Documentation/hwmon/lochnagar.rst

Source file repositories/reference/linux-study-clean/Documentation/hwmon/lochnagar.rst

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Linux kernel
Corpus path
Documentation/hwmon/lochnagar.rst
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.rst
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3920 bytes
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84
Domain
Support Tooling And Documentation
Bucket
Documentation
Inferred role
Support Tooling And Documentation: documentation
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

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Annotated Snippet

Kernel Driver Lochnagar
=======================

Supported systems:
  * Cirrus Logic : Lochnagar 2

Author: Lucas A. Tanure Alves

Description
-----------

Lochnagar 2 features built-in Current Monitor circuitry that allows for the
measurement of both voltage and current on up to eight of the supply voltage
rails provided to the minicards. The Current Monitor does not require any
hardware modifications or external circuitry to operate.

The current and voltage measurements are obtained through the standard register
map interface to the Lochnagar board controller, and can therefore be monitored
by software.

Sysfs attributes
----------------

======================= =======================================================
temp1_input             The Lochnagar board temperature (milliCelsius)
in0_input               Measured voltage for DBVDD1 (milliVolts)
in0_label               "DBVDD1"
curr1_input             Measured current for DBVDD1 (milliAmps)
curr1_label             "DBVDD1"
power1_average          Measured average power for DBVDD1 (microWatts)
power1_average_interval Power averaging time input valid from 1 to 1708mS
power1_label            "DBVDD1"
in1_input               Measured voltage for 1V8 DSP (milliVolts)
in1_label               "1V8 DSP"
curr2_input             Measured current for 1V8 DSP (milliAmps)
curr2_label             "1V8 DSP"
power2_average          Measured average power for 1V8 DSP (microWatts)
power2_average_interval Power averaging time input valid from 1 to 1708mS
power2_label            "1V8 DSP"
in2_input               Measured voltage for 1V8 CDC (milliVolts)
in2_label               "1V8 CDC"
curr3_input             Measured current for 1V8 CDC (milliAmps)
curr3_label             "1V8 CDC"
power3_average          Measured average power for 1V8 CDC (microWatts)
power3_average_interval Power averaging time input valid from 1 to 1708mS
power3_label            "1V8 CDC"
in3_input               Measured voltage for VDDCORE DSP (milliVolts)
in3_label               "VDDCORE DSP"
curr4_input             Measured current for VDDCORE DSP (milliAmps)
curr4_label             "VDDCORE DSP"
power4_average          Measured average power for VDDCORE DSP (microWatts)
power4_average_interval Power averaging time input valid from 1 to 1708mS
power4_label            "VDDCORE DSP"
in4_input               Measured voltage for AVDD 1V8 (milliVolts)
in4_label               "AVDD 1V8"
curr5_input             Measured current for AVDD 1V8 (milliAmps)
curr5_label             "AVDD 1V8"
power5_average          Measured average power for AVDD 1V8 (microWatts)
power5_average_interval Power averaging time input valid from 1 to 1708mS
power5_label            "AVDD 1V8"
curr6_input             Measured current for SYSVDD (milliAmps)
curr6_label             "SYSVDD"
power6_average          Measured average power for SYSVDD (microWatts)
power6_average_interval Power averaging time input valid from 1 to 1708mS
power6_label            "SYSVDD"
in6_input               Measured voltage for VDDCORE CDC (milliVolts)
in6_label               "VDDCORE CDC"
curr7_input             Measured current for VDDCORE CDC (milliAmps)
curr7_label             "VDDCORE CDC"
power7_average          Measured average power for VDDCORE CDC (microWatts)

Annotation

Implementation Notes