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/*
* 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:
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_
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