linux-imx

/*

 * cpufreq driver for Enhanced SpeedStep, as found in Intel's Pentium

 * M (part of the Centrino chipset).

 *

 * Since the original Pentium M, most new Intel CPUs support Enhanced

 * SpeedStep.

 *

 * Despite the "SpeedStep" in the name, this is almost entirely unlike

 * traditional SpeedStep.

 *

 * Modelled on speedstep.c

 *

 * Copyright (C) 2003 Jeremy Fitzhardinge <jeremy@goop.org>

 */

​

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

​

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/cpufreq.h>

#include <linux/sched.h>    /* current */

#include <linux/delay.h>

#include <linux/compiler.h>

#include <linux/gfp.h>

​

#include <asm/msr.h>

#include <asm/processor.h>

#include <asm/cpufeature.h>

#include <asm/cpu_device_id.h>

​

#define MAINTAINER  "linux-pm@vger.kernel.org"

​

#define INTEL_MSR_RANGE (0xffff)

​

struct cpu_id

{

    __u8    x86;            /* CPU family */

    __u8    x86_model;  /* model */

    __u8    x86_stepping;   /* stepping */

};

​

enum {

    CPU_BANIAS,

    CPU_DOTHAN_A1,

    CPU_DOTHAN_A2,

    CPU_DOTHAN_B0,

    CPU_MP4HT_D0,

    CPU_MP4HT_E0,

};

​

static const struct cpu_id cpu_ids[] = {

    [CPU_BANIAS]    = { 6,  9, 5 },

    [CPU_DOTHAN_A1] = { 6, 13, 1 },

    [CPU_DOTHAN_A2] = { 6, 13, 2 },

    [CPU_DOTHAN_B0] = { 6, 13, 6 },

    [CPU_MP4HT_D0]  = {15,  3, 4 },

    [CPU_MP4HT_E0]  = {15,  4, 1 },

};

#define N_IDS   ARRAY_SIZE(cpu_ids)

​

struct cpu_model

{