Re: [PATCH 0/2] hwmon: (nct6683) Add fan control support for MSI boards with NCT6687D-R

[Hamza Mahfooz <someguy@effective-light.com>]

On Sun, Oct 04, 2026 at 11:32:48AM -0400, Hamza Mahfooz wrote:
> Recent MSI boards (customer ID 0x20d) use an NCT6687D-R, whose fan
> control registers differ from the ones used on Mitac boards, the only
> boards for which the driver supports fan control so far. In addition,
> the system fans of these boards are connected to channels 10-15, whose
> duty cycle the driver does not report.
> 
> This series adds fan control support for these boards, based on the
> register map reverse engineered by the LibreHardwareMonitor project [1],
> which uses it on MSI 800-series boards.
> 
> Patch 1 reports the duty cycle of the system fans, and patch 2 adds fan
> control support for the CPU, pump and system fan headers. 
> 
> Tested on an MSI PRO B850-P WIFI (MS-7E56, BIOS 2.A93, NCT6687D EC
> firmware version 0.0 build 04/18/25), on top of kernel v7.3-rc5. Fan
> control is available on pwm1, pwm2 and pwm13 to pwm16 on this board.
> 
> [1] https://github.com/LibreHardwareMonitor/LibreHardwareMonitor/pull/2294
> 
> Hamza Mahfooz (2):
>   hwmon: (nct6683) Report the duty cycle of NCT6687D-R system fans
>   hwmon: (nct6683) Add fan control support for MSI boards with
>     NCT6687D-R
> 
>  Documentation/hwmon/nct6683.rst |  17 +++
>  drivers/hwmon/nct6683.c         | 233 +++++++++++++++++++++++++++++++-
>  2 files changed, 244 insertions(+), 6 deletions(-)
> 
> -- 
> 2.56.0
> 

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