Input: edt-ft5x06 - ignore touchdown events

The chip may report invalid coordinates on touchdown events, so don't
report the initial touchdown event.

Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Acked-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c
index fd18e580870a..dd94b9eea6e7 100644
--- a/drivers/input/touchscreen/edt-ft5x06.c
+++ b/drivers/input/touchscreen/edt-ft5x06.c
@@ -176,6 +176,10 @@ static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
                 if (type == TOUCH_EVENT_RESERVED)
                         continue;
 
+                /* ignore TOUCH_DOWN events, might have bogus coordinates */
+                if (type == TOUCH_EVENT_DOWN)
+                        continue;
+
                 x = ((buf[0] << 8) | buf[1]) & 0x0fff;
                 y = ((buf[2] << 8) | buf[3]) & 0x0fff;
                 id = (buf[2] >> 4) & 0x0f;