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

   1/*
   2 *  linux/arch/arm/mach-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/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/clkdev.h>
  22#include <asm/hardware/icst307.h>
  23
  24#include "clock.h"
  25
  26int clk_enable(struct clk *clk)
  27{
  28        return 0;
  29}
  30EXPORT_SYMBOL(clk_enable);
  31
  32void clk_disable(struct clk *clk)
  33{
  34}
  35EXPORT_SYMBOL(clk_disable);
  36
  37unsigned long clk_get_rate(struct clk *clk)
  38{
  39        return clk->rate;
  40}
  41EXPORT_SYMBOL(clk_get_rate);
  42
  43long clk_round_rate(struct clk *clk, unsigned long rate)
  44{
  45        struct icst307_vco vco;
  46        vco = icst307_khz_to_vco(clk->params, rate / 1000);
  47        return icst307_khz(clk->params, vco) * 1000;
  48}
  49EXPORT_SYMBOL(clk_round_rate);
  50
  51int clk_set_rate(struct clk *clk, unsigned long rate)
  52{
  53        int ret = -EIO;
  54
  55        if (clk->setvco) {
  56                struct icst307_vco vco;
  57
  58                vco = icst307_khz_to_vco(clk->params, rate / 1000);
  59                clk->rate = icst307_khz(clk->params, vco) * 1000;
  60                clk->setvco(clk, vco);
  61                ret = 0;
  62        }
  63        return ret;
  64}
  65EXPORT_SYMBOL(clk_set_rate);
  66