mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
7ebd8b66dd
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>
67 lines
1.6 KiB
ReStructuredText
67 lines
1.6 KiB
ReStructuredText
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...
|