projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 41082d66 GR |
1 | Kernel driver nct6683 |
| 2 | ===================== | |
| 3 | ||
| 4 | Supported chips: | |
| b04f2f7d | 5 | |
| 41082d66 | 6 | * Nuvoton NCT6683D |
| b04f2f7d | 7 | |
| 41082d66 | 8 | Prefix: 'nct6683' |
| b04f2f7d | 9 | |
| 41082d66 | 10 | Addresses scanned: ISA address retrieved from Super I/O registers |
| b04f2f7d | 11 | |
| 41082d66 GR |
12 | Datasheet: Available from Nuvoton upon request |
| 13 | ||
| 14 | Authors: | |
| b04f2f7d MCC |
15 | |
| 16 | Guenter Roeck <linux@roeck-us.net> | |
| 41082d66 GR |
17 | |
| 18 | Description | |
| 19 | ----------- | |
| 20 | ||
| 21 | This driver implements support for the Nuvoton NCT6683D eSIO chip. | |
| 22 | ||
| 23 | The chips implement up to shared 32 temperature and voltage sensors. | |
| 24 | It supports up to 16 fan rotation sensors and up to 8 fan control engines. | |
| 25 | ||
| 26 | Temperatures are measured in degrees Celsius. Measurement resolution is | |
| 27 | 0.5 degrees C. | |
| 28 | ||
| 29 | Voltage sensors (also known as IN sensors) report their values in millivolts. | |
| 30 | ||
| 31 | Fan rotation speeds are reported in RPM (rotations per minute). | |
| 32 | ||
| 33 | Usage Note | |
| 34 | ---------- | |
| 35 | ||
| 36 | Limit register locations on Intel boards with EC firmware version 1.0 | |
| 37 | build date 04/03/13 do not match the register locations in the Nuvoton | |
| 38 | datasheet. Nuvoton confirms that Intel uses a special firmware version | |
| 39 | with different register addresses. The specification describing the Intel | |
| 40 | firmware is held under NDA by Nuvoton and Intel and not available | |
| 41 | to the public. | |
| 42 | ||
| 43 | Some of the register locations can be reverse engineered; others are too | |
| 44 | well hidden. Given this, writing any values from the operating system is | |
| 45 | considered too risky with this firmware and has been disabled. All limits | |
| 46 | must all be written from the BIOS. | |
| 47 | ||
| 48 | The driver has only been tested with the Intel firmware, and by default | |
| 49 | only instantiates on Intel boards. To enable it on non-Intel boards, | |
| 50 | set the 'force' module parameter to 1. | |
| 51 | ||
| 52 | Tested Boards and Firmware Versions | |
| 53 | ----------------------------------- | |
| 54 | ||
| 55 | The driver has been reported to work with the following boards and | |
| 56 | firmware versions. | |
| 57 | ||
| b04f2f7d | 58 | =============== =============================================== |
| 41082d66 | 59 | Board Firmware version |
| b04f2f7d | 60 | =============== =============================================== |
| 41082d66 GR |
61 | Intel DH87RL NCT6683D EC firmware version 1.0 build 04/03/13 |
| 62 | Intel DH87MC NCT6683D EC firmware version 1.0 build 04/03/13 | |
| 63 | Intel DB85FL NCT6683D EC firmware version 1.0 build 04/03/13 | |
| b04f2f7d | 64 | =============== =============================================== |