| 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 <l-felten@ti.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. |