linux-imx

/*

 *   (c) 2003-2012 Advanced Micro Devices, Inc.

 *  Your use of this code is subject to the terms and conditions of the

 *  GNU general public license version 2. See "COPYING" or

 *  http://www.gnu.org/licenses/gpl.html

 *

 *  Maintainer:

 *  Andreas Herrmann <herrmann.der.user@googlemail.com>

 *

 *  Based on the powernow-k7.c module written by Dave Jones.

 *  (C) 2003 Dave Jones on behalf of SuSE Labs

 *  (C) 2004 Dominik Brodowski <linux@brodo.de>

 *  (C) 2004 Pavel Machek <pavel@ucw.cz>

 *  Licensed under the terms of the GNU GPL License version 2.

 *  Based upon datasheets & sample CPUs kindly provided by AMD.

 *

 *  Valuable input gratefully received from Dave Jones, Pavel Machek,

 *  Dominik Brodowski, Jacob Shin, and others.

 *  Originally developed by Paul Devriendt.

 *

 *  Processor information obtained from Chapter 9 (Power and Thermal

 *  Management) of the "BIOS and Kernel Developer's Guide (BKDG) for

 *  the AMD Athlon 64 and AMD Opteron Processors" and section "2.x

 *  Power Management" in BKDGs for newer AMD CPU families.

 *

 *  Tables for specific CPUs can be inferred from AMD's processor

 *  power and thermal data sheets, (e.g. 30417.pdf, 30430.pdf, 43375.pdf)

 */

​

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

​

#include <linux/kernel.h>

#include <linux/smp.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/cpufreq.h>

#include <linux/slab.h>

#include <linux/string.h>

#include <linux/cpumask.h>

#include <linux/io.h>

#include <linux/delay.h>

​

#include <asm/msr.h>

#include <asm/cpu_device_id.h>

​

#include <linux/acpi.h>

#include <linux/mutex.h>

#include <acpi/processor.h>

​

#define VERSION "version 2.20.00"

#include "powernow-k8.h"

​

/* serialize freq changes  */

static DEFINE_MUTEX(fidvid_mutex);

​

static DEFINE_PER_CPU(struct powernow_k8_data *, powernow_data);

​

static struct cpufreq_driver cpufreq_amd64_driver;

​

/* Return a frequency in MHz, given an input fid */

static u32 find_freq_from_fid(u32 fid)

{

    return 800 + (fid * 100);