Guenter Roeck | d21ed22 | 2019-11-23 11:11:26 -0800 | [diff] [blame] | 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 | =================== == ======================================================= |