nct7904.rst (1656B)
1Kernel driver nct7904 2===================== 3 4Supported chip: 5 6 * Nuvoton NCT7904D 7 8 Prefix: nct7904 9 10 Addresses: I2C 0x2d, 0x2e 11 12 Datasheet: Publicly available at Nuvoton website 13 14 http://www.nuvoton.com/ 15 16Author: Vadim V. Vlasov <vvlasov@dev.rtsoft.ru> 17 18 19Description 20----------- 21 22The NCT7904D is a hardware monitor supporting up to 20 voltage sensors, 23internal temperature sensor, Intel PECI and AMD SB-TSI CPU temperature 24interface, up to 12 fan tachometer inputs, up to 4 fan control channels 25with SmartFan. 26 27 28Sysfs entries 29------------- 30 31Currently, the driver supports only the following features: 32 33======================= ======================================================= 34in[1-20]_input Input voltage measurements (mV) 35 36fan[1-12]_input Fan tachometer measurements (rpm) 37 38temp1_input Local temperature (1/1000 degree, 39 0.125 degree resolution) 40 41temp[2-9]_input CPU temperatures (1/1000 degree, 42 0.125 degree resolution) 43 44pwm[1-4]_enable R/W, 1/2 for manual or SmartFan mode 45 Setting SmartFan mode is supported only if it has been 46 previously configured by BIOS (or configuration EEPROM) 47 48pwm[1-4] R/O in SmartFan mode, R/W in manual control mode 49======================= ======================================================= 50 51The driver checks sensor control registers and does not export the sensors 52that are not enabled. Anyway, a sensor that is enabled may actually be not 53connected and thus provide zero readings. 54 55 56Limitations 57----------- 58 59The 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...