projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| d21ed22b GR |
1 | Kernel driver max31790 |
| 2 | ====================== | |
| 3 | ||
| 4 | Supported chips: | |
| 5 | ||
| 6 | * Maxim MAX31730 | |
| 7 | ||
| 8 | Prefix: 'max31730' | |
| 9 | ||
| 10 | Addresses scanned: 0x1c, 0x1d, 0x1e, 0x1f, 0x4c, 0x4d, 0x4e, 0x4f | |
| 11 | ||
| 12 | Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX31730.pdf | |
| 13 | ||
| 14 | Author: Guenter Roeck <linux@roeck-us.net> | |
| 15 | ||
| 16 | ||
| 17 | Description | |
| 18 | ----------- | |
| 19 | ||
| 20 | This driver implements support for Maxim MAX31730. | |
| 21 | ||
| 22 | The MAX31730 temperature sensor monitors its own temperature and the | |
| 23 | temperatures of three external diode-connected transistors. The operating | |
| 24 | supply voltage is from 3.0V to 3.6V. Resistance cancellation compensates | |
| 25 | for high series resistance in circuit-board traces and the external thermal | |
| 26 | diode, while beta compensation corrects for temperature-measurement | |
| 27 | errors due to low-beta sensing transistors. | |
| 28 | ||
| 29 | ||
| 30 | Sysfs entries | |
| 31 | ------------- | |
| 32 | ||
| 33 | =================== == ======================================================= | |
| 34 | temp[1-4]_enable RW Temperature enable/disable | |
| 35 | Set to 0 to enable channel, 0 to disable | |
| 36 | temp[1-4]_input RO Temperature input | |
| 37 | temp[2-4]_fault RO Fault indicator for remote channels | |
| 38 | temp[1-4]_max RW Maximum temperature | |
| 39 | temp[1-4]_max_alarm RW Maximum temperature alarm | |
| 40 | temp[1-4]_min RW Minimum temperature. Common for all channels. | |
| 41 | Only temp1_min is writeable. | |
| 42 | temp[1-4]_min_alarm RO Minimum temperature alarm | |
| 43 | temp[2-4]_offset RW Temperature offset for remote channels | |
| 44 | =================== == ======================================================= |