From: H Hartley Sweeten Date: Wed, 5 Aug 2015 17:45:13 +0000 (-0700) Subject: staging: comedi: me4000: clear the ME4000_AI_CTRL_REG in me4000_reset() X-Git-Tag: v5.15~15225^2~199 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a31b50ed1b600ed198252acccf6ec570fabcfc03;p=platform%2Fkernel%2Flinux-starfive.git staging: comedi: me4000: clear the ME4000_AI_CTRL_REG in me4000_reset() Reset the analog input control register after ensuring that any active conversions have been stopped. This mimics what the ai subdevice (*cancel) does. Signed-off-by: H Hartley Sweeten Reviewed-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/comedi/drivers/me4000.c b/drivers/staging/comedi/drivers/me4000.c index b3d871b..3d4a9c8 100644 --- a/drivers/staging/comedi/drivers/me4000.c +++ b/drivers/staging/comedi/drivers/me4000.c @@ -414,6 +414,9 @@ static void me4000_reset(struct comedi_device *dev) outl(ME4000_AI_CTRL_IMMEDIATE_STOP | ME4000_AI_CTRL_STOP, dev->iobase + ME4000_AI_CTRL_REG); + /* Clear the analog input control register */ + outl(0x0, dev->iobase + ME4000_AI_CTRL_REG); + /* Set both stop bits in the analog output control register */ val = ME4000_AO_CTRL_IMMEDIATE_STOP | ME4000_AO_CTRL_STOP; for (chan = 0; chan < 4; chan++)