37 lines
1.0 KiB
ReStructuredText
37 lines
1.0 KiB
ReStructuredText
Kernel driver raspberrypi-hwmon
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===============================
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Supported boards:
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* Raspberry Pi A+ (via GPIO on SoC)
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* Raspberry Pi B+ (via GPIO on SoC)
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* Raspberry Pi 2 B (via GPIO on SoC)
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* Raspberry Pi 3 B (via GPIO on port expander)
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* Raspberry Pi 3 B+ (via PMIC)
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Author: Stefan Wahren <stefan.wahren@i2se.com>
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Description
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-----------
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This driver periodically polls a mailbox property of the VC4 firmware to detect
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undervoltage conditions.
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Sysfs entries
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-------------
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======================= ======================================================
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in0_input Core voltage in millivolts
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in1_input SDRAM controller voltage in millivolts
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in2_input SDRAM I/O voltage in millivolts
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in3_input SDRAM PHY voltage in millivolts
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in0_label "core"
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in1_label "sdram_c"
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in2_label "sdram_i"
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in3_label "sdram_p"
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in0_lcrit_alarm Undervoltage alarm
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======================= ======================================================
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The voltage inputs and labels are only exposed if the firmware reports support
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for the corresponding voltage ID.
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