phosphor-power-supply/power_supply.cpp - openbmc/phosphor-power - Gitiles

 #include "config.h"

 #include "power_supply.hpp"

 #include "types.hpp"
 #include "util.hpp"

 #include <fmt/format.h>

 #include <xyz/openbmc_project/Common/Device/error.hpp>

 #include <chrono>  // sleep_for()
 #include <cstdint> // uint8_t...
 #include <fstream>
 #include <thread> // sleep_for()

 namespace phosphor::power::psu
 {
 // Amount of time in milliseconds to delay between power supply going from
 // missing to present before running the bind command(s).
 constexpr auto bindDelay = 1000;

 using namespace phosphor::logging;
 using namespace sdbusplus::xyz::openbmc_project::Common::Device::Error;

 PowerSupply::PowerSupply(sdbusplus::bus::bus& bus, const std::string& invpath,
                          std::uint8_t i2cbus, std::uint16_t i2caddr,
                          const std::string& gpioLineName) :
     bus(bus),
     inventoryPath(invpath), bindPath("/sys/bus/i2c/drivers/ibm-cffps")
 {
     if (inventoryPath.empty())
     {
         throw std::invalid_argument{"Invalid empty inventoryPath"};
     }

     if (gpioLineName.empty())
     {
         throw std::invalid_argument{"Invalid empty gpioLineName"};
     }

     log<level::DEBUG>(fmt::format("gpioLineName: {}", gpioLineName).c_str());
     presenceGPIO = createGPIO(gpioLineName);

     std::ostringstream ss;
     ss << std::hex << std::setw(4) << std::setfill('0') << i2caddr;
     std::string addrStr = ss.str();
     std::string busStr = std::to_string(i2cbus);
     bindDevice = busStr;
     bindDevice.append("-");
     bindDevice.append(addrStr);

     pmbusIntf = phosphor::pmbus::createPMBus(i2cbus, addrStr);

     // Get the current state of the Present property.
     try
     {
         updatePresenceGPIO();
     }
     catch (...)
     {
         // If the above attempt to use the GPIO failed, it likely means that the
         // GPIOs are in use by the kernel, meaning it is using gpio-keys.
         // So, I should rely on phosphor-gpio-presence to update D-Bus, and
         // work that way for power supply presence.
         presenceGPIO = nullptr;
         // Setup the functions to call when the D-Bus inventory path for the
         // Present property changes.
         presentMatch = std::make_unique<sdbusplus::bus::match_t>(
             bus,
             sdbusplus::bus::match::rules::propertiesChanged(inventoryPath,
                                                             INVENTORY_IFACE),
             [this](auto& msg) { this->inventoryChanged(msg); });

         presentAddedMatch = std::make_unique<sdbusplus::bus::match_t>(
             bus,
             sdbusplus::bus::match::rules::interfacesAdded() +
                 sdbusplus::bus::match::rules::argNpath(0, inventoryPath),
             [this](auto& msg) { this->inventoryAdded(msg); });

         updatePresence();
         updateInventory();
     }
 }

 void PowerSupply::bindOrUnbindDriver(bool present)
 {
     auto action = (present) ? "bind" : "unbind";
     auto path = bindPath / action;

     if (present)
     {
         log<level::INFO>(
             fmt::format("Binding device driver. path: {} device: {}",
                         path.string(), bindDevice)
                 .c_str());
     }
     else
     {
         log<level::INFO>(
             fmt::format("Unbinding device driver. path: {} device: {}",
                         path.string(), bindDevice)
                 .c_str());
     }

     std::ofstream file;

     file.exceptions(std::ofstream::failbit | std::ofstream::badbit |
                     std::ofstream::eofbit);

     try
     {
         file.open(path);
         file << bindDevice;
         file.close();
     }
     catch (const std::exception& e)
     {
         auto err = errno;

         log<level::ERR>(
             fmt::format("Failed binding or unbinding device. errno={}", err)
                 .c_str());
     }
 }

 void PowerSupply::updatePresence()
 {
     try
     {
         present = getPresence(bus, inventoryPath);
     }
     catch (const sdbusplus::exception::exception& e)
     {
         // Relying on property change or interface added to retry.
         // Log an informational trace to the journal.
         log<level::INFO>(
             fmt::format("D-Bus property {} access failure exception",
                         inventoryPath)
                 .c_str());
     }
 }

 void PowerSupply::updatePresenceGPIO()
 {
     bool presentOld = present;

