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Message-ID: <20121203170420.GD28682@core.coreip.homeip.net>
Date: Mon, 3 Dec 2012 09:04:21 -0800
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
To: Henrik Rydberg <rydberg@...omail.se>
Cc: Kamal Mostafa <kamal@...onical.com>, linux-input@...r.kernel.org,
linux-kernel@...r.kernel.org, David Solda <dso@...ress.com>,
Troy Abercrombia <ta@...ress.com>,
Dudley Du <dudl@...ress.com>,
Cypress Semiconductor Corporation <customercare@...ress.com>,
Kyle Fazzari <git@...tus.e4ward.com>,
Mario Limonciello <mario_limonciello@...l.com>,
Tim Gardner <tim.gardner@...onical.com>,
Herton Krzesinski <herton.krzesinski@...onical.com>
Subject: Re: [PATCH v3 2/4] input: Cypress PS/2 Trackpad psmouse driver
On Mon, Dec 03, 2012 at 08:45:20AM +0100, Henrik Rydberg wrote:
> > +/*
> > + * reset trackpad device to standard relative mode.
> > + * This is also the defalut mode when trackpad powered on.
> > + */
> > +static void cypress_reset(struct psmouse *psmouse)
> > +{
> > + struct cytp_data *cytp = psmouse->private;
> > +
> > + psmouse_reset(psmouse);
> > +
> > + CYTP_SET_MODE_BIT(CYTP_BIT_STANDARD_REL);
> > + CYTP_SET_PACKET_SIZE(3);
> > +
> > + cytp->prev_contact_cnt = 0;
> > +}
>
> I suppose it is, but is it necessary to reset to default mode?
It most likely is, as quite a few BIOSes get very upset and refuse to
shutdown/suspend/resume if they find mouse (touchpad) in state other
than bog-standard PS/2 mode. So psmouse_reset() is needed, the rest is
not so much as the device supposed to be inactive from this point on.
Thanks.
--
Dmitry
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