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-Kernel driver ina2xx
-====================
-
-Supported chips:
- * Texas Instruments INA219
- Prefix: 'ina219'
- Addresses: I2C 0x40 - 0x4f
- Datasheet: Publicly available at the Texas Instruments website
- http://www.ti.com/
-
- * Texas Instruments INA220
- Prefix: 'ina220'
- Addresses: I2C 0x40 - 0x4f
- Datasheet: Publicly available at the Texas Instruments website
- http://www.ti.com/
-
- * Texas Instruments INA226
- Prefix: 'ina226'
- Addresses: I2C 0x40 - 0x4f
- Datasheet: Publicly available at the Texas Instruments website
- http://www.ti.com/
-
- * Texas Instruments INA230
- Prefix: 'ina230'
- Addresses: I2C 0x40 - 0x4f
- Datasheet: Publicly available at the Texas Instruments website
- http://www.ti.com/
-
- * Texas Instruments INA231
- Prefix: 'ina231'
- Addresses: I2C 0x40 - 0x4f
- Datasheet: Publicly available at the Texas Instruments website
- http://www.ti.com/
-
-Author: Lothar Felten <lothar.felten@gmail.com>
-
-Description
------------
-
-The INA219 is a high-side current shunt and power monitor with an I2C
-interface. The INA219 monitors both shunt drop and supply voltage, with
-programmable conversion times and filtering.
-
-The INA220 is a high or low side current shunt and power monitor with an I2C
-interface. The INA220 monitors both shunt drop and supply voltage.
-
-The INA226 is a current shunt and power monitor with an I2C interface.
-The INA226 monitors both a shunt voltage drop and bus supply voltage.
-
-INA230 and INA231 are high or low side current shunt and power monitors
-with an I2C interface. The chips monitor both a shunt voltage drop and
-bus supply voltage.
-
-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/ina2xx.txt for bindings
-if the device tree is used.
-
-Additionally ina226 supports update_interval attribute as described in
-Documentation/hwmon/sysfs-interface. Internally the interval is the sum of
-bus and shunt voltage conversion times multiplied by the averaging rate. We
-don't touch the conversion times and only modify the number of averages. The
-lower limit of the update_interval is 2 ms, the upper limit is 2253 ms.
-The actual programmed interval may vary from the desired value.
-
-General sysfs entries
--------------
-
-in0_input Shunt voltage(mV) channel
-in1_input Bus voltage(mV) channel
-curr1_input Current(mA) measurement channel
-power1_input Power(uW) measurement channel
-shunt_resistor Shunt resistance(uOhm) channel
-
-Sysfs entries for ina226, ina230 and ina231 only
--------------
-
-update_interval data conversion time; affects number of samples used
- to average results for shunt and bus voltages.