On Thursday, October 08, 2015 3:38 AM, Ian Abbott wrote:
> On 08/10/15 02:26, H Hartley Sweeten wrote:
>> According to the boardinfo, the dt3002 board does not have analog outputs.
>> The rest of the board have two 12-bit analog output channels.
>>
>> Replace the 'dachan' and 'dabits' members of the boardinfo with a bit-
>> field flag 'has_ao'. Use the new member to conditionally initialize
>> the analog output subdevice.
>>
>> Signed-off-by: H Hartley Sweeten <hswee...@visionengravers.com>
>> Cc: Ian Abbott <abbo...@mev.co.uk>
>> Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
>> ---
>> drivers/staging/comedi/drivers/dt3000.c | 40
>> +++++++++++++++------------------
>> 1 file changed, 18 insertions(+), 22 deletions(-)
>>
>> diff --git a/drivers/staging/comedi/drivers/dt3000.c
>> b/drivers/staging/comedi/drivers/dt3000.c
>> index 8d6d344..12cf65a 100644
>> --- a/drivers/staging/comedi/drivers/dt3000.c
>> +++ b/drivers/staging/comedi/drivers/dt3000.c
> [snip]
>> @@ -681,15 +674,18 @@ static int dt3000_auto_attach(struct comedi_device
>> *dev,
>> s->cancel = dt3k_ai_cancel;
>> }
>>
>> + /* Analog Output subdevice */
>> s = &dev->subdevices[1];
>> - /* ao subsystem */
>> - s->type = COMEDI_SUBD_AO;
>> - s->subdev_flags = SDF_WRITABLE;
>> - s->n_chan = 2;
>> - s->maxdata = (1 << board->dabits) - 1;
>> - s->len_chanlist = 1;
>> - s->range_table = &range_bipolar10;
>> - s->insn_write = dt3k_ao_insn_write;
>> + if (board->has_ao) {
>> + s->type = COMEDI_SUBD_AO;
>> + s->subdev_flags = SDF_WRITABLE;
>> + s->n_chan = 2;
>> + s->maxdata = 0x0fff;
>> + s->range_table = &range_bipolar10;
>> + s->insn_write = dt3k_ao_insn_write;
>> + } else {
>> + s->type = COMEDI_SUBD_UNUSED;
>> + }
>>
>> ret = comedi_alloc_subdev_readback(s);
>> if (ret)
>>
>
> The comedi_alloc_subdev_readback() needs moving into the `if
> (board->has_ao)` block.
Ugh.. overlooked that. I'll post an updated series shortly.
Thanks,
Hartley
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