Re: [PATCH] Add tsc2007 based touchscreen driver.

From: David Brownell
Date: Wed Dec 03 2008 - 15:36:58 EST

On Wednesday 03 December 2008, Trilok Soni wrote:
> Adding linux-omap mailing list. Sometime I am thinking that same chip
> might have interface to be connected on another board/cpu through SPI
> too, so in this case we will have two drivers doing the same thing and
> difference is  just a change of the bus interface.

Is this chip an example of that? It's I2C-only, and a quick
scan of TI's touchscreen chip page didn't show a sibling chip
with a logically-identical interface using SPI.

> We should do something v4l2_subdev framework right now going on on
> v4l2 mailing list to abstract the sensor drivers from bus.

I'll disagree. When it's needed, this is easy to do ... bus
glue talking to chip-specific code, and including some kind of
bus-specific register access wrapper. No framework necessary,
just straightforward design for any such drivers.

- Dave
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