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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
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in0_lcrit_alarm Undervoltage alarm
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