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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
-------------
======================= ======================================================
in0_input Core voltage in millivolts
in1_input SDRAM controller voltage in millivolts
in2_input SDRAM I/O voltage in millivolts
in3_input SDRAM PHY voltage in millivolts
in0_label "core"
in1_label "sdram_c"
in2_label "sdram_i"
in3_label "sdram_p"
in0_lcrit_alarm Undervoltage alarm
======================= ======================================================
The voltage inputs and labels are only exposed if the firmware reports support
for the corresponding voltage ID.
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