diff options
| author | H Hartley Sweeten <hsweeten@visionengravers.com> | 2015-08-05 10:44:40 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-08-07 15:03:27 -0700 |
| commit | 31bebc030fb2a6e2e7e7ea19ce58a0f196280281 (patch) | |
| tree | 4db67d8e04f17178454593970da26762c55932d3 /drivers/staging/comedi/drivers/me4000.c | |
| parent | 14aa4789f0519d0d97f6bf672a077582b08f2cf6 (diff) | |
staging: comedi: me4000: only set SDF_DIFF when supported
Some of the boards supported by this driver do not have differential analog
inputs. Only set the SDF_DIFF subdev_flag when the board supports it.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/comedi/drivers/me4000.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/me4000.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/staging/comedi/drivers/me4000.c b/drivers/staging/comedi/drivers/me4000.c index 3d45217e9e18..171749b06ef2 100644 --- a/drivers/staging/comedi/drivers/me4000.c +++ b/drivers/staging/comedi/drivers/me4000.c @@ -1284,7 +1284,9 @@ static int me4000_auto_attach(struct comedi_device *dev, /* Analog Input subdevice */ s = &dev->subdevices[0]; s->type = COMEDI_SUBD_AI; - s->subdev_flags = SDF_READABLE | SDF_COMMON | SDF_GROUND | SDF_DIFF; + s->subdev_flags = SDF_READABLE | SDF_COMMON | SDF_GROUND; + if (board->ai_diff_nchan) + s->subdev_flags |= SDF_DIFF; s->n_chan = board->ai_nchan; s->maxdata = 0xffff; s->len_chanlist = ME4000_AI_CHANNEL_LIST_COUNT; |