     try
     {
         if (presenceGPIO->read() > 0)
         {
             present = true;
         }
         else
         {
             present = false;
         }
     }
     catch (const std::exception& e)
     {
         log<level::ERR>(
             fmt::format("presenceGPIO read fail: {}", e.what()).c_str());
         throw;
     }

     if (presentOld != present)
     {
         log<level::DEBUG>(
             fmt::format("presentOld: {} present: {}", presentOld, present)
                 .c_str());
         if (present)
         {
             std::this_thread::sleep_for(std::chrono::milliseconds(bindDelay));
             bindOrUnbindDriver(present);
             pmbusIntf->findHwmonDir();
             onOffConfig(phosphor::pmbus::ON_OFF_CONFIG_CONTROL_PIN_ONLY);
             clearFaults();
         }
         else
         {
             bindOrUnbindDriver(present);
         }

         auto invpath = inventoryPath.substr(strlen(INVENTORY_OBJ_PATH));
         auto const lastSlashPos = invpath.find_last_of('/');
         std::string prettyName = invpath.substr(lastSlashPos + 1);
         setPresence(bus, invpath, present, prettyName);
         updateInventory();
     }
 }

 void PowerSupply::analyze()
 {
     using namespace phosphor::pmbus;

     if (presenceGPIO)
     {
         updatePresenceGPIO();
     }

     if ((present) && (readFail < LOG_LIMIT))
     {
         try
         {
             statusWord = pmbusIntf->read(STATUS_WORD, Type::Debug);
             // Read worked, reset the fail count.
             readFail = 0;

             if (statusWord)
             {
                 statusMFR = pmbusIntf->read(STATUS_MFR, Type::Debug);
                 if (statusWord & status_word::INPUT_FAULT_WARN)
                 {
                     if (!inputFault)
                     {
                         log<level::INFO>(fmt::format("INPUT fault: "
                                                      "status word = {:#04x}, "
                                                      "MFR fault = {:#02x}",
                                                      statusWord, statusMFR)
                                              .c_str());
                     }

                     faultFound = true;
                     inputFault = true;
                 }

                 if (statusWord & status_word::MFR_SPECIFIC_FAULT)
                 {
                     if (!mfrFault)
                     {
                         log<level::ERR>(fmt::format("MFR fault: "
                                                     "status word = {:#04x} "
                                                     "MFR fault =  {:#02x}",
                                                     statusWord, statusMFR)
                                             .c_str());
                     }
                     faultFound = true;
                     mfrFault = true;
                 }

                 if (statusWord & status_word::VIN_UV_FAULT)
                 {
                     if (!vinUVFault)
                     {
                         log<level::INFO>(fmt::format("VIN_UV fault: "
                                                      "status word = {:#04x}, "
                                                      "MFR fault = {:#02x}",
                                                      statusWord, statusMFR)
                                              .c_str());
                     }

                     faultFound = true;
                     vinUVFault = true;
                 }
             }
             else
             {
                 faultFound = false;
                 inputFault = false;
                 mfrFault = false;
                 vinUVFault = false;
             }
         }
         catch (const ReadFailure& e)
         {
             readFail++;
             phosphor::logging::commit<ReadFailure>();
         }
     }
 }

 void PowerSupply::onOffConfig(uint8_t data)
 {
     using namespace phosphor::pmbus;

     if (present)
     {
         log<level::INFO>("ON_OFF_CONFIG write", entry("DATA=0x%02X", data));
         try
         {
             std::vector<uint8_t> configData{data};
             pmbusIntf->writeBinary(ON_OFF_CONFIG, configData,
                                    Type::HwmonDeviceDebug);
         }
         catch (...)
         {
             // The underlying code in writeBinary will log a message to the
             // journal if the write fails. If the ON_OFF_CONFIG is not setup
             // as desired, later fault detection and analysis code should
             // catch any of the fall out. We should not need to terminate
             // the application if this write fails.
         }
     }
 }

 void PowerSupply::clearFaults()
 {
     faultLogged = false;
     // The PMBus device driver does not allow for writing CLEAR_FAULTS
     // directly. However, the pmbus hwmon device driver code will send a
     // CLEAR_FAULTS after reading from any of the hwmon "files" in sysfs, so
     // reading in1_input should result in clearing the fault bits in
     // STATUS_BYTE/STATUS_WORD.
     // I do not care what the return value is.
     if (present)
     {
         faultFound = false;
         inputFault = false;
         mfrFault = false;
         statusMFR = 0;
         vinUVFault = false;
         readFail = 0;

         try
         {
             static_cast<void>(
                 pmbusIntf->read("in1_input", phosphor::pmbus::Type::Hwmon));
         }
         catch (const ReadFailure& e)
         {
             // Since I do not care what the return value is, I really do not
             // care much if it gets a ReadFailure either. However, this
             // should not prevent the application from continuing to run, so
             // catching the read failure.
         }
     }
 }

 void PowerSupply::inventoryChanged(sdbusplus::message::message& msg)
 {
     std::string msgSensor;
     std::map<std::string, std::variant<uint32_t, bool>> msgData;
     msg.read(msgSensor, msgData);

