LXR linux/arch/arm/mach-realview/clock.c

   1/*
   2 *  linux/arch/arm/mach-realview/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/device.h>
  14#include <linux/list.h>
  15#include <linux/errno.h>
  16#include <linux/err.h>
  17#include <linux/string.h>
  18#include <linux/clk.h>
  19#include <linux/mutex.h>
  20
  21#include <asm/hardware/icst307.h>
  22
  23#include "clock.h"
  24
  25int clk_enable(struct clk *clk)
  26{
  27        return 0;
  28}
  29EXPORT_SYMBOL(clk_enable);
  30
  31void clk_disable(struct clk *clk)
  32{
  33}
  34EXPORT_SYMBOL(clk_disable);
  35
  36unsigned long clk_get_rate(struct clk *clk)
  37{
  38        return clk->rate;
  39}
  40EXPORT_SYMBOL(clk_get_rate);
  41
  42long clk_round_rate(struct clk *clk, unsigned long rate)
  43{
  44        struct icst307_vco vco;
  45        vco = icst307_khz_to_vco(clk->params, rate / 1000);
  46        return icst307_khz(clk->params, vco) * 1000;
  47}
  48EXPORT_SYMBOL(clk_round_rate);
  49
  50int clk_set_rate(struct clk *clk, unsigned long rate)
  51{
  52        int ret = -EIO;
  53
  54        if (clk->setvco) {
  55                struct icst307_vco vco;
  56
  57                vco = icst307_khz_to_vco(clk->params, rate / 1000);
  58                clk->rate = icst307_khz(clk->params, vco) * 1000;
  59                clk->setvco(clk, vco);
  60                ret = 0;
  61        }
  62        return ret;
  63}
  64EXPORT_SYMBOL(clk_set_rate);
  65