Index: device/generic_sensor/ambient_light_reader_iio.cc |
diff --git a/device/generic_sensor/ambient_light_reader_iio.cc b/device/generic_sensor/ambient_light_reader_iio.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..9a62c33e5ccee1aa24695f54066422a4d16fd6b5 |
--- /dev/null |
+++ b/device/generic_sensor/ambient_light_reader_iio.cc |
@@ -0,0 +1,60 @@ |
+// Copyright 2015 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. |
+ |
+#include "device/generic_sensor/ambient_light_reader_iio.h" |
+ |
+#include "base/files/file_enumerator.h" |
+#include "base/files/file_util.h" |
+#include "base/strings/string_number_conversions.h" |
+#include "base/strings/string_util.h" |
+ |
+namespace device { |
+ |
+namespace { |
+ |
+// Base path where sensors are located. |
+const base::FilePath::CharType kAmbientLightIioBasePath[] = |
Mikhail
2016/10/11 14:46:46
better make it a constructor argument than hide he
maksims (do not use this acc)
2016/10/14 12:31:44
Done.
|
+ FILE_PATH_LITERAL("/sys/bus/iio/devices"); |
+ |
+} // namespace |
+ |
+AmbientLightSensorReaderIio::AmbientLightSensorReaderIio() = default; |
+AmbientLightSensorReaderIio::~AmbientLightSensorReaderIio() = default; |
+ |
+bool AmbientLightSensorReaderIio::ReadSensorLuxValue(double* lux) { |
+ *lux = std::numeric_limits<double>::infinity(); |
Mikhail
2016/10/11 14:46:46
you should not modify the output parameter on call
maksims (do not use this acc)
2016/10/14 12:31:44
Done.
|
+ std::string value; |
+ if (!base::ReadFileToString(sensor_path_, &value)) |
Mikhail
2016/10/11 14:46:46
how do you know if 'sensor_path_' has been initial
maksims (do not use this acc)
2016/10/14 12:31:45
Right now, sensor_paths_ is a vector of path. If i
|
+ return false; |
+ |
+ base::TrimWhitespaceASCII(value, base::TRIM_ALL, &value); |
+ if (!base::StringToDouble(value, lux)) |
+ return false; |
+ return true; |
+} |
+ |
+bool AmbientLightSensorReaderIio::DetectLightSensor() { |
Mikhail
2016/10/11 14:46:46
should be renamed to smth like 'InitLightSensorPat
maksims (do not use this acc)
2016/10/14 12:31:45
Done.
|
+ // Search the iio/devices directory for a subdirectory (eg "device0" or |
+ // "iio:device0") that contains the "[in_]illuminance[0]_{input|raw}" file. |
+ base::FileEnumerator dir_enumerator(base::FilePath(kAmbientLightIioBasePath), |
+ false, base::FileEnumerator::DIRECTORIES); |
+ const char* input_names[] = { |
+ "in_illuminance0_input", "in_illuminance_input", "in_illuminance0_raw", |
+ "in_illuminance_raw", "illuminance0_input", |
+ }; |
+ |
+ for (base::FilePath check_path = dir_enumerator.Next(); !check_path.empty(); |
+ check_path = dir_enumerator.Next()) { |
+ for (unsigned int i = 0; i < arraysize(input_names); i++) { |
Mikhail
2016/10/11 14:46:46
nit: ++i
Mikhail
2016/10/11 14:46:46
s/unsigned int/uint32_t
|
+ base::FilePath als_path = check_path.Append(input_names[i]); |
+ if (base::PathExists(als_path)) { |
+ sensor_path_ = als_path; |
+ return true; |
+ } |
+ } |
+ } |
+ return false; |
+} |
+ |
+} // namespace content |