     // Check if it was the Present property that changed.
     auto valPropMap = msgData.find(PRESENT_PROP);
     if (valPropMap != msgData.end())
     {
         if (std::get<bool>(valPropMap->second))
         {
             present = true;
             // TODO: Immediately trying to read or write the "files" causes
             // read or write failures.
             using namespace std::chrono_literals;
             std::this_thread::sleep_for(20ms);
             pmbusIntf->findHwmonDir();
             onOffConfig(phosphor::pmbus::ON_OFF_CONFIG_CONTROL_PIN_ONLY);
             clearFaults();
             updateInventory();
         }
         else
         {
             present = false;

             // Clear out the now outdated inventory properties
             updateInventory();
         }
     }
 }

 void PowerSupply::inventoryAdded(sdbusplus::message::message& msg)
 {
     sdbusplus::message::object_path path;
     msg.read(path);
     // Make sure the signal is for the PSU inventory path
     if (path == inventoryPath)
     {
         std::map<std::string, std::map<std::string, std::variant<bool>>>
             interfaces;
         // Get map of interfaces and their properties
         msg.read(interfaces);

         auto properties = interfaces.find(INVENTORY_IFACE);
         if (properties != interfaces.end())
         {
             auto property = properties->second.find(PRESENT_PROP);
             if (property != properties->second.end())
             {
                 present = std::get<bool>(property->second);

                 log<level::INFO>(fmt::format("Power Supply {} Present {}",
                                              inventoryPath, present)
                                      .c_str());

                 updateInventory();
             }
         }
     }
 }

 void PowerSupply::updateInventory()
 {
     using namespace phosphor::pmbus;

 #if IBM_VPD
     std::string ccin;
     std::string pn;
     std::string fn;
     std::string header;
     std::string sn;
     using PropertyMap =
         std::map<std::string,
                  std::variant<std::string, std::vector<uint8_t>, bool>>;
     PropertyMap assetProps;
     PropertyMap operProps;
     PropertyMap versionProps;
     PropertyMap ipzvpdDINFProps;
     PropertyMap ipzvpdVINIProps;
     using InterfaceMap = std::map<std::string, PropertyMap>;
     InterfaceMap interfaces;
     using ObjectMap = std::map<sdbusplus::message::object_path, InterfaceMap>;
     ObjectMap object;
 #endif
     log<level::DEBUG>(
         fmt::format("updateInventory() inventoryPath: {}", inventoryPath)
             .c_str());

     if (present)
     {
         // TODO: non-IBM inventory updates?

 #if IBM_VPD
         try
         {
             ccin = pmbusIntf->readString(CCIN, Type::HwmonDeviceDebug);
             assetProps.emplace(MODEL_PROP, ccin);
             modelName = ccin;
         }
         catch (const ReadFailure& e)
         {
             // Ignore the read failure, let pmbus code indicate failure,
             // path...
             // TODO - ibm918
             // https://github.com/openbmc/docs/blob/master/designs/vpd-collection.md
             // The BMC must log errors if any of the VPD cannot be properly
             // parsed or fails ECC checks.
         }

         try
         {
             pn = pmbusIntf->readString(PART_NUMBER, Type::HwmonDeviceDebug);
             assetProps.emplace(PN_PROP, pn);
         }
         catch (const ReadFailure& e)
         {
             // Ignore the read failure, let pmbus code indicate failure,
             // path...
         }

         try
         {
             fn = pmbusIntf->readString(FRU_NUMBER, Type::HwmonDeviceDebug);
         }
         catch (const ReadFailure& e)
         {
             // Ignore the read failure, let pmbus code indicate failure,
             // path...
         }

