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