On Wed, Oct 07, 2015 at 07:21:38AM -0500, fcooper@xxxxxx wrote: > From: Franklin S Cooper Jr <fcooper@xxxxxx> > > Calculate the amount of data that needs to be read for the specified max > number of support points. If the maximum number of support points changes > then the amount that is read from the touch screen controller should > reflect this. > > Signed-off-by: Franklin S Cooper Jr <fcooper@xxxxxx> > --- > drivers/input/touchscreen/edt-ft5x06.c | 6 ++++-- > 1 file changed, 4 insertions(+), 2 deletions(-) > > diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c > index 7239c31..1e0ed6e 100644 > --- a/drivers/input/touchscreen/edt-ft5x06.c > +++ b/drivers/input/touchscreen/edt-ft5x06.c > @@ -178,14 +178,16 @@ static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id) > cmd = 0xf9; /* tell the controller to send touch data */ > offset = 5; /* where the actual touch data starts */ > tplen = 4; /* data comes in so called frames */ > - datalen = 26; /* how much bytes to listen for */ > + > + /* how many bytes to listen for */ > + datalen = tplen * MAX_SUPPORT_POINTS + offset + 1; > break; > > case M09: > cmd = 0x02; > offset = 1; > tplen = 6; > - datalen = 29; > + datalen = tplen * MAX_SUPPORT_POINTS - cmd + 1; > break; Hmm, why would formulae for datalen be different depending on the firmware? And I think original 29 it too low: we need 30 bytes for 5 contacts + 1 to account for offset. I also wonder why we need extra 1 byte in M06 case. Lothar? Thanks. -- Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
