projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 007e433c GR |
1 | .. SPDX-License-Identifier: GPL-2.0 |
| 2 | ||
| 3 | Kernel driver tmp464 | |
| 4 | ==================== | |
| 5 | ||
| 6 | Supported chips: | |
| 7 | ||
| 8 | * Texas Instruments TMP464 | |
| 9 | ||
| 10 | Prefix: 'tmp464' | |
| 11 | ||
| 12 | Addresses scanned: I2C 0x48, 0x49, 0x4a and 0x4b | |
| 13 | ||
| 14 | Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp464.html | |
| 15 | ||
| 16 | * Texas Instruments TMP468 | |
| 17 | ||
| 18 | Prefix: 'tmp468' | |
| 19 | ||
| 20 | Addresses scanned: I2C 0x48, 0x49, 0x4a and 0x4b | |
| 21 | ||
| 22 | Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp468.html | |
| 23 | ||
| 24 | Authors: | |
| 25 | ||
| 26 | Agathe Porte <agathe.porte@nokia.com> | |
| 27 | Guenter Roeck <linux@roeck-us.net> | |
| 28 | ||
| 29 | Description | |
| 30 | ----------- | |
| 31 | ||
| 32 | This driver implements support for Texas Instruments TMP464 and TMP468 | |
| 33 | temperature sensor chips. TMP464 provides one local and four remote | |
| 34 | sensors. TMP468 provides one local and eight remote sensors. | |
| 35 | Temperature is measured in degrees Celsius. The chips are wired over | |
| 36 | I2C/SMBus and specified over a temperature range of -40 to +125 degrees | |
| 37 | Celsius. Resolution for both the local and remote channels is 0.0625 | |
| 38 | degree C. | |
| 39 | ||
| 40 | The chips support only temperature measurements. The driver exports | |
| 41 | temperature values, limits, and alarms via the following sysfs files: | |
| 42 | ||
| 43 | **temp[1-9]_input** | |
| 44 | ||
| 45 | **temp[1-9]_max** | |
| 46 | ||
| 47 | **temp[1-9]_max_hyst** | |
| 48 | ||
| 49 | **temp[1-9]_max_alarm** | |
| 50 | ||
| 51 | **temp[1-9]_crit** | |
| 52 | ||
| 53 | **temp[1-9]_crit_alarm** | |
| 54 | ||
| 55 | **temp[1-9]_crit_hyst** | |
| 56 | ||
| 57 | **temp[2-9]_offset** | |
| 58 | ||
| 59 | **temp[2-9]_fault** | |
| 60 | ||
| 61 | Each sensor can be individually disabled via Devicetree or from sysfs | |
| 62 | via: | |
| 63 | ||
| 64 | **temp[1-9]_enable** | |
| 65 | ||
| 66 | If labels were specified in Devicetree, additional sysfs files will | |
| 67 | be present: | |
| 68 | ||
| 69 | **temp[1-9]_label** | |
| 70 | ||
| 71 | The update interval is configurable with the following sysfs attribute. | |
| 72 | ||
| 73 | **update_interval** |