| /* |
| * 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_GPIO_DRIVER_SYSFS_H_ |
| #define SYSTEM_PERIPHERALMANAGER_DAEMON_GPIO_DRIVER_SYSFS_H_ |
| |
| #include <stdint.h> |
| |
| #include <base/macros.h> |
| |
| #include "gpio_driver.h" |
| |
| namespace android { |
| |
| class GpioDriverSysfs : public GpioDriverInterface { |
| public: |
| explicit GpioDriverSysfs(void* arg); |
| ~GpioDriverSysfs(); |
| |
| static std::string Compat() { return "GPIOSYSFS"; } |
| |
| bool Init(uint32_t index) override; |
| |
| // Gpio Driver interface. |
| bool SetValue(bool val) override; |
| bool GetValue(bool* val) override; |
| bool SetActiveType(GpioActiveType type) override; |
| bool SetDirection(GpioDirection direction) override; |
| bool SetEdgeType(GpioEdgeType type) override; |
| bool GetPollingFd(::android::base::unique_fd* fd) override; |
| |
| private: |
| bool Enable(); |
| bool Disable(); |
| bool ExportGpio(uint32_t index); |
| bool WriteToFile(const std::string& file, const std::string& value); |
| bool ReadFromFile(const std::string& file, std::string* value); |
| |
| int fd_; |
| |
| DISALLOW_COPY_AND_ASSIGN(GpioDriverSysfs); |
| }; |
| |
| } // namespace android |
| |
| #endif // SYSTEM_PERIPHERALMANAGER_DAEMON_GPIO_DRIVER_SYSFS_H_ |