Commit 1271dd24 authored by H Hartley Sweeten's avatar H Hartley Sweeten Committed by Greg Kroah-Hartman
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staging: comedi: quatech_daqp_cs: use comedi_offset_munge() in ao (*insn_write) 



Use the comedi_offset_munge() helper to do the offset binary to two's
complement conversion when writing a new analog output value.

Signed-off-by: default avatarH Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: default avatarIan Abbott <abbotti@mev.co.uk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent c3f7e153

drivers/staging/comedi/drivers/quatech_daqp_cs.c

+3 −5
Original line number Diff line number Diff line
@@ -655,11 +655,9 @@ static int daqp_ao_insn_write(struct comedi_device *dev, 


		s->readback[chan] = val;



		val &= 0x0fff;

		val ^= 0x0800;		/* Flip the sign */

		val |= (chan << 12);



		outw(val, dev->iobase + DAQP_DA);

		/* write the two's complement value to the channel */

		outw((chan << 12) | comedi_offset_munge(s, val),

		     dev->iobase + DAQP_DA);

	}



	return insn->n;