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- .. SPDX-License-Identifier: GPL-2.0-only
- Kernel driver ina238
- ====================
- 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 <nathan.rossi@digi.com>
- Description
- -----------
- 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.
- 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
- 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
- ======================= =======================================================
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