linux-kernel - Re: [PATCH 0/1] input: keyboard: add qci keyboard driver

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Message-ID: <20100830215556.GC28865@core.coreip.homeip.net>
Date:	Mon, 30 Aug 2010 14:55:56 -0700
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Neil Leeder <nleeder@...eaurora.org>
Cc:	"linux-input@...r.kernel.org" <linux-input@...r.kernel.org>,
	"linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Horace Fu <horace.fu@...ntatw.com>, Hsin.Wu@...ntatw.com,
	mcuos.com@...il.com
Subject: Re: [PATCH 0/1] input: keyboard: add qci keyboard driver

On Mon, Aug 30, 2010 at 02:22:10PM -0400, Neil Leeder wrote:
> On 8/27/2010 6:33 PM, Dmitry Torokhov wrote:
> >No, this is crazy... This is a twin-brother of the touchpad driver and
> >I really do not understand why chip claiming to have PS/2 interface
> >(3 ports if I were to believe the diagram) would not allow us talk to
> >the devices...
> 
> I didn't provide a key bit of information, sorry. The keyboard is
> not attached to the EC's PS/2 port. It is on a matrix of GPIOs.

And still you are using only one GPIO in your driver? While WPCE775x
does seem to have matrix keypad support I think that you are using one
of the 3 PS/2 ports, like your touchpad does.

> 
> I was trying to explain that even though the firmware on the EC uses
> 0xF4 written over i2c to initialize it, it doesn't appear to support
> other PS/2 commands directed to the keyboard on the GPIO matrix.
> 

The device is initialized with 0xf4; the device is supposed to respond
with 0xfa; I wonder what scancodes the device reports... It smells
strongly of PS/2.

Also, it is not controller that supports PS/2 commands but rather the
device itself so I am still hopeful that we could make use of the
standard drivers.

Wan, you worked at Nuvoton, do you know if wpce775 fully supports PS/2
interface? 

-- 
Dmitry
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