1 /** 2 * Copyright © 2019 IBM Corporation 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "sysfs.hpp" 18 19 #include <fstream> 20 #include <iostream> 21 #include <string> 22 23 namespace fs = std::filesystem; 24 25 namespace phosphor 26 { 27 namespace led 28 { 29 template <typename T> 30 T getSysfsAttr(const fs::path& path); 31 32 template <> 33 std::string getSysfsAttr(const fs::path& path) 34 { 35 std::string content; 36 std::ifstream file(path); 37 file >> content; 38 return content; 39 } 40 41 template <> 42 unsigned long getSysfsAttr(const fs::path& path) 43 { 44 std::string content = getSysfsAttr<std::string>(path); 45 return std::strtoul(content.c_str(), nullptr, 0); 46 } 47 48 template <typename T> 49 void setSysfsAttr(const fs::path& path, const T& value) 50 { 51 std::ofstream file(path); 52 file << value; 53 } 54 55 unsigned long SysfsLed::getBrightness() 56 { 57 return getSysfsAttr<unsigned long>(root / attrBrightness); 58 } 59 60 void SysfsLed::setBrightness(unsigned long brightness) 61 { 62 setSysfsAttr<unsigned long>(root / attrBrightness, brightness); 63 } 64 65 unsigned long SysfsLed::getMaxBrightness() 66 { 67 return getSysfsAttr<unsigned long>(root / attrMaxBrightness); 68 } 69 70 std::string SysfsLed::getTrigger() 71 { 72 return getSysfsAttr<std::string>(root / attrTrigger); 73 } 74 75 void SysfsLed::setTrigger(const std::string& trigger) 76 { 77 setSysfsAttr<std::string>(root / attrTrigger, trigger); 78 } 79 80 unsigned long SysfsLed::getDelayOn() 81 { 82 return getSysfsAttr<unsigned long>(root / attrDelayOn); 83 } 84 85 void SysfsLed::setDelayOn(unsigned long ms) 86 { 87 setSysfsAttr<unsigned long>(root / attrDelayOn, ms); 88 } 89 90 unsigned long SysfsLed::getDelayOff() 91 { 92 return getSysfsAttr<unsigned long>(root / attrDelayOff); 93 } 94 95 void SysfsLed::setDelayOff(unsigned long ms) 96 { 97 setSysfsAttr<unsigned long>(root / attrDelayOff, ms); 98 } 99 } // namespace led 100 } // namespace phosphor 101