| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame] | 1 | Kernel driver tmp108 |
| 2 | ==================== |
| 3 | |
| 4 | Supported chips: |
| 5 | * Texas Instruments TMP108 |
| 6 | Prefix: 'tmp108' |
| 7 | Addresses scanned: none |
| 8 | Datasheet: http://www.ti.com/product/tmp108 |
| 9 | |
| 10 | Author: |
| 11 | John Muir <john@jmuir.com> |
| 12 | |
| 13 | Description |
| 14 | ----------- |
| 15 | |
| 16 | The Texas Instruments TMP108 implements one temperature sensor. An alert pin |
| 17 | can be set when temperatures exceed minimum or maximum values plus or minus a |
| 18 | hysteresis value. (This driver does not support interrupts for the alert pin, |
| 19 | and the device runs in comparator mode.) |
| 20 | |
| 21 | The sensor is accurate to 0.75C over the range of -25 to +85 C, and to 1.0 |
| 22 | degree from -40 to +125 C. Resolution of the sensor is 0.0625 degree. The |
| 23 | operating temperature has a minimum of -55 C and a maximum of +150 C. |
| 24 | Hysteresis values can be set to 0, 1, 2, or 4C. |
| 25 | |
| 26 | The TMP108 has a programmable update rate that can select between 8, 4, 1, and |
| 27 | 0.5 Hz. |
| 28 | |
| 29 | By default the TMP108 reads the temperature continuously. To conserve power, |
| 30 | the TMP108 has a one-shot mode where the device is normally shut-down. When a |
| 31 | one shot is requested the temperature is read, the result can be retrieved, |
| 32 | and then the device is shut down automatically. (This driver only supports |
| 33 | continuous mode.) |
| 34 | |
| 35 | The driver provides the common sysfs-interface for temperatures (see |
| 36 | Documentation/hwmon/sysfs-interface under Temperatures). |