linux-imx

/*

 *  acpi_fan.c - ACPI Fan Driver ($Revision: 29 $)

 *

 *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>

 *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>

 *

 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 *

 *  This program is free software; you can redistribute it and/or modify

 *  it under the terms of the GNU General Public License as published by

 *  the Free Software Foundation; either version 2 of the License, or (at

 *  your option) any later version.

 *

 *  This program is distributed in the hope that it will be useful, but

 *  WITHOUT ANY WARRANTY; without even the implied warranty of

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 *  General Public License for more details.

 *

 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 */

​

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/types.h>

#include <linux/uaccess.h>

#include <linux/thermal.h>

#include <linux/acpi.h>

#include <linux/platform_device.h>

#include <linux/sort.h>

​

MODULE_AUTHOR("Paul Diefenbaugh");

MODULE_DESCRIPTION("ACPI Fan Driver");

MODULE_LICENSE("GPL");

​

static int acpi_fan_probe(struct platform_device *pdev);

static int acpi_fan_remove(struct platform_device *pdev);

​

static const struct acpi_device_id fan_device_ids[] = {

    {"PNP0C0B", 0},

    {"INT3404", 0},

    {"", 0},

};

MODULE_DEVICE_TABLE(acpi, fan_device_ids);

​

#ifdef CONFIG_PM_SLEEP

static int acpi_fan_suspend(struct device *dev);

static int acpi_fan_resume(struct device *dev);

static const struct dev_pm_ops acpi_fan_pm = {

    .resume = acpi_fan_resume,

    .freeze = acpi_fan_suspend,

    .thaw = acpi_fan_resume,

    .restore = acpi_fan_resume,

};

#define FAN_PM_OPS_PTR (&acpi_fan_pm)

#else

#define FAN_PM_OPS_PTR NULL

#endif

​

struct acpi_fan_fps {

    u64 control;

    u64 trip_point;

    u64 speed;

    u64 noise_level;

    u64 power;

};

​

struct acpi_fan_fif {

    u64 revision;

    u64 fine_grain_ctrl;

    u64 step_size;

    u64 low_speed_notification;

};

​

struct acpi_fan {

    bool acpi4;

    struct acpi_fan_fif fif;

    struct acpi_fan_fps *fps;

    int fps_count;

    struct thermal_cooling_device *cdev;

};

​

static struct platform_driver acpi_fan_driver = {

    .probe = acpi_fan_probe,

    .remove = acpi_fan_remove,

    .driver = {

        .name = "acpi-fan",

        .acpi_match_table = fan_device_ids,

        .pm = FAN_PM_OPS_PTR,

    },

};

​