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The INA238 is a I2C power monitor similar to other INA2xx devices, providing shunt voltage, bus voltage, current, power and temperature measurements. Signed-off-by: Nathan Rossi <nathan.rossi@digi.com> Link: https://lore.kernel.org/r/20211102052754.817220-3-nathan@nathanrossi.com Signed-off-by: Guenter Roeck <linux@roeck-us.net>
56 lines
1.7 KiB
ReStructuredText
56 lines
1.7 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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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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