| Andre Prendel | cd4e96c | 2009-06-15 18:39:49 +0200 | [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' |
| Guenter Roeck | a1fac92 | 2013-03-15 12:55:08 -0700 | [diff] [blame^] | 11 | Addresses scanned: I2C 0x4c, 0x4d, 0x4e |
| Andre Prendel | cd4e96c | 2009-06-15 18:39:49 +0200 | [diff] [blame] | 12 | Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp411.html |
| Guenter Roeck | a1fac92 | 2013-03-15 12:55:08 -0700 | [diff] [blame^] | 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 |
| Andre Prendel | cd4e96c | 2009-06-15 18:39:49 +0200 | [diff] [blame] | 17 | |
| 18 | Authors: |
| 19 | Hans de Goede <hdegoede@redhat.com> |
| 20 | Andre Prendel <andre.prendel@gmx.de> |
| 21 | |
| 22 | Description |
| 23 | ----------- |
| 24 | |
| Guenter Roeck | a1fac92 | 2013-03-15 12:55:08 -0700 | [diff] [blame^] | 25 | This driver implements support for Texas Instruments TMP401, TMP411, |
| 26 | and TMP431 chips. These chips implement one remote and one local |
| Andre Prendel | cd4e96c | 2009-06-15 18:39:49 +0200 | [diff] [blame] | 27 | temperature sensor. Temperature is measured in degrees |
| 28 | Celsius. Resolution of the remote sensor is 0.0625 degree. Local |
| 29 | sensor resolution can be set to 0.5, 0.25, 0.125 or 0.0625 degree (not |
| 30 | supported by the driver so far, so using the default resolution of 0.5 |
| 31 | degree). |
| 32 | |
| 33 | The driver provides the common sysfs-interface for temperatures (see |
| Guenter Roeck | a1fac92 | 2013-03-15 12:55:08 -0700 | [diff] [blame^] | 34 | Documentation/hwmon/sysfs-interface under Temperatures). |
| Andre Prendel | cd4e96c | 2009-06-15 18:39:49 +0200 | [diff] [blame] | 35 | |
| Guenter Roeck | a1fac92 | 2013-03-15 12:55:08 -0700 | [diff] [blame^] | 36 | The TMP411 and TMP431 chips are compatible with TMP401. TMP411 provides |
| 37 | some additional features. |
| Andre Prendel | cd4e96c | 2009-06-15 18:39:49 +0200 | [diff] [blame] | 38 | |
| 39 | * Minimum and Maximum temperature measured since power-on, chip-reset |
| 40 | |
| 41 | Exported via sysfs attributes tempX_lowest and tempX_highest. |
| 42 | |
| 43 | * Reset of historical minimum/maximum temperature measurements |
| 44 | |
| 45 | Exported via sysfs attribute temp_reset_history. Writing 1 to this |
| 46 | file triggers a reset. |