Re: CVS commit: src/sys/arch/sparc64/dev

[Tobias Nygren <tnn%NetBSD.org@localhost>]

On Sat, 24 Oct 2020 15:16:39 +0000
Julian Coleman <jdc%netbsd.org@localhost> wrote:

> Module Name:	src
> Committed By:	jdc
> Date:		Sat Oct 24 15:16:39 UTC 2020
> 
> Modified Files:
> 	src/sys/arch/sparc64/dev: pcf8591_envctrl.c
> 
> Log Message:
> Add support for automatically changing the CPU fan speed on the E250 in a
> similar way to the SB1000/SB2000.
> The fan control information was determined by experiment, as it's only
> partially available in OFW.
> Hardcode the missing information for E250 fan control into the driver
> (it should be possible to support the E450 in future too).

If you're interested there is an older version[1] of envctrl in the
Attic that might be relevant to use for reference. It supported fan
speed controls on E450. IIRC I got some of the magic constants from
OpenSolaris. Sadly I don't own an E450 any more.

[1] cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/sys/arch/sparc64/dev/Attic/envctrl.c?rev=1.11&content-type=text/plain&only_with_tag=MAIN