healthd中充电类型的识别
LA.UM.9.15.2.C3/system/core/healthd/BatteryMonitor.cpp
healthd中chg是AC还是usb充电读取的是/sys/class/power_supply/usb/type
BatteryMonitor::PowerSupplyType BatteryMonitor::readPowerSupplyType(const String8& path) {
static SysfsStringEnumMap<int> supplyTypeMap[] = {
{"Unknown", ANDROID_POWER_SUPPLY_TYPE_UNKNOWN},
{"Battery", ANDROID_POWER_SUPPLY_TYPE_BATTERY},
{"UPS", ANDROID_POWER_SUPPLY_TYPE_AC},
{"Mains", ANDROID_POWER_SUPPLY_TYPE_AC},
{"USB", ANDROID_POWER_SUPPLY_TYPE_USB},
{"USB_DCP", ANDROID_POWER_SUPPLY_TYPE_AC},
{"USB_HVDCP", ANDROID_POWER_SUPPLY_TYPE_AC},
{"USB_CDP", ANDROID_POWER_SUPPLY_TYPE_AC},
{"USB_ACA", ANDROID_POWER_SUPPLY_TYPE_AC},
{"USB_C", ANDROID_POWER_SUPPLY_TYPE_AC},
{"USB_PD", ANDROID_POWER_SUPPLY_TYPE_AC},
{"USB_PD_DRP", ANDROID_POWER_SUPPLY_TYPE_USB},
{"Wireless", ANDROID_POWER_SUPPLY_TYPE_WIRELESS},
{NULL, 0},
};