Re: kern/58302: Newer Elantech touchpad is not being registered by pms

["Marc Coquand" <marc@mccd.space>]

Heya,

Adding some more debugging info.

It seems that T480s only uses some limited i2c functionality, and is in
fact a PS/2 touchpad, which would explain why the patch doesn't work.

My suspicion now is that the Elantech driver that is built into NetBSD
only supports version 2, whereas the version used by T480s is version
4. I found this by checking dmesg on linux:

[    6.292103] psmouse serio1: elantech: assuming hardware version 4
(with firmware version 0x7f3001)

So the solution to this could be to port over the elantech v4
functionality from OpenBSD or FreeBSD, since they both support this model.

-- Marc

On Sat Jun 1, 2024 at 6:55 PM -05, Marc Coquand wrote:
> The following reply was made to PR kern/58302; it has been noted by GNATS