         try
         {
             header =
                 pmbusIntf->readString(SERIAL_HEADER, Type::HwmonDeviceDebug);
             sn = pmbusIntf->readString(SERIAL_NUMBER, Type::HwmonDeviceDebug);
             assetProps.emplace(SN_PROP, sn);
         }
         catch (const ReadFailure& e)
         {
             // Ignore the read failure, let pmbus code indicate failure,
             // path...
         }

         try
         {
             fwVersion =
                 pmbusIntf->readString(FW_VERSION, Type::HwmonDeviceDebug);
             versionProps.emplace(VERSION_PROP, fwVersion);
         }
         catch (const ReadFailure& e)
         {
             // Ignore the read failure, let pmbus code indicate failure,
             // path...
         }

         ipzvpdVINIProps.emplace("CC",
                                 std::vector<uint8_t>(ccin.begin(), ccin.end()));
         ipzvpdVINIProps.emplace("PN",
                                 std::vector<uint8_t>(pn.begin(), pn.end()));
         ipzvpdVINIProps.emplace("FN",
                                 std::vector<uint8_t>(fn.begin(), fn.end()));
         std::string header_sn = header + sn + '\0';
         ipzvpdVINIProps.emplace(
             "SN", std::vector<uint8_t>(header_sn.begin(), header_sn.end()));
         std::string description = "IBM PS";
         ipzvpdVINIProps.emplace(
             "DR", std::vector<uint8_t>(description.begin(), description.end()));

         // Update the Resource Identifier (RI) keyword
         // 2 byte FRC: 0x0003
         // 2 byte RID: 0x1000, 0x1001...
         std::uint8_t num = std::stoul(
             inventoryPath.substr(inventoryPath.size() - 1, 1), nullptr, 0);
         std::vector<uint8_t> ri{0x00, 0x03, 0x10, num};
         ipzvpdDINFProps.emplace("RI", ri);

         // Fill in the FRU Label (FL) keyword.
         std::string fl = "E";
         fl.push_back(inventoryPath.back());
         fl.resize(FL_KW_SIZE, ' ');
         ipzvpdDINFProps.emplace("FL",
                                 std::vector<uint8_t>(fl.begin(), fl.end()));

         interfaces.emplace(ASSET_IFACE, std::move(assetProps));
         interfaces.emplace(VERSION_IFACE, std::move(versionProps));
         interfaces.emplace(DINF_IFACE, std::move(ipzvpdDINFProps));
         interfaces.emplace(VINI_IFACE, std::move(ipzvpdVINIProps));

         // Update the Functional
         operProps.emplace(FUNCTIONAL_PROP, present);
         interfaces.emplace(OPERATIONAL_STATE_IFACE, std::move(operProps));

         auto path = inventoryPath.substr(strlen(INVENTORY_OBJ_PATH));
         object.emplace(path, std::move(interfaces));

         try
         {
             auto service =
                 util::getService(INVENTORY_OBJ_PATH, INVENTORY_MGR_IFACE, bus);

             if (service.empty())
             {
                 log<level::ERR>("Unable to get inventory manager service");
                 return;
             }

             auto method =
                 bus.new_method_call(service.c_str(), INVENTORY_OBJ_PATH,
                                     INVENTORY_MGR_IFACE, "Notify");

             method.append(std::move(object));

             auto reply = bus.call(method);
         }
         catch (const std::exception& e)
         {
             log<level::ERR>(
                 std::string(e.what() + std::string(" PATH=") + inventoryPath)
                     .c_str());
         }
 #endif
     }
 }

 void PowerSupply::getInputVoltage(double& actualInputVoltage,
                                   int& inputVoltage) const
 {
     using namespace phosphor::pmbus;

     actualInputVoltage = in_input::VIN_VOLTAGE_0;
     inputVoltage = in_input::VIN_VOLTAGE_0;

     if (present)
     {
         try
         {
             // Read input voltage in millivolts
             auto inputVoltageStr = pmbusIntf->readString(READ_VIN, Type::Hwmon);

             // Convert to volts
             actualInputVoltage = std::stod(inputVoltageStr) / 1000;

             // Calculate the voltage based on voltage thresholds
             if (actualInputVoltage < in_input::VIN_VOLTAGE_MIN)
             {
                 inputVoltage = in_input::VIN_VOLTAGE_0;
             }
             else if (actualInputVoltage < in_input::VIN_VOLTAGE_110_THRESHOLD)
             {
                 inputVoltage = in_input::VIN_VOLTAGE_110;
             }
             else
             {
                 inputVoltage = in_input::VIN_VOLTAGE_220;
             }
         }
         catch (const std::exception& e)
         {
             log<level::ERR>(
                 fmt::format("READ_VIN read error: {}", e.what()).c_str());
         }
     }
 }

