| Kernel driver nct7904 |
| ==================== |
| |
| Supported chip: |
| * Nuvoton NCT7904D |
| Prefix: nct7904 |
| Addresses: I2C 0x2d, 0x2e |
| Datasheet: Publicly available at Nuvoton website |
| http://www.nuvoton.com/ |
| |
| Author: Vadim V. Vlasov <vvlasov@dev.rtsoft.ru> |
| |
| |
| Description |
| ----------- |
| |
| The NCT7904D is a hardware monitor supporting up to 20 voltage sensors, |
| internal temperature sensor, Intel PECI and AMD SB-TSI CPU temperature |
| interface, up to 12 fan tachometer inputs, up to 4 fan control channels |
| with SmartFan. |
| |
| |
| Sysfs entries |
| ------------- |
| |
| Currently, the driver supports only the following features: |
| |
| in[1-20]_input Input voltage measurements (mV) |
| |
| fan[1-12]_input Fan tachometer measurements (rpm) |
| |
| temp1_input Local temperature (1/1000 degree, |
| 0.125 degree resolution) |
| |
| temp[2-9]_input CPU temperatures (1/1000 degree, |
| 0.125 degree resolution) |
| |
| pwm[1-4]_enable R/W, 1/2 for manual or SmartFan mode |
| Setting SmartFan mode is supported only if it has been |
| previously configured by BIOS (or configuration EEPROM) |
| |
| pwm[1-4] R/O in SmartFan mode, R/W in manual control mode |
| |
| The driver checks sensor control registers and does not export the sensors |
| that are not enabled. Anyway, a sensor that is enabled may actually be not |
| connected and thus provide zero readings. |
| |
| |
| Limitations |
| ----------- |
| |
| The following features are not supported in current version: |
| |
| - SmartFan control |
| - Watchdog |
| - GPIO |
| - external temperature sensors |
| - SMI |
| - min/max values |
| - many other... |
