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Date:      Thu, 12 Sep 2019 11:39:24 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 240339] [ig4] I2C2 (touchpad bus) broken on the Google Pixelbook (Sunrise Point PCH)
Message-ID:  <bug-240339-227-4qwWx8bxe2@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-240339-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-240339-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D240339

--- Comment #17 from Vladimir Kondratyev <wulf@freebsd.org> ---
(In reply to Greg V from comment #16)
> Interesting how the other buses are fine with this, only the touchpad one=
 was broken.
That is related to buses and gates capacitance and resistance. Here you can
find what happens if SDA HOLD is set too low:=20
https://www.cypress.com/file/364871/download

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