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- 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...
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