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.. SPDX-License-Identifier: GPL-2.0-only
Kernel driver ina238
Supported chips:
* Texas Instruments INA238
Prefix: 'ina238'
Addresses: I2C 0x40 - 0x4f
Author: Nathan Rossi <>
The INA238 is a current shunt, power and temperature monitor with an I2C
interface. It includes a number of programmable functions including alerts,
conversion rate, sample averaging and selectable shunt voltage accuracy.
The shunt value in micro-ohms can be set via platform data or device tree at
compile-time or via the shunt_resistor attribute in sysfs at run-time. Please
refer to the Documentation/devicetree/bindings/hwmon/ti,ina2xx.yaml for bindings
if the device tree is used.
Sysfs entries
======================= =======================================================
in0_input Shunt voltage (mV)
in0_min Minimum shunt voltage threshold (mV)
in0_min_alarm Minimum shunt voltage alarm
in0_max Maximum shunt voltage threshold (mV)
in0_max_alarm Maximum shunt voltage alarm
in1_input Bus voltage (mV)
in1_min Minimum bus voltage threshold (mV)
in1_min_alarm Minimum shunt voltage alarm
in1_max Maximum bus voltage threshold (mV)
in1_max_alarm Maximum shunt voltage alarm
power1_input Power measurement (uW)
power1_max Maximum power threshold (uW)
power1_max_alarm Maximum power alarm
curr1_input Current measurement (mA)
temp1_input Die temperature measurement (mC)
temp1_max Maximum die temperature threshold (mC)
temp1_max_alarm Maximum die temperature alarm
======================= =======================================================