Input: goodix - check the 'buffer status' bit before reading data
authorPaul Cercueil <paul@crapouillou.net>
Wed, 6 May 2015 23:52:13 +0000 (16:52 -0700)
committerDmitry Torokhov <dmitry.torokhov@gmail.com>
Wed, 6 May 2015 23:54:25 +0000 (16:54 -0700)
commit5f6f117c12a3fb25ecadd6dfcdd1a3a431269ade
tree241808c71b7ccde22694dd564c06a7fc4970b79f
parentc615dcb6d13e6db3083507114fa3696be98d5211
Input: goodix - check the 'buffer status' bit before reading data

The MSB of the first byte read via I2C at the coordinates address
indicates whether the data is valid or ready (called "buffer status" in
the datasheets) when an interrupt is raised. Previously, this bit was
ignored, which resulted in a lot of incorrect detections of "finger
removed" events.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Acked-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
drivers/input/touchscreen/goodix.c