Date: Mon, 04 Jul 2016 11:55:08 +0300 From: Vladimir Kondratyev <wulf@cicgroup.ru> To: Matthias Apitz <guru@unixarea.de>, freebsd-mobile@freebsd.org Cc: owner-freebsd-mobile@freebsd.org Subject: Re: psm(4) support for Elantech touchpads Message-ID: <a0404ef5cff678023e4cdb1f8850ad1c@localhost> In-Reply-To: <6d9d3a0a34a740e76c644f4154c02576@localhost> References: <20160703185028.GA2151@c720-r292778-amd64> <6d9d3a0a34a740e76c644f4154c02576@localhost>
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On 2016-07-04 00:15, Vladimir Kondratyev wrote: > On 2016-07-03 21:50, Matthias Apitz wrote: >> Hello Vladimir, >> >> I own an Acer C720 (aka Chromebook) which worked fine concerning the >> touchpad with the cyapa driver in CURRENT. After a repair in Acer.com >> they said that they have had to change the keyboard and the touchpad >> and >> it now does not attach anymore to the cyapa.ko; it seems that it was >> replace by an Elan TP and while googlöing for support I found your >> posting from September 2015. I have applied the patch to r292778 but >> the >> code is not walked through because it says on verbose boot: >> >> atkbd0: [GIANT-LOCKED] >> random: harvesting attach, 8 bytes (4 bits) from atkbd0 >> psm0: unable to allocate IRQ >> >> Any ideas about this? Thanks in advance >> >> matthias > > Hi, Matthias > > I`m afraid that device resource management is not what I`m familiar > with. Sorry. > Mouse type detection starts 200 lines below IRQ initialization so this > message should not depend on my patch. > Quick googling shows that this is most probably an ACPI issue but that > all I was able to find > > WBR, Vladimir Kondratyev > After some investigations its turned out that some modern ElanTPs use I2C interface not PS/2 so they can not be handled with my patch. Its necessary to port new driver from Linux https://lwn.net/Articles/496137/ or from OpenBSD where it has name imt(4)
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