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| author | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-04-17 06:46:29 -0300 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2019-04-17 10:37:23 -0700 |
| commit | 7ebd8b66dd9e5a0b65e5ee5e2b8e7ca382ec97b7 (patch) | |
| tree | 9db30159bd32bec125c7d49e80a79bb7c4da0c8e /Documentation/hwmon/nct7904.rst | |
| parent | b04f2f7d387b3160883c2a1f5e2285483a791e82 (diff) | |
| download | linux-7ebd8b66dd9e5a0b65e5ee5e2b8e7ca382ec97b7.tar.bz2 | |
docs: hwmon: Add an index file and rename docs to *.rst
Now that all files were converted to ReST format, rename them
and add an index.
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'Documentation/hwmon/nct7904.rst')
| -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 000000000000..5b2f111582ff --- /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... |