| Kernel driver nct6683 |
| ===================== |
| |
| Supported chips: |
| |
| * Nuvoton NCT6683D/NCT6686D/NCT6687D |
| |
| 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 |
| AMD BC-250 NCT6686D EC firmware version 1.0 build 07/28/21 |
| ASRock X570 NCT6683D EC firmware version 1.0 build 06/28/19 |
| ASRock X670E NCT6686D EC firmware version 1.0 build 05/19/22 |
| ASRock B650 Steel Legend WiFi NCT6686D EC firmware version 1.0 build 11/09/23 |
| MSI B550 NCT6687D EC firmware version 1.0 build 05/07/20 |
| MSI X670-P NCT6687D EC firmware version 0.0 build 09/27/22 |
| MSI X870E NCT6687D EC firmware version 0.0 build 11/13/24 |
| =============================== =============================================== |
