hwmon_temperature_sensor.h

// Copyright 2015 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef THERMALD_HWMON_TEMPERATURE_SENSOR_H_
#define THERMALD_HWMON_TEMPERATURE_SENSOR_H_

#include <string>

#include "base/files/file_path.h"
#include "base/macros.h"

#include "thermald/temperature_sensor_common.h"

namespace thermald {

// Class to read the temperature from a Linux hwmon sensor:
//
// https://www.kernel.org/doc/Documentation/hwmon/sysfs-interface
class HwmonTemperatureSensor : public TemperatureSensorCommon {
 public:
  // Construct a hwmon sensor with a custom name.
  HwmonTemperatureSensor(int hwmon_dev_id, int sensor_id,
                         const std::string &name);

  // Construct a hwmon sensor with the default name.
  // The name of the sensor will be hwmon<dev id>.temp<sensor id>
  HwmonTemperatureSensor(int hwmon_dev_id, int sensor_id);

  // Read the temperature from the sensor.
  bool ReadTemperature(int *value) override;

 private:
  const base::FilePath sysfs_attr_input_;

  DISALLOW_COPY_AND_ASSIGN(HwmonTemperatureSensor);
};

}  // namespace thermald

#endif  // THERMALD_HWMON_TEMPERATURE_SENSOR_H_