From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- Documentation/hwmon/nct7904.rst | 67 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 Documentation/hwmon/nct7904.rst (limited to 'Documentation/hwmon/nct7904.rst') diff --git a/Documentation/hwmon/nct7904.rst b/Documentation/hwmon/nct7904.rst new file mode 100644 index 000000000..5b2f11158 --- /dev/null +++ b/Documentation/hwmon/nct7904.rst @@ -0,0 +1,67 @@ +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 + + +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... -- cgit v1.2.3