linux-kernel - Re: [PATCH] eeepc-wmi: Add support for T101MT "Express Gate" key

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Date:	Thu, 24 Mar 2011 14:57:20 -0500
From:	Seth Forshee <seth.forshee@...onical.com>
To:	Chris Bagwell <chris@...bagwell.com>,
	Corentin Chary <corentin.chary@...il.com>
Cc:	Matthew Garrett <mjg@...hat.com>,
	acpi4asus-user@...ts.sourceforge.net,
	platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] eeepc-wmi: Add support for T101MT "Express Gate" key

On Thu, Mar 24, 2011 at 09:00:14AM -0500, Chris Bagwell wrote:
> On Thu, Mar 24, 2011 at 8:40 AM, Corentin Chary
> <corentin.chary@...il.com> wrote:
> >> I would suggest sending BTN_HOME upon button release 0xe5 (not press
> >> 0xe4 and do the autorelease because of it) and BTN_PROG2 on
> >> press-and-hold 0xea.
> >>
> >> If you press-and-hold, does it still send the 0xe5 upon release?  That
> >> could complicate things so that both button events do not get sent.
> >>
> >> I'm not sure what BTN_HOME is commonly used for.  This button does
> >> sound like a HOME button in iPad sense but not in web browser sense.
> >
> > Except the fact that I don't find BTN_HOME in inpout.h, that's seems a
> > better idea, forget what I've said earlier.
> 
> Ha... Sorry, I had buttons on my brain.  I meant KEY_HOME as you suggested.

Really? Isn't KEY_HOME the home key on a standard keyboard?

> > 0xe4 -> KEY_IGNORE
> > 0xe5 -> KEY_HOME
> > 0xea -> KEY_PROG2, (or BTN_TASK to copy android/iOS ?)
> 
> From a quick google, I couldn't finding any specific meaning of
> BTN_TASK but it looks like xf86-input-evdev turns it into a button
> press so we may not want that one.
> 
> I've no idea of best values but those are pretty close.

I'm still not sure what key codes are best either. I've implemented this
approach, and I went with BTN_TASK and KEY_PROG2, but I'm getting the
idea that BTN_TASK was intended for a mouse button so I'm not really
sure if it's a good choice or not. I'll follow up with the patches.

Thanks for the feedback so far.

Seth

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