1 /** 2 * Copyright © 2017 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 #include <string> 17 #include "fan.hpp" 18 #include "sdbusplus.hpp" 19 20 namespace phosphor 21 { 22 namespace fan 23 { 24 namespace control 25 { 26 27 // For throwing exception 28 using namespace phosphor::logging; 29 30 constexpr auto FAN_SENSOR_PATH = "/xyz/openbmc_project/sensors/fan_tach/"; 31 constexpr auto FAN_TARGET_PROPERTY = "Target"; 32 33 Fan::Fan(sdbusplus::bus::bus& bus, const FanDefinition& def): 34 _bus(bus), 35 _name(std::get<fanNamePos>(def)), 36 _interface(std::get<targetInterfacePos>(def)) 37 { 38 std::string path; 39 auto sensors = std::get<sensorListPos>(def); 40 for (auto& s : sensors) 41 { 42 path = FAN_SENSOR_PATH + s; 43 auto service = util::SDBusPlus::getService( 44 bus, 45 path, 46 _interface); 47 _sensors[path] = service; 48 } 49 // All sensors associated with this fan are set to the same target speed, 50 // so only need to read target property from one. 51 if (!path.empty()) 52 { 53 // Use getProperty with service lookup since each target sensor 54 // path given could have different services providing them 55 _targetSpeed = util::SDBusPlus::getProperty<uint64_t>( 56 bus, 57 path, 58 _interface, 59 FAN_TARGET_PROPERTY); 60 } 61 } 62 63 void Fan::setSpeed(uint64_t speed) 64 { 65 for (auto& sensor : _sensors) 66 { 67 auto value = speed; 68 try 69 { 70 util::SDBusPlus::setProperty<uint64_t>( 71 _bus, 72 sensor.second, 73 sensor.first, 74 _interface, 75 FAN_TARGET_PROPERTY, 76 std::move(value)); 77 } 78 catch (const sdbusplus::exception::SdBusError&) 79 { 80 throw util::DBusPropertyError{ 81 "DBus set property failed", 82 sensor.second, 83 sensor.first, 84 _interface, 85 FAN_TARGET_PROPERTY}; 86 } 87 } 88 89 _targetSpeed = speed; 90 } 91 92 } 93 } 94 } 95