1 Kernel driver nct6683 2 ===================== 3 4 Supported chips: 5 6 * Nuvoton NCT6683D/NCT6687D 7 8 Prefix: 'nct6683' 9 10 Addresses scanned: ISA address retrieved from Super I/O registers 11 12 Datasheet: Available from Nuvoton upon request 13 14 Authors: 15 16 Guenter Roeck <linux@roeck-us.net> 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 58 =============== =============================================== 59 Board Firmware version 60 =============== =============================================== 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 64 ASRock X570 NCT6683D EC firmware version 1.0 build 06/28/19 65 ASRock X670E NCT6686D EC firmware version 1.0 build 05/19/22 66 MSI B550 NCT6687D EC firmware version 1.0 build 05/07/20 67 MSI X670-P NCT6687D EC firmware version 0.0 build 09/27/22 68 =============== ===============================================
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