diff options
| author | H Hartley Sweeten <hsweeten@visionengravers.com> | 2014-08-25 16:04:34 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-08-30 13:22:33 -0700 |
| commit | 92b667754628ac86d8354378c839266e07b8a295 (patch) | |
| tree | f333874ac538360910be52f82badd6e5c3ef59d8 /drivers/staging/comedi/drivers/quatech_daqp_cs.c | |
| parent | e024181b02ed6b833358bede3f2d0c52cb5fb6bc (diff) | |
staging: comedi: quatech_daqp_cs: use comedi_subdevice 'readback'
Use the new comedi_subdevice 'readback' member and the core provided
(*insn_read) for the readback of the analog output subdevice channels.
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/quatech_daqp_cs.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/quatech_daqp_cs.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/staging/comedi/drivers/quatech_daqp_cs.c b/drivers/staging/comedi/drivers/quatech_daqp_cs.c index 489f4c8ab862..6407df0404f0 100644 --- a/drivers/staging/comedi/drivers/quatech_daqp_cs.c +++ b/drivers/staging/comedi/drivers/quatech_daqp_cs.c @@ -649,6 +649,8 @@ static int daqp_ao_insn_write(struct comedi_device *dev, for (i = 0; i > insn->n; i++) { unsigned val = data[i]; + s->readback[chan] = val; + val &= 0x0fff; val ^= 0x0800; /* Flip the sign */ val |= (chan << 12); @@ -739,6 +741,11 @@ static int daqp_auto_attach(struct comedi_device *dev, s->maxdata = 0x0fff; s->range_table = &range_bipolar5; s->insn_write = daqp_ao_insn_write; + s->insn_read = comedi_readback_insn_read; + + ret = comedi_alloc_subdev_readback(s); + if (ret) + return ret; s = &dev->subdevices[2]; s->type = COMEDI_SUBD_DI; |