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Commit 41082d66 authored by Guenter Roeck's avatar Guenter Roeck
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hwmon: Driver for NCT6683D 



Nuvoton NCT6683D is an eSIO with hardware monitoring capabilities.

Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent c254ffde

Documentation/hwmon/nct6683

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Kernel driver nct6683

=====================



Supported chips:

  * Nuvoton NCT6683D

    Prefix: 'nct6683'

    Addresses scanned: ISA address retrieved from Super I/O registers

    Datasheet: Available from Nuvoton upon request



Authors:

        Guenter Roeck <linux@roeck-us.net>



Description

-----------



This driver implements support for the Nuvoton NCT6683D eSIO chip.



The chips implement up to shared 32 temperature and voltage sensors.

It supports up to 16 fan rotation sensors and up to 8 fan control engines.



Temperatures are measured in degrees Celsius. Measurement resolution is

0.5 degrees C.



Voltage sensors (also known as IN sensors) report their values in millivolts.



Fan rotation speeds are reported in RPM (rotations per minute).



Usage Note

----------



Limit register locations on Intel boards with EC firmware version 1.0

build date 04/03/13 do not match the register locations in the Nuvoton

datasheet. Nuvoton confirms that Intel uses a special firmware version

with different register addresses. The specification describing the Intel

firmware is held under NDA by Nuvoton and Intel and not available

to the public.



Some of the register locations can be reverse engineered; others are too

well hidden. Given this, writing any values from the operating system is

considered too risky with this firmware and has been disabled. All limits

must all be written from the BIOS.



The driver has only been tested with the Intel firmware, and by default

only instantiates on Intel boards. To enable it on non-Intel boards,

set the 'force' module parameter to 1.



Tested Boards and Firmware Versions

-----------------------------------



The driver has been reported to work with the following boards and

firmware versions.



Board		Firmware version

---------------------------------------------------------------

Intel DH87RL	NCT6683D EC firmware version 1.0 build 04/03/13

Intel DH87MC	NCT6683D EC firmware version 1.0 build 04/03/13

Intel DB85FL	NCT6683D EC firmware version 1.0 build 04/03/13

drivers/hwmon/Kconfig

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@@ -1065,6 +1065,16 @@ config SENSORS_NTC_THERMISTOR 
	  This driver can also be built as a module.  If so, the module

	  will be called ntc-thermistor.



config SENSORS_NCT6683

	tristate "Nuvoton NCT6683D"

	depends on !PPC

	help

	  If you say yes here you get support for the hardware monitoring

	  functionality of the Nuvoton NCT6683D eSIO chip.



	  This driver can also be built as a module.  If so, the module

	  will be called nct6683.



config SENSORS_NCT6775

	tristate "Nuvoton NCT6775F and compatibles"

	depends on !PPC

drivers/hwmon/Makefile

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@@ -114,6 +114,7 @@ obj-$(CONFIG_SENSORS_MAX6650) += max6650.o 
obj-$(CONFIG_SENSORS_MAX6697)	+= max6697.o

obj-$(CONFIG_SENSORS_MC13783_ADC)+= mc13783-adc.o

obj-$(CONFIG_SENSORS_MCP3021)	+= mcp3021.o

obj-$(CONFIG_SENSORS_NCT6683)	+= nct6683.o

obj-$(CONFIG_SENSORS_NCT6775)	+= nct6775.o

obj-$(CONFIG_SENSORS_NTC_THERMISTOR)	+= ntc_thermistor.o

obj-$(CONFIG_SENSORS_PC87360)	+= pc87360.o

drivers/hwmon/nct6683.c

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