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hwmon: Driver for NCT6683D

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Nuvoton NCT6683D is an eSIO with hardware monitoring capabilities.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2014-04-06 08:57:20 -07:00
parent c254ffdefc
commit 41082d66bf
4 changed files with 1523 additions and 0 deletions
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Documentation/hwmon/nct6683 Normal file
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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

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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

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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

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drivers/hwmon/nct6683.c Normal file
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