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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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3e8e93cbb8
The hwmon sysfs interface specifies that energy values should be
reported in microjoules. This is also what tools such as lmsensors
expect, reporting wrong values otherwise.
Adjust the driver to scale the output accordingly and adjust ina238
driver documentation.
Fixes: 6daaf15a11 ("hwmon: (ina238) Add support for SQ52206")
Signed-off-by: Jonas Rebmann <jre@pengutronix.de>
Link: https://lore.kernel.org/r/20250715-hwmon-ina238-microjoules-v1-1-9df678568a41@pengutronix.de
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
72 lines
2.0 KiB
ReStructuredText
72 lines
2.0 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0-only
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Kernel driver ina238
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====================
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Supported chips:
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* Texas Instruments INA238
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Prefix: 'ina238'
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Addresses: I2C 0x40 - 0x4f
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Datasheet:
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https://www.ti.com/lit/gpn/ina238
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* Silergy SQ52206
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Prefix: 'SQ52206'
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Addresses: I2C 0x40 - 0x4f
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Author: Nathan Rossi <nathan.rossi@digi.com>
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Description
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-----------
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The INA238 is a current shunt, power and temperature monitor with an I2C
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interface. It includes a number of programmable functions including alerts,
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conversion rate, sample averaging and selectable shunt voltage accuracy.
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The shunt value in micro-ohms can be set via platform data or device tree at
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compile-time or via the shunt_resistor attribute in sysfs at run-time. Please
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refer to the Documentation/devicetree/bindings/hwmon/ti,ina2xx.yaml for bindings
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if the device tree is used.
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Sysfs entries
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-------------
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======================= =======================================================
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in0_input Shunt voltage (mV)
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in0_min Minimum shunt voltage threshold (mV)
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in0_min_alarm Minimum shunt voltage alarm
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in0_max Maximum shunt voltage threshold (mV)
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in0_max_alarm Maximum shunt voltage alarm
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in1_input Bus voltage (mV)
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in1_min Minimum bus voltage threshold (mV)
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in1_min_alarm Minimum shunt voltage alarm
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in1_max Maximum bus voltage threshold (mV)
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in1_max_alarm Maximum shunt voltage alarm
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power1_input Power measurement (uW)
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power1_max Maximum power threshold (uW)
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power1_max_alarm Maximum power alarm
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curr1_input Current measurement (mA)
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temp1_input Die temperature measurement (mC)
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temp1_max Maximum die temperature threshold (mC)
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temp1_max_alarm Maximum die temperature alarm
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======================= =======================================================
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Additional sysfs entries for sq52206
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------------------------------------
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======================= =======================================================
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energy1_input Energy measurement (uJ)
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power1_input_highest Peak Power (uW)
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======================= =======================================================
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