staging: comedi: amplc_pc263: Change DIO subdevice to DO

This is a relay output card with no inputs.  It's single subdevice is
currently a digital input/output subdevice (COMEDI_SUBD_DIO).  It should
really be a digital output subdevice (COMEDI_SUBD_DO).  Change the
subdevice type and remove the insn_config() hook as it doesn't do
anything useful.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/amplc_pc263.c

@@ -154,10 +154,7 @@ static struct comedi_driver driver_amplc_pc263 = {
 static int pc263_request_region(unsigned minor, unsigned long from,
 				unsigned long extent);
 #endif
-static int pc263_dio_insn_bits(struct comedi_device *dev,
-			       struct comedi_subdevice *s,
-			       struct comedi_insn *insn, unsigned int *data);
-static int pc263_dio_insn_config(struct comedi_device *dev,
+static int pc263_do_insn_bits(struct comedi_device *dev,
 			      struct comedi_subdevice *s,
 			      struct comedi_insn *insn, unsigned int *data);
 
@@ -319,16 +316,13 @@ static int pc263_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 	}
 
 	s = dev->subdevices + 0;
-	/* digital i/o subdevice */
-	s->type = COMEDI_SUBD_DIO;
+	/* digital output subdevice */
+	s->type = COMEDI_SUBD_DO;
 	s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
 	s->n_chan = 16;
 	s->maxdata = 1;
 	s->range_table = &range_digital;
-	s->insn_bits = pc263_dio_insn_bits;
-	s->insn_config = pc263_dio_insn_config;
-	/* all outputs */
-	s->io_bits = 0xffff;
+	s->insn_bits = pc263_do_insn_bits;
 	/* read initial relay state */
 	s->state = inb(dev->iobase) | (inb(dev->iobase + 1) << 8);
 
@@ -391,12 +385,7 @@ static int pc263_request_region(unsigned minor, unsigned long from,
 }
 #endif
 
-/* DIO devices are slightly special.  Although it is possible to
- * implement the insn_read/insn_write interface, it is much more
- * useful to applications if you implement the insn_bits interface.
- * This allows packed reading/writing of the DIO channels.  The
- * comedi core can convert between insn_bits and insn_read/write */
-static int pc263_dio_insn_bits(struct comedi_device *dev,
+static int pc263_do_insn_bits(struct comedi_device *dev,
 			      struct comedi_subdevice *s,
 			      struct comedi_insn *insn, unsigned int *data)
 {
@@ -422,15 +411,6 @@ static int pc263_dio_insn_bits(struct comedi_device *dev,
 	return 2;
 }
 
-static int pc263_dio_insn_config(struct comedi_device *dev,
-				 struct comedi_subdevice *s,
-				 struct comedi_insn *insn, unsigned int *data)
-{
-	if (insn->n != 1)
-		return -EINVAL;
-	return 1;
-}
-
 /*
  * A convenient macro that defines init_module() and cleanup_module(),
  * as necessary.