Kernel driver raspberrypi-hwmon =============================== Supported boards: * Raspberry Pi A+ (via GPIO on SoC) * Raspberry Pi B+ (via GPIO on SoC) * Raspberry Pi 2 B (via GPIO on SoC) * Raspberry Pi 3 B (via GPIO on port expander) * Raspberry Pi 3 B+ (via PMIC) Author: Stefan Wahren <stefan.wahren@i2se.com> Description ----------- This driver periodically polls a mailbox property of the VC4 firmware to detect undervoltage conditions. Sysfs entries ------------- ======================= ================== in0_lcrit_alarm Undervoltage alarm ======================= ==================