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

device/generic_sensor/iio/sensor_data_iio.h

+// 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_SENSOR_DATA_IIO_H_
+#define DEVICE_GENERIC_SENSOR_SENSOR_DATA_IIO_H_

[Mikhail, 2016/10/14 13:59:04]

looks like it's better to create 'iio' folder and put it and other aux stuff
there

[maksims (do not use this acc), 2016/10/17 06:06:59]

It's already there. Haven't changed the string here.

+
+#include "device/generic_sensor/public/interfaces/sensor.mojom.h"
+
+namespace device {
+
+namespace {
+
+const char kBasePathSensorIio[] = FILE_PATH_LITERAL("/sys/bus/iio/devices");

[Mikhail, 2016/10/14 13:59:04]

Declaring them like this would cause copying in every .cc that will include this
header.
make them static struct members.

[maksims (do not use this acc), 2016/10/17 06:06:59]

Done.

+
+const size_t kMaxRows = 3;
+
+}  // namespace
+
+struct SensorDataIio {
+  const char* base_path_sensor_iio = kBasePathSensorIio;
+  const char** sensor_file_names[kMaxRows];
+  size_t sensor_file_names_cols;
+  size_t sensor_file_names_rows;
+  mojom::ReportingMode reporting_mode;
+  PlatformSensorConfiguration default_configuration;
+};
+
+bool CreateSensorData(mojom::SensorType type, SensorDataIio* data);
+
+}  // namespace device
+
+#endif  // DEVICE_GENERIC_SENSOR_SENSOR_DATA_IIO_H_