arch/arm/mach-integrator/clock.c

   1 /*
   2  *  linux/arch/arm/mach-integrator/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/clkdev.h>
  18 #include <mach/clkdev.h>
  19
  20 int clk_enable(struct clk *clk)
  21 {
  22         return 0;
  23 }
  24 EXPORT_SYMBOL(clk_enable);
  25
  26 void clk_disable(struct clk *clk)
  27 {
  28 }
  29 EXPORT_SYMBOL(clk_disable);
  30
  31 unsigned long clk_get_rate(struct clk *clk)
  32 {
  33         return clk->rate;
  34 }
  35 EXPORT_SYMBOL(clk_get_rate);
  36
  37 long clk_round_rate(struct clk *clk, unsigned long rate)
  38 {
  39         struct icst525_vco vco;
  40         vco = icst525_khz_to_vco(clk->params, rate / 1000);
  41         return icst525_khz(clk->params, vco) * 1000;
  42 }
  43 EXPORT_SYMBOL(clk_round_rate);
  44
  45 int clk_set_rate(struct clk *clk, unsigned long rate)
  46 {
  47         int ret = -EIO;
  48
  49         if (clk->setvco) {
  50                 struct icst525_vco vco;
  51
  52                 vco = icst525_khz_to_vco(clk->params, rate / 1000);
  53                 clk->rate = icst525_khz(clk->params, vco) * 1000;
  54                 clk->setvco(clk, vco);
  55                 ret = 0;
  56         }
  57         return ret;
  58 }
  59 EXPORT_SYMBOL(clk_set_rate);