Re: [PATCH] hx4700: fix hx4700 touchscreen pressure values

Paul Parsons
2009-11-18T00:33:05Z

> Does pressure actually work as expected -- that is not inverted?
> Because I need this patch on spitz... but it may break your
> machine...

You are right, the pressure values were being inverted on my hx4700.
Pressing hard generates somewhat lower Rt values than pressing lightly.

Since typical hx4700 Rt values are close to (pressure_max/2) anyway,
the inverted and non-inverted values were not very different.
For example:

Rt ts->pressure_max-Rt
599 425
562 462
588 436
570 454

So by all means submit your ads7846.c patch; it will not break hx4700.