linux-kernel - Re: [RFC PATCH 0/1] input/touchscreen: Synaptics Touchscreen Driver

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Message-ID: <d6200be21003222004g2e2a1000ja65fc3f80f9fad78@mail.gmail.com>
Date:	Mon, 22 Mar 2010 20:04:09 -0700
From:	Arve Hjønnevåg <arve@...roid.com>
To:	Christopher Heiny <cheiny@...aptics.com>
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Jean Delvare <khali@...ux-fr.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Linux Input <linux-input@...r.kernel.org>,
	Allie Xiong <axiong@...aptics.com>,
	William Manson <wmanson@...aptics.com>
Subject: Re: [RFC PATCH 0/1] input/touchscreen: Synaptics Touchscreen Driver

On Mon, Mar 22, 2010 at 7:07 PM, Christopher Heiny <cheiny@...aptics.com> wrote:
...
> There are two existing drivers for similar Synaptics devices in the
> current kernel tree (excluding the PS/2 touchpad driver).  These are:
>
> ./linux-2.6/drivers/input/mouse/synaptics_i2c.c
>      A driver for the Exeda 15mm touchpad, written by Mike Rapoport
>      <mike@...pulab.co.il> and Igor Grinberg <grinberg@...pulab.co.il>
>
> ./linux-2.6/drivers/staging/dream/synaptics_i2c_rmi.c
>      A driver for the HTC Dream ClearPad, written by Arve Hjønnevåg
>      <arve@...roid.com>
>
> We have not extended these drivers for a couple of reasons.  First, the
> two drivers are specific to particular Synaptics products, and it is our
> desire to produce a general solution that takes advantage of the 'self
> describing' features of products that use the RMI protocol.
>

Do you plan to add platform data to align the reported touchscreen
data with the screen behind it, or do the new hardware allow the the
firmware handle this? In the past we even needed separate parameters
for different firmware versions (seen in
drivers/staging/dream/synaptics_i2c_rmi.h).

-- 
Arve Hjønnevåg
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