Re: [PATCH] Input: goodix - preliminary support for GT801-2+1

[Dmitry Torokhov <dmitry.torokhov@gmail.com>]

On Sun, Apr 05, 2015 at 06:04:24PM +0200, Bastien Nocera wrote:
> On Sun, 2015-04-05 at 00:08 +0300, Priit Laes wrote:
> > This patch implements GT801x2 touchscreen support.
> > Unfortunately, there is a big difference between GT801 and GT9xx 
> > series
> > chips, therefore some advice is needed on how to proceed.
> > 
> > Differences between GT801x2 and GT9xx series:
> > 
> > 1. I2C registers: 1 byte (GT801x2) vs 2 bytes (GT9xx)
> > 2. Different configuration layout and version info
> > 3. Different touch report protocol
> 
> That doesn't seem like an awful lot of differences. Approximately 80 
> line changes for 500 lines of driver code. You could add an enum for 
> the 8xx and 9xx types near the top, add that as driver data in the 
> match arrays (both the ACPI and OF ones). Then have if statements 
> choose the correct init, read and report functions.
> 
> I would think that that would grow the driver by a further 50 lines, 
> which would certainly be acceptable.
> 
> Don't forget to add your name to the copyright header mentioning 
> you're the author for the 8xx support :)
> 
> > Signed-off-by: Priit Laes <plaes@plaes.org>
> 
> There's really no need to sign it off if you know it's not going to be 
> accepted upstream ;)

Actually I think it is still useful: that means that somebody else can
use the patch as a base for their work without any concerns even if
original author did not see it through upstream acceptance for some
reason.

Thanks.

-- 
Dmitry