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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/i2c/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.
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