diff options
| author | H Hartley Sweeten <hsweeten@visionengravers.com> | 2013-03-22 09:43:45 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-25 11:41:51 -0700 |
| commit | 9bffb75d7510c44ce227d940cd8663df911bc487 (patch) | |
| tree | fb400f14d4955e1ff08f06c65cf70a058e02e34f | |
| parent | 28a10930e6af5585ade2ef23eb8ce370d1450488 (diff) | |
| download | blackbird-op-linux-9bffb75d7510c44ce227d940cd8663df911bc487.tar.gz blackbird-op-linux-9bffb75d7510c44ce227d940cd8663df911bc487.zip | |
staging: comedi: ni_labpc: fix command support with analog input subdevice
An interrupt is required for command support to work with the
analog input subdevice. When used with the ISA driver, enabling
the interrupt is optional. Fix the subdevice init so that command
support is only enabled if the irq is available.
Add some whitespace to the subdevice init. Change the 'maxdata'
value to hex as this is more common in comedi drivers.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/staging/comedi/drivers/ni_labpc.c | 26 |
1 files changed, 14 insertions, 12 deletions
diff --git a/drivers/staging/comedi/drivers/ni_labpc.c b/drivers/staging/comedi/drivers/ni_labpc.c index b6bfb2b626a8..ef9a206068fd 100644 --- a/drivers/staging/comedi/drivers/ni_labpc.c +++ b/drivers/staging/comedi/drivers/ni_labpc.c @@ -1758,18 +1758,20 @@ int labpc_common_attach(struct comedi_device *dev, unsigned long iobase, /* analog input subdevice */ s = &dev->subdevices[0]; - dev->read_subdev = s; - s->type = COMEDI_SUBD_AI; - s->subdev_flags = - SDF_READABLE | SDF_GROUND | SDF_COMMON | SDF_DIFF | SDF_CMD_READ; - s->n_chan = 8; - s->len_chanlist = 8; - s->maxdata = (1 << 12) - 1; /* 12 bit resolution */ - s->range_table = board->ai_range_table; - s->do_cmd = labpc_ai_cmd; - s->do_cmdtest = labpc_ai_cmdtest; - s->insn_read = labpc_ai_insn_read; - s->cancel = labpc_cancel; + s->type = COMEDI_SUBD_AI; + s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_COMMON | SDF_DIFF; + s->n_chan = 8; + s->len_chanlist = 8; + s->maxdata = 0x0fff; + s->range_table = board->ai_range_table; + s->insn_read = labpc_ai_insn_read; + if (dev->irq) { + dev->read_subdev = s; + s->subdev_flags |= SDF_CMD_READ; + s->do_cmd = labpc_ai_cmd; + s->do_cmdtest = labpc_ai_cmdtest; + s->cancel = labpc_cancel; + } /* analog output */ s = &dev->subdevices[1]; |
