staging: comedi: ni_mio_common: absorb helpers into ni_freq_out_insn_config()

Absorb the helper functions that handle the INSN_CONFIG_SET_CLOCK_SRC and
INSN_CONFIG_GET_CLOCK_SRC comedi instructions.
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>

drivers/staging/comedi/drivers/ni_mio_common.c

@@ -3903,12 +3903,16 @@ static int ni_freq_out_insn_write(struct comedi_device *dev,
 	return insn->n;
 }
 
-static int ni_set_freq_out_clock(struct comedi_device *dev,
-				 unsigned int clock_source)
+static int ni_freq_out_insn_config(struct comedi_device *dev,
+				   struct comedi_subdevice *s,
+				   struct comedi_insn *insn,
+				   unsigned int *data)
 {
 	struct ni_private *devpriv = dev->private;
 
-	switch (clock_source) {
+	switch (data[0]) {
+	case INSN_CONFIG_SET_CLOCK_SRC:
+		switch (data[1]) {
 		case NI_FREQ_OUT_TIMEBASE_1_DIV_2_CLOCK_SRC:
 			devpriv->clock_and_fout &= ~FOUT_Timebase_Select;
 			break;
@@ -3920,39 +3924,20 @@ static int ni_set_freq_out_clock(struct comedi_device *dev,
 		}
 		devpriv->stc_writew(dev, devpriv->clock_and_fout,
 				    Clock_and_FOUT_Register);
-	return 3;
-}
-
-static void ni_get_freq_out_clock(struct comedi_device *dev,
-				  unsigned int *clock_source,
-				  unsigned int *clock_period_ns)
-{
-	struct ni_private *devpriv = dev->private;
-
+		break;
+	case INSN_CONFIG_GET_CLOCK_SRC:
 		if (devpriv->clock_and_fout & FOUT_Timebase_Select) {
-		*clock_source = NI_FREQ_OUT_TIMEBASE_2_CLOCK_SRC;
-		*clock_period_ns = TIMEBASE_2_NS;
+			data[1] = NI_FREQ_OUT_TIMEBASE_2_CLOCK_SRC;
+			data[2] = TIMEBASE_2_NS;
 		} else {
-		*clock_source = NI_FREQ_OUT_TIMEBASE_1_DIV_2_CLOCK_SRC;
-		*clock_period_ns = TIMEBASE_1_NS * 2;
+			data[1] = NI_FREQ_OUT_TIMEBASE_1_DIV_2_CLOCK_SRC;
+			data[2] = TIMEBASE_1_NS * 2;
 		}
-}
-
-static int ni_freq_out_insn_config(struct comedi_device *dev,
-				   struct comedi_subdevice *s,
-				   struct comedi_insn *insn, unsigned int *data)
-{
-	switch (data[0]) {
-	case INSN_CONFIG_SET_CLOCK_SRC:
-		return ni_set_freq_out_clock(dev, data[1]);
 		break;
-	case INSN_CONFIG_GET_CLOCK_SRC:
-		ni_get_freq_out_clock(dev, &data[1], &data[2]);
-		return 3;
 	default:
-		break;
-	}
 		return -EINVAL;
+	}
+	return insn->n;
 }
 
 static int ni_8255_callback(int dir, int port, int data, unsigned long arg)