Documentation/hwmon/ina238.rst
.. SPDX-License-Identifier: GPL-2.0-only
Supported chips:
Texas Instruments INA228
Prefix: 'ina228'
Addresses: I2C 0x40 - 0x4f
Datasheet: https://www.ti.com/lit/gpn/ina228
Texas Instruments INA237
Prefix: 'ina237'
Addresses: I2C 0x40 - 0x4f
Datasheet: https://www.ti.com/lit/gpn/ina237
Texas Instruments INA238
Prefix: 'ina238'
Addresses: I2C 0x40 - 0x4f
Datasheet: https://www.ti.com/lit/gpn/ina238
Texas Instruments INA700
Datasheet: https://www.ti.com/product/ina700
Texas Instruments INA780
Datasheet: https://www.ti.com/product/ina780a
Silergy SQ52206
Prefix: 'SQ52206'
Addresses: I2C 0x40 - 0x4f
Author: Nathan Rossi [email protected]
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 device properties, either from platform code or from device tree data. Please refer to Documentation/devicetree/bindings/hwmon/ti,ina2xx.yaml for bindings if device tree is used.
INA237 is a functionally equivalent variant of INA238 with slightly different accuracy. INA228 is another variant of INA238 with higher ADC resolution. This chip also reports the energy.
INA700 and INA780 are variants of the chip series with built-in shunt resistor. They also report the energy.
SQ52206 is a mostly compatible chip from Sylergy. It reports the energy as well as the peak power consumption.
======================= ======================================================= 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 power1_input_highest Peak Power (uW) (SQ52206 only)
curr1_input Current measurement (mA) curr1_min Minimum current threshold (mA) curr1_min_alarm Minimum current alarm curr1_max Maximum current threshold (mA) curr1_max_alarm Maximum current alarm
energy1_input Energy measurement (uJ) (SQ52206, INA237, and INA780 only)
temp1_input Die temperature measurement (mC) temp1_max Maximum die temperature threshold (mC) temp1_max_alarm Maximum die temperature alarm ======================= =======================================================