[sensors] Ambient light sensor implementation for ChromeOS and Linux.

device/generic_sensor/iio/sensor_data_iio.h

Index: device/generic_sensor/iio/sensor_data_iio.h
diff --git a/device/generic_sensor/iio/sensor_data_iio.h b/device/generic_sensor/iio/sensor_data_iio.h
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+++ b/device/generic_sensor/iio/sensor_data_iio.h
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+// Copyright 2016 The Chromium 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 DEVICE_GENERIC_SENSOR_IIO_SENSOR_DATA_IIO_H_
+#define DEVICE_GENERIC_SENSOR_IIO_SENSOR_DATA_IIO_H_
+
+#include "device/generic_sensor/public/interfaces/sensor.mojom.h"
+
+namespace device {
+
+// This structure represents a context that is used to
+// create a type specific SensorReader and a concrete
+// sensor that uses the SensorReader to read sensor
+// data from files specified in the |sensor_file_names|.
+struct SensorDataIio {
+  // Provides a base path to all sensors.
+  const base::FilePath::CharType* base_path_sensor_iio;
+  // Provides an array of sensor file names to be searched for.
+  const char** sensor_file_names[3];
+  // Number of files in each |sensor_file_names| array.
+  size_t sensor_file_names_cols;
+  // Number of arrays in |sensor_file_names|.
+  // Corresponds to the sensor reading fields number.
+  size_t sensor_file_names_rows;
+  // Reporting mode of a sensor.
+  mojom::ReportingMode reporting_mode;
+  // Default configuration of a sensor.
+  PlatformSensorConfiguration default_configuration;
+};
+
+// Initializes a sensor type specific data.
+bool InitSensorData(mojom::SensorType type, SensorDataIio* data);
+
+}  // namespace device
+
+#endif  // DEVICE_GENERIC_SENSOR_IIO_SENSOR_DATA_IIO_H_