linux-imx

/*

 *  fair_share.c - A simple weight based Thermal governor

 *

 *  Copyright (C) 2012 Intel Corp

 *  Copyright (C) 2012 Durgadoss R <durgadoss.r@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; version 2 of the License.

 *

 *  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.

 *

 *  You should have received a copy of the GNU General Public License along

 *  with this program; if not, write to the Free Software Foundation, Inc.,

 *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

 *

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

 */

​

#include <linux/thermal.h>

#include <trace/events/thermal.h>

​

#include "thermal_core.h"

​

/**

 * get_trip_level: - obtains the current trip level for a zone

 * @tz:     thermal zone device

 */

static int get_trip_level(struct thermal_zone_device *tz)

{

    int count = 0;

    int trip_temp;

    enum thermal_trip_type trip_type;

​

    if (tz->trips == 0 || !tz->ops->get_trip_temp)

        return 0;

​

    for (count = 0; count < tz->trips; count++) {

        tz->ops->get_trip_temp(tz, count, &trip_temp);

        if (tz->temperature < trip_temp)

            break;

    }

​

    /*

     * count > 0 only if temperature is greater than first trip

     * point, in which case, trip_point = count - 1

     */

    if (count > 0) {

        tz->ops->get_trip_type(tz, count - 1, &trip_type);

        trace_thermal_zone_trip(tz, count - 1, trip_type);

    }

​

    return count;

}

​

static long get_target_state(struct thermal_zone_device *tz,

        struct thermal_cooling_device *cdev, int percentage, int level)

{