 } // namespace phosphor::power::psu
	#include "config.h"

	#include "power_supply.hpp"

	#include "types.hpp"
	#include "util.hpp"

	#include <fmt/format.h>

	#include <xyz/openbmc_project/Common/Device/error.hpp>

	#include <chrono> // sleep_for()
	#include <cstdint> // uint8_t...
	#include <fstream>
	#include <thread> // sleep_for()

	namespace phosphor::power::psu
	{
	// Amount of time in milliseconds to delay between power supply going from
	// missing to present before running the bind command(s).
	constexpr auto bindDelay = 1000;

	using namespace phosphor::logging;
	using namespace sdbusplus::xyz::openbmc_project::Common::Device::Error;

	PowerSupply::PowerSupply(sdbusplus::bus::bus& bus, const std::string& invpath,
	std::uint8_t i2cbus, std::uint16_t i2caddr,
	const std::string& gpioLineName) :
	bus(bus),
	inventoryPath(invpath), bindPath("/sys/bus/i2c/drivers/ibm-cffps")
	{
	if (inventoryPath.empty())
	{
	throw std::invalid_argument{"Invalid empty inventoryPath"};
	}

	if (gpioLineName.empty())
	{
	throw std::invalid_argument{"Invalid empty gpioLineName"};
	}

	log<level::DEBUG>(fmt::format("gpioLineName: {}", gpioLineName).c_str());
	presenceGPIO = createGPIO(gpioLineName);

	std::ostringstream ss;
	ss << std::hex << std::setw(4) << std::setfill('0') << i2caddr;
	std::string addrStr = ss.str();
	std::string busStr = std::to_string(i2cbus);
	bindDevice = busStr;
	bindDevice.append("-");
	bindDevice.append(addrStr);

	pmbusIntf = phosphor::pmbus::createPMBus(i2cbus, addrStr);

	// Get the current state of the Present property.
	try
	{
	updatePresenceGPIO();
	}
	catch (...)
	{
	// If the above attempt to use the GPIO failed, it likely means that the
	// GPIOs are in use by the kernel, meaning it is using gpio-keys.
	// So, I should rely on phosphor-gpio-presence to update D-Bus, and
	// work that way for power supply presence.
	presenceGPIO = nullptr;
	// Setup the functions to call when the D-Bus inventory path for the
	// Present property changes.
	presentMatch = std::make_unique<sdbusplus::bus::match_t>(
	bus,
	sdbusplus::bus::match::rules::propertiesChanged(inventoryPath,
	INVENTORY_IFACE),
	[this](auto& msg) { this->inventoryChanged(msg); });

	presentAddedMatch = std::make_unique<sdbusplus::bus::match_t>(
	bus,
	sdbusplus::bus::match::rules::interfacesAdded() +
	sdbusplus::bus::match::rules::argNpath(0, inventoryPath),
	[this](auto& msg) { this->inventoryAdded(msg); });

	updatePresence();
	updateInventory();
	}
	}

	void PowerSupply::bindOrUnbindDriver(bool present)
	{
	auto action = (present) ? "bind" : "unbind";
	auto path = bindPath / action;

	if (present)
	{
	log<level::INFO>(
	fmt::format("Binding device driver. path: {} device: {}",
	path.string(), bindDevice)
	.c_str());
	}
	else
	{
	log<level::INFO>(
	fmt::format("Unbinding device driver. path: {} device: {}",
	path.string(), bindDevice)
	.c_str());
	}

	std::ofstream file;

	file.exceptions(std::ofstream::failbit \| std::ofstream::badbit \|
	std::ofstream::eofbit);

	try
	{
	file.open(path);
	file << bindDevice;
	file.close();
	}
	catch (const std::exception& e)
	{
	auto err = errno;

	log<level::ERR>(
	fmt::format("Failed binding or unbinding device. errno={}", err)
	.c_str());
	}
	}

	void PowerSupply::updatePresence()
	{
	try
	{
	present = getPresence(bus, inventoryPath);
	}
	catch (const sdbusplus::exception::exception& e)
	{
	// Relying on property change or interface added to retry.
	// Log an informational trace to the journal.
	log<level::INFO>(
	fmt::format("D-Bus property {} access failure exception",
	inventoryPath)
	.c_str());
	}
	}

	void PowerSupply::updatePresenceGPIO()
	{
	bool presentOld = present;

