projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 4d420a6a AJ |
1 | Kernel driver max31785 |
| 2 | ====================== | |
| 3 | ||
| 4 | Supported chips: | |
| 5 | * Maxim MAX31785, MAX31785A | |
| 6 | Prefix: 'max31785' or 'max31785a' | |
| 7 | Addresses scanned: - | |
| 8 | Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX31785.pdf | |
| 9 | ||
| 10 | Author: Andrew Jeffery <andrew@aj.id.au> | |
| 11 | ||
| 12 | Description | |
| 13 | ----------- | |
| 14 | ||
| 15 | The Maxim MAX31785 is a PMBus device providing closed-loop, multi-channel fan | |
| 16 | management with temperature and remote voltage sensing. Various fan control | |
| 17 | features are provided, including PWM frequency control, temperature hysteresis, | |
| 18 | dual tachometer measurements, and fan health monitoring. | |
| 19 | ||
| 20 | For dual rotor fan configuration, the MAX31785 exposes the slowest rotor of the | |
| 21 | two in the fan[1-4]_input attributes. | |
| 22 | ||
| 23 | Usage Notes | |
| 24 | ----------- | |
| 25 | ||
| 26 | This driver does not probe for PMBus devices. You will have to instantiate | |
| 27 | devices explicitly. | |
| 28 | ||
| 29 | Sysfs attributes | |
| 30 | ---------------- | |
| 31 | ||
| 32 | fan[1-4]_alarm Fan alarm. | |
| 33 | fan[1-4]_fault Fan fault. | |
| 34 | fan[1-4]_input Fan RPM. | |
| 35 | ||
| 36 | in[1-6]_crit Critical maximum output voltage | |
| 37 | in[1-6]_crit_alarm Output voltage critical high alarm | |
| 38 | in[1-6]_input Measured output voltage | |
| 39 | in[1-6]_label "vout[18-23]" | |
| 40 | in[1-6]_lcrit Critical minimum output voltage | |
| 41 | in[1-6]_lcrit_alarm Output voltage critical low alarm | |
| 42 | in[1-6]_max Maximum output voltage | |
| 43 | in[1-6]_max_alarm Output voltage high alarm | |
| 44 | in[1-6]_min Minimum output voltage | |
| 45 | in[1-6]_min_alarm Output voltage low alarm | |
| 46 | ||
| 47 | temp[1-11]_crit Critical high temperature | |
| 48 | temp[1-11]_crit_alarm Chip temperature critical high alarm | |
| 49 | temp[1-11]_input Measured temperature | |
| 50 | temp[1-11]_max Maximum temperature | |
| 51 | temp[1-11]_max_alarm Chip temperature high alarm |