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    SubjectRE: [PATCHv4 4/5] Input: edt-ft5x06: Ignore touchdown events
    Date
    From: Lothar Waßmann <LW@KARO-electronics.de>
    Data: Wednesday, March 19, 2014 9:09 PM

    >To: Dmitry Torokhov; Duan Fugang-B38611; Grant Likely; Henrik Rydberg; Ian
    >Campbell; Jingoo Han; Kumar Gala; Mark Rutland; Pawel Moll; Rob Herring; Rob
    >Landley; Sachin Kamat; devicetree@vger.kernel.org; linux-doc@vger.kernel.org;
    >linux-input@vger.kernel.org; linux-kernel@vger.kernel.org; Simon Budig; Lothar
    >Waßmann
    >Subject: [PATCHv4 4/5] 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>
    >---
    > drivers/input/touchscreen/edt-ft5x06.c | 4 ++++
    > 1 file changed, 4 insertions(+)
    >
    >diff --git a/drivers/input/touchscreen/edt-ft5x06.c
    >b/drivers/input/touchscreen/edt-ft5x06.c
    >index 27dccfc..af736e4 100644
    >--- a/drivers/input/touchscreen/edt-ft5x06.c
    >+++ b/drivers/input/touchscreen/edt-ft5x06.c
    >@@ -175,6 +175,10 @@ 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;
    >--
    >1.7.10.4
    >
    >

    Acked-by: Fugang Duan <B38611@freescale.com>
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