| rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame^] | 1 | Kernel driver tmp401 |
| 2 | ==================== |
| 3 | |
| 4 | Supported chips: |
| 5 | * Texas Instruments TMP401 |
| 6 | Prefix: 'tmp401' |
| 7 | Addresses scanned: I2C 0x4c |
| 8 | Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp401.html |
| 9 | * Texas Instruments TMP411 |
| 10 | Prefix: 'tmp411' |
| 11 | Addresses scanned: I2C 0x4c, 0x4d, 0x4e |
| 12 | Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp411.html |
| 13 | * Texas Instruments TMP431 |
| 14 | Prefix: 'tmp431' |
| 15 | Addresses scanned: I2C 0x4c, 0x4d |
| 16 | Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp431.html |
| 17 | * Texas Instruments TMP432 |
| 18 | Prefix: 'tmp432' |
| 19 | Addresses scanned: I2C 0x4c, 0x4d |
| 20 | Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp432.html |
| 21 | * Texas Instruments TMP435 |
| 22 | Prefix: 'tmp435' |
| 23 | Addresses scanned: I2C 0x48 - 0x4f |
| 24 | Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp435.html |
| 25 | * Texas Instruments TMP461 |
| 26 | Prefix: 'tmp461' |
| 27 | Datasheet: http://www.ti.com/product/tmp461 |
| 28 | |
| 29 | Authors: |
| 30 | Hans de Goede <hdegoede@redhat.com> |
| 31 | Andre Prendel <andre.prendel@gmx.de> |
| 32 | |
| 33 | Description |
| 34 | ----------- |
| 35 | |
| 36 | This driver implements support for Texas Instruments TMP401, TMP411, |
| 37 | TMP431, TMP432, TMP435, and TMP461 chips. These chips implement one or two |
| 38 | remote and one local temperature sensors. Temperature is measured in degrees |
| 39 | Celsius. Resolution of the remote sensor is 0.0625 degree. Local |
| 40 | sensor resolution can be set to 0.5, 0.25, 0.125 or 0.0625 degree (not |
| 41 | supported by the driver so far, so using the default resolution of 0.5 |
| 42 | degree). |
| 43 | |
| 44 | The driver provides the common sysfs-interface for temperatures (see |
| 45 | Documentation/hwmon/sysfs-interface under Temperatures). |
| 46 | |
| 47 | The TMP411 and TMP431 chips are compatible with TMP401. TMP411 provides |
| 48 | some additional features. |
| 49 | |
| 50 | * Minimum and Maximum temperature measured since power-on, chip-reset |
| 51 | |
| 52 | Exported via sysfs attributes tempX_lowest and tempX_highest. |
| 53 | |
| 54 | * Reset of historical minimum/maximum temperature measurements |
| 55 | |
| 56 | Exported via sysfs attribute temp_reset_history. Writing 1 to this |
| 57 | file triggers a reset. |
| 58 | |
| 59 | TMP432 is compatible with TMP401 and TMP431. It supports two external |
| 60 | temperature sensors. |
| 61 | |
| 62 | TMP461 is compatible with TMP401. It supports offset correction |
| 63 | that is applied to the remote sensor. |
| 64 | |
| 65 | * Sensor offset values are temperature values |
| 66 | |
| 67 | Exported via sysfs attribute tempX_offset |