projects / mirror_ubuntu-zesty-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| f7c2fe38 FL |
1 | Kernel driver ina2xx |
| 2 | ==================== | |
| 3 | ||
| 4 | Supported chips: | |
| 5 | * Texas Instruments INA219 | |
| 6 | Prefix: 'ina219' | |
| 7 | Addresses: I2C 0x40 - 0x4f | |
| 8 | Datasheet: Publicly available at the Texas Instruments website | |
| 9 | http://www.ti.com/ | |
| 10 | ||
| dc92cd0c GR |
11 | * Texas Instruments INA220 |
| 12 | Prefix: 'ina220' | |
| 13 | Addresses: I2C 0x40 - 0x4f | |
| 14 | Datasheet: Publicly available at the Texas Instruments website | |
| 15 | http://www.ti.com/ | |
| 16 | ||
| f7c2fe38 FL |
17 | * Texas Instruments INA226 |
| 18 | Prefix: 'ina226' | |
| 19 | Addresses: I2C 0x40 - 0x4f | |
| 20 | Datasheet: Publicly available at the Texas Instruments website | |
| 21 | http://www.ti.com/ | |
| 22 | ||
| dc92cd0c GR |
23 | * Texas Instruments INA230 |
| 24 | Prefix: 'ina230' | |
| 25 | Addresses: I2C 0x40 - 0x4f | |
| 26 | Datasheet: Publicly available at the Texas Instruments website | |
| 27 | http://www.ti.com/ | |
| 28 | ||
| add513be KH |
29 | * Texas Instruments INA231 |
| 30 | Prefix: 'ina231' | |
| 31 | Addresses: I2C 0x40 - 0x4f | |
| 32 | Datasheet: Publicly available at the Texas Instruments website | |
| 33 | http://www.ti.com/ | |
| 34 | ||
| f7c2fe38 FL |
35 | Author: Lothar Felten <l-felten@ti.com> |
| 36 | ||
| 37 | Description | |
| 38 | ----------- | |
| 39 | ||
| 40 | The INA219 is a high-side current shunt and power monitor with an I2C | |
| 41 | interface. The INA219 monitors both shunt drop and supply voltage, with | |
| 42 | programmable conversion times and filtering. | |
| 43 | ||
| dc92cd0c GR |
44 | The INA220 is a high or low side current shunt and power monitor with an I2C |
| 45 | interface. The INA220 monitors both shunt drop and supply voltage. | |
| 46 | ||
| f7c2fe38 FL |
47 | The INA226 is a current shunt and power monitor with an I2C interface. |
| 48 | The INA226 monitors both a shunt voltage drop and bus supply voltage. | |
| 49 | ||
| add513be KH |
50 | INA230 and INA231 are high or low side current shunt and power monitors |
| 51 | with an I2C interface. The chips monitor both a shunt voltage drop and | |
| 52 | bus supply voltage. | |
| dc92cd0c | 53 | |
| 8a5fc795 BG |
54 | The shunt value in micro-ohms can be set via platform data or device tree at |
| 55 | compile-time or via the shunt_resistor attribute in sysfs at run-time. Please | |
| 56 | refer to the Documentation/devicetree/bindings/i2c/ina2xx.txt for bindings | |
| 31e7ad74 | 57 | if the device tree is used. |
| 72a87a47 BG |
58 | |
| 59 | Additionally ina226 supports update_interval attribute as described in | |
| 60 | Documentation/hwmon/sysfs-interface. Internally the interval is the sum of | |
| 61 | bus and shunt voltage conversion times multiplied by the averaging rate. We | |
| 62 | don't touch the conversion times and only modify the number of averages. The | |
| 63 | lower limit of the update_interval is 2 ms, the upper limit is 2253 ms. | |
| 64 | The actual programmed interval may vary from the desired value. |