Re: [PATCH 1/1] Force ELAN06FA touchpad I2C bus freq to 100KHz

Mika Westerberg
2025-01-13T06:49:51Z

On Sat, Jan 11, 2025 at 10:05:23AM -0600, R Ha wrote:
> Hi,
>
> I updated the description, please let me know if it's covered everything.

Thanks, I commented few things there.

> Just as a question, because the touchpad works well at both 100KHz and
> 1000KHz, is it better to force it to 100KHz or 1000KHz? I was
> considering that the Microsoft docs [1] specified that the frequency
> should be "no less than 400KHz", but didn't change it for now because
> the touchpad feels the same at 100KHz and 1000KHz, including for
> gestures.
>
> Is it possible that there will be any sort of compatibility issues if
> the speed is set to 1000KHz? From what I can tell, the only other
> device on I2C1 is the "Intel Smart Sound" related device, but I'm not
> exactly sure what that does or whether it will work at 1000KHz. The
> sound output itself seems to be unaffected regardless of the
> frequency, though I don't think the other device is directly related
> to sound output.

I would say 100kHz is safer, all the devices should support it even the
older ones.