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| author | Guenter Roeck <linux@roeck-us.net> | 2014-04-06 08:57:20 -0700 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2014-05-21 16:02:27 -0700 |
| commit | 41082d66bfd6fafe001c0902bb4622d7aee6f128 (patch) | |
| tree | 8982ce666a86e8f48ff95dba0e8bd612e44a7c62 /Documentation/hwmon | |
| parent | c254ffdefc002b57f1e9eedddcb3569c0d80578f (diff) | |
| download | linux-41082d66bfd6fafe001c0902bb4622d7aee6f128.tar.bz2 | |
hwmon: Driver for NCT6683D
Nuvoton NCT6683D is an eSIO with hardware monitoring capabilities.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'Documentation/hwmon')
| -rw-r--r-- | Documentation/hwmon/nct6683 | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/Documentation/hwmon/nct6683 b/Documentation/hwmon/nct6683 new file mode 100644 index 000000000000..c1301d4300cd --- /dev/null +++ b/Documentation/hwmon/nct6683 @@ -0,0 +1,57 @@ +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 |