> -----Original Message-----
> From: Dmitry Torokhov [mailto:[email protected]]
> Sent: Friday, November 20, 2009 10:32 PM
> To: Hiremath, Vaibhav
> Cc: [email protected]; [email protected]
> Subject: Re: [PATCH 2/3] Input:TouchScreen: Introduce TSC2004 driver
> support
>
> Hi Vaibhav,
>
> On Thu, Nov 19, 2009 at 08:16:40PM +0530, [email protected] wrote:
> > From: Vaibhav Hiremath <[email protected]>
> >
> > Signed-off-by: Vaibhav Hiremath <[email protected]>
>
>
> If I do:
>
> sed 's/2004/2007/g' drivers/input/touchscreen/tsc2004.c | diff -u
> drivers/input/touchscreen/tsc2007.c -
>
> the diff is miniscule so why can't TSC2004 support be simply added
> to
> TSC2007 driver?
[Hiremath, Vaibhav] The driver which I submitted is the basic version, there is
lot which required to be added here for complete support of TSC2004 features. I
tried to summarize it (in short) here -
- TSC2004 supports register based control, whereas TSC2007 is command
based control.
- TSC2004 supports 2 different modes of operation, whereas there is
nothing like this in TSc2007
- There are lots of configuration options TSC2004 provides.
Again there are differences like command/address formats
TSC2004 -
----------
BIT NAME DESCRIPTION
D7 Control Byte ID 1
D6-D3 C3-C0 Converter function select
D2 M 1: 12 Bit 0: 10 bit
D1 SWRST Software Reset.
D0 STS Stop bit for all converter functions.
TSC2007 -
---------
BIT NAME DESCRIPTION
D7-D4 C3-C0 All Converter Function Select bits
D3-D2 PD1-PD0 Power down bit control
D1 M 1: 8-bit 0: 12 bit
D0 X Don't care.
So in my opinion we must not try to merge drivers for these two devices. I hope
this information clears all the confusion.
Thanks,
Vaibhav
>
> Thanks.
>
> --
> Dmitry
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