projects / mirror_ubuntu-hirsute-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 9c947d25 | 1 | Kernel driver nct7904 |
| b04f2f7d | 2 | ===================== |
| 9c947d25 VV |
3 | |
| 4 | Supported chip: | |
| b04f2f7d | 5 | |
| 9c947d25 | 6 | * Nuvoton NCT7904D |
| b04f2f7d | 7 | |
| 9c947d25 | 8 | Prefix: nct7904 |
| b04f2f7d | 9 | |
| 9c947d25 | 10 | Addresses: I2C 0x2d, 0x2e |
| b04f2f7d | 11 | |
| 9c947d25 | 12 | Datasheet: Publicly available at Nuvoton website |
| b04f2f7d | 13 | |
| 9c947d25 VV |
14 | http://www.nuvoton.com/ |
| 15 | ||
| 16 | Author: Vadim V. Vlasov <vvlasov@dev.rtsoft.ru> | |
| 17 | ||
| 18 | ||
| 19 | Description | |
| 20 | ----------- | |
| 21 | ||
| 22 | The NCT7904D is a hardware monitor supporting up to 20 voltage sensors, | |
| 23 | internal temperature sensor, Intel PECI and AMD SB-TSI CPU temperature | |
| 24 | interface, up to 12 fan tachometer inputs, up to 4 fan control channels | |
| 25 | with SmartFan. | |
| 26 | ||
| 27 | ||
| 28 | Sysfs entries | |
| 29 | ------------- | |
| 30 | ||
| 31 | Currently, the driver supports only the following features: | |
| 32 | ||
| b04f2f7d | 33 | ======================= ======================================================= |
| 9c947d25 VV |
34 | in[1-20]_input Input voltage measurements (mV) |
| 35 | ||
| 36 | fan[1-12]_input Fan tachometer measurements (rpm) | |
| 37 | ||
| 38 | temp1_input Local temperature (1/1000 degree, | |
| 39 | 0.125 degree resolution) | |
| 40 | ||
| 41 | temp[2-9]_input CPU temperatures (1/1000 degree, | |
| 42 | 0.125 degree resolution) | |
| 43 | ||
| 0d6aaffc | 44 | pwm[1-4]_enable R/W, 1/2 for manual or SmartFan mode |
| 9c947d25 VV |
45 | Setting SmartFan mode is supported only if it has been |
| 46 | previously configured by BIOS (or configuration EEPROM) | |
| 47 | ||
| 0d6aaffc | 48 | pwm[1-4] R/O in SmartFan mode, R/W in manual control mode |
| b04f2f7d | 49 | ======================= ======================================================= |
| 9c947d25 VV |
50 | |
| 51 | The driver checks sensor control registers and does not export the sensors | |
| 52 | that are not enabled. Anyway, a sensor that is enabled may actually be not | |
| 53 | connected and thus provide zero readings. | |
| 54 | ||
| 55 | ||
| 56 | Limitations | |
| 57 | ----------- | |
| 58 | ||
| 59 | The following features are not supported in current version: | |
| 60 | ||
| 61 | - SmartFan control | |
| 62 | - Watchdog | |
| 63 | - GPIO | |
| 64 | - external temperature sensors | |
| 65 | - SMI | |
| 66 | - min/max values | |
| 67 | - many other... |