1 /* 2 // Copyright (c) 2018 Intel 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 #pragma once 17 18 #include <nlohmann/json.hpp> 19 #include <sdbusplus/bus.hpp> 20 21 #include <string> 22 #include <vector> 23 24 // this struct has the gpio config for single gpio 25 struct gpioInfo 26 { 27 int fd; // io fd mapped with the gpio 28 uint32_t number; 29 std::string direction; 30 }; 31 32 // this struct represents button interface 33 struct buttonConfig 34 { 35 std::string formFactorName; // name of the button interface 36 std::vector<gpioInfo> gpios; // holds single or group gpio config 37 nlohmann::json extraJsonInfo; // corresponding to button interface 38 }; 39 40 /** 41 * @brief iterates over the list of gpios and configures gpios them 42 * config which is set from gpio defs json file. 43 * The fd of the configured gpio is stored in buttonConfig.gpios container 44 * @return int returns 0 on successful config of all gpios 45 */ 46 47 int configGroupGpio(buttonConfig& buttonCfg); 48 49 /** 50 * @brief configures and initializes the single gpio 51 * @return int returns 0 on successful config of all gpios 52 */ 53 54 int configGpio(gpioInfo& gpioConfig); 55 56 uint32_t getGpioNum(const std::string& gpioPin); 57 void closeGpio(int fd); 58 // global json object which holds gpio_defs.json configs 59 extern nlohmann::json gpioDefs; 60