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/*
* Copyright 2010, Intel Corporation
*
* This file is part of PowerTOP
*
* This program file 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 in a file named COPYING; if not, write to the
* Free Software Foundation, Inc,
* 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
* or just google for it.
*
* Authors:
* Arjan van de Ven <arjan@linux.intel.com>
*/
#include <iostream>
#include <fstream>
#include <stdio.h>
#include <sys/types.h>
#include <dirent.h>
#include <math.h>
#include <unistd.h>
#include <limits.h>
#include "../lib.h"
#include "device.h"
#include "thinkpad-light.h"
#include "../parameters/parameters.h"
#include "../process/powerconsumer.h"
#include <string.h>
#include <unistd.h>
thinkpad_light::thinkpad_light(): device()
{
start_rate = 0;
end_rate = 0;
light_index = get_param_index("thinkpad-light");
r_index = get_result_index("thinkpad-light");
register_sysfs_path("/sys/devices/platform/thinkpad_acpi/leds/tpacpi::thinklight");
}
void thinkpad_light::start_measurement(void)
{
/* read the rpms of the light */
start_rate = read_sysfs("/sys/devices/platform/thinkpad_acpi/leds/tpacpi::thinklight/brightness");
}
void thinkpad_light::end_measurement(void)
{
end_rate = read_sysfs("/sys/devices/platform/thinkpad_acpi/leds/tpacpi::thinklight/brightness");
report_utilization("thinkpad-light", utilization());
}
double thinkpad_light::utilization(void)
{
return (start_rate+end_rate) / 2.55 / 2.0;
}
void create_thinkpad_light(void)
{
char filename[PATH_MAX];
class thinkpad_light *light;
pt_strcpy(filename, "/sys/devices/platform/thinkpad_acpi/leds/tpacpi::thinklight/brightness");
if (access(filename, R_OK) !=0)
return;
register_parameter("thinkpad-light", 10);
light = new class thinkpad_light();
all_devices.push_back(light);
}
double thinkpad_light::power_usage(struct result_bundle *result, struct parameter_bundle *bundle)
{
double power;
double factor;
double util;
power = 0;
util = get_result_value(r_index, result);
if (util < 0)
util = 0;
factor = get_parameter_value(light_index, bundle) - 10.0;
power += util / 100.0 * factor;
if (power <= 0.0)
power = 0.0;
return power;
}
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