126b815faSBrad Bishop #pragma once 26292aeedSMatthew Barth 3754d38cfSBrad Bishop #include <chrono> 43b8e36e2SMatt Spinler #include <exception> 56292aeedSMatthew Barth #include <fstream> 66292aeedSMatthew Barth #include <string> 76292aeedSMatthew Barth 8043d3230SPatrick Venture namespace sysfs 9043d3230SPatrick Venture { 101e6324faSPatrick Venture 11a9b5f05bSBrad Bishop inline std::string make_sysfs_path(const std::string& path, 126292aeedSMatthew Barth const std::string& type, 136292aeedSMatthew Barth const std::string& id, 146292aeedSMatthew Barth const std::string& entry) 156292aeedSMatthew Barth { 166292aeedSMatthew Barth using namespace std::literals; 176292aeedSMatthew Barth 18043d3230SPatrick Venture if (entry.empty()) 19043d3230SPatrick Venture { 209331ab78SPatrick Venture return path + "/"s + type + id; 219331ab78SPatrick Venture } 229331ab78SPatrick Venture 236292aeedSMatthew Barth return path + "/"s + type + id + "_"s + entry; 246292aeedSMatthew Barth } 256292aeedSMatthew Barth 26f4bf63adSBrad Bishop /** @brief Return the path to the phandle file matching value in io-channels. 27f4bf63adSBrad Bishop * 28f4bf63adSBrad Bishop * This function will take two passed in paths. 29f4bf63adSBrad Bishop * One path is used to find the io-channels file. 30f4bf63adSBrad Bishop * The other path is used to find the phandle file. 31f4bf63adSBrad Bishop * The 4 byte phandle value is read from the phandle file(s). 32f4bf63adSBrad Bishop * The 4 byte phandle value and 4 byte index value is read from io-channels. 33f4bf63adSBrad Bishop * When a match is found, the path to the matching phandle file is returned. 34f4bf63adSBrad Bishop * 35f4bf63adSBrad Bishop * @param[in] iochanneldir - Path to file for getting phandle from io-channels 36f4bf63adSBrad Bishop * @param[in] phandledir - Path to use for reading from phandle file 37f4bf63adSBrad Bishop * 38f4bf63adSBrad Bishop * @return Path to phandle file with value matching that in io-channels 39f4bf63adSBrad Bishop */ 40043d3230SPatrick Venture std::string findPhandleMatch(const std::string& iochanneldir, 41f4bf63adSBrad Bishop const std::string& phandledir); 42613a5b37SBrad Bishop 4331dbe062SMatt Spinler /** @brief Find hwmon instances from an open-firmware device tree path 44613a5b37SBrad Bishop * 45613a5b37SBrad Bishop * Look for a matching hwmon instance given an 46613a5b37SBrad Bishop * open firmware device path. 47613a5b37SBrad Bishop * 48613a5b37SBrad Bishop * @param[in] ofNode- The open firmware device path. 49613a5b37SBrad Bishop * 50613a5b37SBrad Bishop * @returns[in] - The hwmon instance path or an empty 51613a5b37SBrad Bishop * string if no match is found. 52613a5b37SBrad Bishop */ 53*5c014d2bSMatt Spinler std::string findHwmonFromOFPath(const std::string& ofNode); 54613a5b37SBrad Bishop 55626df17aSMatt Spinler /** @brief Find hwmon instances from a device path 56626df17aSMatt Spinler * 57626df17aSMatt Spinler * Look for a matching hwmon instance given a device path that 58626df17aSMatt Spinler * starts with /devices. This path is the DEVPATH udev attribute 59626df17aSMatt Spinler * for the device except it has the '/hwmon/hwmonN' stripped off. 60626df17aSMatt Spinler * 61626df17aSMatt Spinler * @param[in] devPath - The device path. 62626df17aSMatt Spinler * 63626df17aSMatt Spinler * @return - The hwmon instance path or an empty 64626df17aSMatt Spinler * string if no match is found. 65626df17aSMatt Spinler */ 66*5c014d2bSMatt Spinler std::string findHwmonFromDevPath(const std::string& devPath); 67626df17aSMatt Spinler 68431d26a5SBrad Bishop /** @brief Return the path to use for a call out. 69431d26a5SBrad Bishop * 70431d26a5SBrad Bishop * Return an empty string if a callout path cannot be 71431d26a5SBrad Bishop * found. 72431d26a5SBrad Bishop * 73431d26a5SBrad Bishop * @param[in] instancePath - /sys/class/hwmon/hwmon<N> path. 74431d26a5SBrad Bishop * 75431d26a5SBrad Bishop * @return Path to use for call out 76431d26a5SBrad Bishop */ 77431d26a5SBrad Bishop std::string findCalloutPath(const std::string& instancePath); 78431d26a5SBrad Bishop 79dd467396SPatrick Venture } // namespace sysfs 801e6324faSPatrick Venture 8103476f11SBrad Bishop // vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4 82