Re: [RFC PATCH 00/11] input: Synaptics RMI4 Touchscreen Driver

[Dmitry Torokhov]

On Wed, Dec 21, 2011 at 06:09:51PM -0800, Christopher Heiny wrote:
> This patch implements a driver supporting Synaptics ClearPad and other
> touchscreen sensors that use the RMI4 protocol, as defined here:
> 
>     http://www.synaptics.com/sites/default/files/511-000136-01-Rev-E-RMI4%20Intrfacing%20Guide.pdf
> 
> as well as successor documents that haven't made their way through to
> publication yet.
> 
> This code represents a complete refactoring and rewrite of the previously
> submitted patches, and supersedes all those patches.  We believe that all
> outstanding issues arising from the previous submissions have been addressed.
> However, because of the quantity of new code, we are submitting this patch
> as an RFC and requesting feedback from the kernel community.
> 
> 
> This patch is against the v2.6.38 tag of Linus' kernel tree, commit
> 521cb40b0c44418a4fd36dc633f575813d59a43d.
> 
> 
> Included in this patch are:
>     - full support for an RMI virtual bus as a standard kernel bus
> 
>     - physical layer implementations for I2C and SPI
> 
>     - function implementations for the following RMI4 functions:
>         * F01 device control
>         * F09 self test (aka BIST)
>         * F11 multifinger pointing
>         * F19 capacitive buttons
>         * F34 device reflash
>         * F54 analog data reporting
> 
>     - character device access to the RMI4 register map via rmidev

Could you please tell me why this facility is needed?

-- 
Dmitry
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