On Sun, Jun 08, 2014 at 01:53:48AM +0200, Simon Budig wrote: > Hi all. > > I received notice from Robert Wörle who spotted a bug in the ft5x06 > driver (M09 support) which can result in bogus values being written into > the configuration registers. > > Paul wrote: > > I think i found the problem, as the driver sends 3 bytes instead of 2 > > when accessing a register on the M09 firmware. > > Therefore , writing to gain seems to overflow into the offset register. > > > > This seems to be even in the lastet upstream driver so i created a patch > > for this driver which you find attached. > > > > @Simon Budig > > > > Find attached a patch to fix this edt driver bug, feel free to comment , > > test and commit upstream ;-) > > He is right, his fix is correct. Please include his patch into the > repository. > > Acked-By: Simon Budig <simon.budig@xxxxxxxxxxxxxxxxx> Applied, thank you. > > Thanks, > Simon > -- > Simon Budig kernel concepts GmbH > simon.budig@xxxxxxxxxxxxxxxxx Sieghuetter Hauptweg 48 > +49-271-771091-17 D-57072 Siegen > > From 36b9ac0e8206efefc8795c925b0f3b63ab29fd08 Mon Sep 17 00:00:00 2001 > From: Robert Woerle <robert@xxxxxxxxxxxxxxxxxxx> > Date: Wed, 28 May 2014 13:22:09 +0200 > Subject: [PATCH] Input: edt-ft5x06 - fix i2c writes to 2 bytes on M09 > firmware > > Signed-off-by: Robert Woerle <robert@xxxxxxxxxxxxxxxxxxx> > --- > drivers/input/touchscreen/edt-ft5x06.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c > index f8815be..d4f3399 100644 > --- a/drivers/input/touchscreen/edt-ft5x06.c > +++ b/drivers/input/touchscreen/edt-ft5x06.c > @@ -271,7 +271,7 @@ static int edt_ft5x06_register_write(struct edt_ft5x06_ts_data *tsdata, > wrbuf[0] = addr; > wrbuf[1] = value; > > - return edt_ft5x06_ts_readwrite(tsdata->client, 3, > + return edt_ft5x06_ts_readwrite(tsdata->client, 2, > wrbuf, 0, NULL); > > default: > -- > 1.7.9.5 > -- 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