	try
	{
	if (presenceGPIO->read() > 0)
	{
	present = true;
	}
	else
	{
	present = false;
	}
	}
	catch (const std::exception& e)
	{
	log<level::ERR>(
	fmt::format("presenceGPIO read fail: {}", e.what()).c_str());
	throw;
	}

	if (presentOld != present)
	{
	log<level::DEBUG>(
	fmt::format("presentOld: {} present: {}", presentOld, present)
	.c_str());
	if (present)
	{
	std::this_thread::sleep_for(std::chrono::milliseconds(bindDelay));
	bindOrUnbindDriver(present);
	pmbusIntf->findHwmonDir();
	onOffConfig(phosphor::pmbus::ON_OFF_CONFIG_CONTROL_PIN_ONLY);
	clearFaults();
	}
	else
	{
	bindOrUnbindDriver(present);
	}

	auto invpath = inventoryPath.substr(strlen(INVENTORY_OBJ_PATH));
	auto const lastSlashPos = invpath.find_last_of('/');
	std::string prettyName = invpath.substr(lastSlashPos + 1);
	setPresence(bus, invpath, present, prettyName);
	updateInventory();
	}
	}

	void PowerSupply::analyze()
	{
	using namespace phosphor::pmbus;

	if (presenceGPIO)
	{
	updatePresenceGPIO();
	}

	if ((present) && (readFail < LOG_LIMIT))
	{
	try
	{
	statusWord = pmbusIntf->read(STATUS_WORD, Type::Debug);
	// Read worked, reset the fail count.
	readFail = 0;

	if (statusWord)
	{
	statusMFR = pmbusIntf->read(STATUS_MFR, Type::Debug);
	if (statusWord & status_word::INPUT_FAULT_WARN)
	{
	if (!inputFault)
	{
	log<level::INFO>(fmt::format("INPUT fault: "
	"status word = {:#04x}, "
	"MFR fault = {:#02x}",
	statusWord, statusMFR)
	.c_str());
	}

	faultFound = true;
	inputFault = true;
	}

	if (statusWord & status_word::MFR_SPECIFIC_FAULT)
	{
	if (!mfrFault)
	{
	log<level::ERR>(fmt::format("MFR fault: "
	"status word = {:#04x} "
	"MFR fault = {:#02x}",
	statusWord, statusMFR)
	.c_str());
	}
	faultFound = true;
	mfrFault = true;
	}

	if (statusWord & status_word::VIN_UV_FAULT)
	{
	if (!vinUVFault)
	{
	log<level::INFO>(fmt::format("VIN_UV fault: "
	"status word = {:#04x}, "
	"MFR fault = {:#02x}",
	statusWord, statusMFR)
	.c_str());
	}

	faultFound = true;
	vinUVFault = true;
	}
	}
	else
	{
	faultFound = false;
	inputFault = false;
	mfrFault = false;
	vinUVFault = false;
	}
	}
	catch (const ReadFailure& e)
	{
	readFail++;
	phosphor::logging::commit<ReadFailure>();
	}
	}
	}

	void PowerSupply::onOffConfig(uint8_t data)
	{
	using namespace phosphor::pmbus;

	if (present)
	{
	log<level::INFO>("ON_OFF_CONFIG write", entry("DATA=0x%02X", data));
	try
	{
	std::vector<uint8_t> configData{data};
	pmbusIntf->writeBinary(ON_OFF_CONFIG, configData,
	Type::HwmonDeviceDebug);
	}
	catch (...)
	{
	// The underlying code in writeBinary will log a message to the
	// journal if the write fails. If the ON_OFF_CONFIG is not setup
	// as desired, later fault detection and analysis code should
	// catch any of the fall out. We should not need to terminate
	// the application if this write fails.
	}
	}
	}

	void PowerSupply::clearFaults()
	{
	faultLogged = false;
	// The PMBus device driver does not allow for writing CLEAR_FAULTS
	// directly. However, the pmbus hwmon device driver code will send a
	// CLEAR_FAULTS after reading from any of the hwmon "files" in sysfs, so
	// reading in1_input should result in clearing the fault bits in
	// STATUS_BYTE/STATUS_WORD.
	// I do not care what the return value is.
	if (present)
	{
	faultFound = false;
	inputFault = false;
	mfrFault = false;
	statusMFR = 0;
	vinUVFault = false;
	readFail = 0;

	try
	{
	static_cast<void>(
	pmbusIntf->read("in1_input", phosphor::pmbus::Type::Hwmon));
	}
	catch (const ReadFailure& e)
	{
	// Since I do not care what the return value is, I really do not
	// care much if it gets a ReadFailure either. However, this
	// should not prevent the application from continuing to run, so
	// catching the read failure.
	}
	}
	}

	void PowerSupply::inventoryChanged(sdbusplus::message::message& msg)
	{
	std::string msgSensor;
	std::map<std::string, std::variant<uint32_t, bool>> msgData;
	msg.read(msgSensor, msgData);

