clk *clk, unsigned long rate)
  47 {
  48         int ret = -EIO;
  49
  50         if (clk->setvco) {
  51                 struct icst_vco vco;
  52
  53                 vco = icst_hz_to_vco(clk->params, rate);
  54                 clk->rate = icst_hz(clk->params, vco);
  55                 clk->setvco(clk, vco);
  56                 ret = 0;
  57         }
  58         return ret;
  59 }
  60 EXPORT_SYMBOL(clk_set_rate);