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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /Documentation/hwmon/nct7904.rst | |
parent | Initial commit. (diff) | |
download | linux-upstream/5.10.209.tar.xz linux-upstream/5.10.209.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | Documentation/hwmon/nct7904.rst | 67 |
1 files changed, 67 insertions, 0 deletions
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 <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... |