	// Check if it was the Present property that changed.
	auto valPropMap = msgData.find(PRESENT_PROP);
	if (valPropMap != msgData.end())
	{
	if (std::get<bool>(valPropMap->second))
	{
	present = true;
	// TODO: Immediately trying to read or write the "files" causes
	// read or write failures.
	using namespace std::chrono_literals;
	std::this_thread::sleep_for(20ms);
	pmbusIntf->findHwmonDir();
	onOffConfig(phosphor::pmbus::ON_OFF_CONFIG_CONTROL_PIN_ONLY);
	clearFaults();
	updateInventory();
	}
	else
	{
	present = false;

	// Clear out the now outdated inventory properties
	updateInventory();
	}
	}
	}

	void PowerSupply::inventoryAdded(sdbusplus::message::message& msg)
	{
	sdbusplus::message::object_path path;
	msg.read(path);
	// Make sure the signal is for the PSU inventory path
	if (path == inventoryPath)
	{
	std::map<std::string, std::map<std::string, std::variant<bool>>>
	interfaces;
	// Get map of interfaces and their properties
	msg.read(interfaces);

	auto properties = interfaces.find(INVENTORY_IFACE);
	if (properties != interfaces.end())
	{
	auto property = properties->second.find(PRESENT_PROP);
	if (property != properties->second.end())
	{
	present = std::get<bool>(property->second);

	log<level::INFO>(fmt::format("Power Supply {} Present {}",
	inventoryPath, present)
	.c_str());

	updateInventory();
	}
	}
	}
	}

	void PowerSupply::updateInventory()
	{
	using namespace phosphor::pmbus;

	#if IBM_VPD
	std::string ccin;
	std::string pn;
	std::string fn;
	std::string header;
	std::string sn;
	using PropertyMap =
	std::map<std::string,
	std::variant<std::string, std::vector<uint8_t>, bool>>;
	PropertyMap assetProps;
	PropertyMap operProps;
	PropertyMap versionProps;
	PropertyMap ipzvpdDINFProps;
	PropertyMap ipzvpdVINIProps;
	using InterfaceMap = std::map<std::string, PropertyMap>;
	InterfaceMap interfaces;
	using ObjectMap = std::map<sdbusplus::message::object_path, InterfaceMap>;
	ObjectMap object;
	#endif
	log<level::DEBUG>(
	fmt::format("updateInventory() inventoryPath: {}", inventoryPath)
	.c_str());

	if (present)
	{
	// TODO: non-IBM inventory updates?

	#if IBM_VPD
	try
	{
	ccin = pmbusIntf->readString(CCIN, Type::HwmonDeviceDebug);
	assetProps.emplace(MODEL_PROP, ccin);
	modelName = ccin;
	}
	catch (const ReadFailure& e)
	{
	// Ignore the read failure, let pmbus code indicate failure,
	// path...
	// TODO - ibm918
	// https://github.com/openbmc/docs/blob/master/designs/vpd-collection.md
	// The BMC must log errors if any of the VPD cannot be properly
	// parsed or fails ECC checks.
	}

	try
	{
	pn = pmbusIntf->readString(PART_NUMBER, Type::HwmonDeviceDebug);
	assetProps.emplace(PN_PROP, pn);
	}
	catch (const ReadFailure& e)
	{
	// Ignore the read failure, let pmbus code indicate failure,
	// path...
	}

	try
	{
	fn = pmbusIntf->readString(FRU_NUMBER, Type::HwmonDeviceDebug);
	}
	catch (const ReadFailure& e)
	{
	// Ignore the read failure, let pmbus code indicate failure,
	// path...
	}

	try
	{
	header =
	pmbusIntf->readString(SERIAL_HEADER, Type::HwmonDeviceDebug);
	sn = pmbusIntf->readString(SERIAL_NUMBER, Type::HwmonDeviceDebug);
	assetProps.emplace(SN_PROP, sn);
	}
	catch (const ReadFailure& e)
	{
	// Ignore the read failure, let pmbus code indicate failure,
	// path...
	}

