| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef SYSTEM_PERIPHERALMANAGER_DAEMON_LED_DRIVER_SYSFS_H_ |
| #define SYSTEM_PERIPHERALMANAGER_DAEMON_LED_DRIVER_SYSFS_H_ |
| |
| #include <stdint.h> |
| |
| #include <base/macros.h> |
| |
| #include "led_driver.h" |
| |
| namespace android { |
| |
| class LedDriverSysfs : public LedDriverInterface { |
| public: |
| explicit LedDriverSysfs(std::string* prefix); |
| ~LedDriverSysfs(); |
| |
| static std::string Compat() { return "LEDSYSFS"; } |
| |
| bool Init(const std::string& name) override; |
| bool SetBrightness(uint32_t val) override; |
| bool GetBrightness(uint32_t* val) override; |
| bool GetMaxBrightness(uint32_t* val) override; |
| |
| private: |
| bool ReadFromFile(const std::string& file, std::string* value); |
| bool WriteToFile(const std::string& file, const std::string& value); |
| |
| int fd_; |
| |
| // Used for unit test only. |
| // Ownership is in the test. |
| std::string* prefix_; |
| |
| DISALLOW_COPY_AND_ASSIGN(LedDriverSysfs); |
| }; |
| |
| } // namespace android |
| |
| #endif // SYSTEM_PERIPHERALMANAGER_DAEMON_LED_DRIVER_SYSFS_H_ |