	try
	{
	fwVersion =
	pmbusIntf->readString(FW_VERSION, Type::HwmonDeviceDebug);
	versionProps.emplace(VERSION_PROP, fwVersion);
	}
	catch (const ReadFailure& e)
	{
	// Ignore the read failure, let pmbus code indicate failure,
	// path...
	}

	ipzvpdVINIProps.emplace("CC",
	std::vector<uint8_t>(ccin.begin(), ccin.end()));
	ipzvpdVINIProps.emplace("PN",
	std::vector<uint8_t>(pn.begin(), pn.end()));
	ipzvpdVINIProps.emplace("FN",
	std::vector<uint8_t>(fn.begin(), fn.end()));
	std::string header_sn = header + sn + '\0';
	ipzvpdVINIProps.emplace(
	"SN", std::vector<uint8_t>(header_sn.begin(), header_sn.end()));
	std::string description = "IBM PS";
	ipzvpdVINIProps.emplace(
	"DR", std::vector<uint8_t>(description.begin(), description.end()));

	// Update the Resource Identifier (RI) keyword
	// 2 byte FRC: 0x0003
	// 2 byte RID: 0x1000, 0x1001...
	std::uint8_t num = std::stoul(
	inventoryPath.substr(inventoryPath.size() - 1, 1), nullptr, 0);
	std::vector<uint8_t> ri{0x00, 0x03, 0x10, num};
	ipzvpdDINFProps.emplace("RI", ri);

	// Fill in the FRU Label (FL) keyword.
	std::string fl = "E";
	fl.push_back(inventoryPath.back());
	fl.resize(FL_KW_SIZE, ' ');
	ipzvpdDINFProps.emplace("FL",
	std::vector<uint8_t>(fl.begin(), fl.end()));

	interfaces.emplace(ASSET_IFACE, std::move(assetProps));
	interfaces.emplace(VERSION_IFACE, std::move(versionProps));
	interfaces.emplace(DINF_IFACE, std::move(ipzvpdDINFProps));
	interfaces.emplace(VINI_IFACE, std::move(ipzvpdVINIProps));

	// Update the Functional
	operProps.emplace(FUNCTIONAL_PROP, present);
	interfaces.emplace(OPERATIONAL_STATE_IFACE, std::move(operProps));

	auto path = inventoryPath.substr(strlen(INVENTORY_OBJ_PATH));
	object.emplace(path, std::move(interfaces));

	try
	{
	auto service =
	util::getService(INVENTORY_OBJ_PATH, INVENTORY_MGR_IFACE, bus);

	if (service.empty())
	{
	log<level::ERR>("Unable to get inventory manager service");
	return;
	}

	auto method =
	bus.new_method_call(service.c_str(), INVENTORY_OBJ_PATH,
	INVENTORY_MGR_IFACE, "Notify");

	method.append(std::move(object));

	auto reply = bus.call(method);
	}
	catch (const std::exception& e)
	{
	log<level::ERR>(
	std::string(e.what() + std::string(" PATH=") + inventoryPath)
	.c_str());
	}
	#endif
	}
	}

	void PowerSupply::getInputVoltage(double& actualInputVoltage,
	int& inputVoltage) const
	{
	using namespace phosphor::pmbus;

	actualInputVoltage = in_input::VIN_VOLTAGE_0;
	inputVoltage = in_input::VIN_VOLTAGE_0;

	if (present)
	{
	try
	{
	// Read input voltage in millivolts
	auto inputVoltageStr = pmbusIntf->readString(READ_VIN, Type::Hwmon);

	// Convert to volts
	actualInputVoltage = std::stod(inputVoltageStr) / 1000;

	// Calculate the voltage based on voltage thresholds
	if (actualInputVoltage < in_input::VIN_VOLTAGE_MIN)
	{
	inputVoltage = in_input::VIN_VOLTAGE_0;
	}
	else if (actualInputVoltage < in_input::VIN_VOLTAGE_110_THRESHOLD)
	{
	inputVoltage = in_input::VIN_VOLTAGE_110;
	}
	else
	{
	inputVoltage = in_input::VIN_VOLTAGE_220;
	}
	}
	catch (const std::exception& e)
	{
	log<level::ERR>(
	fmt::format("READ_VIN read error: {}", e.what()).c_str());
	}
	}
	}

	} // namespace phosphor::power::psu