staging: comedi: ni_660x: tidy up the misc. constants

Remove enum ni_660x_constants and just #define the value.

Move all the constant #defines so they are in one place and rename
them so they are more conesistent.
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_660x.c

@@ -41,14 +41,6 @@
 #include "mite.h"
 #include "ni_tio.h"
 
-enum ni_660x_constants {
-	counters_per_chip = 4
-};
-
-#define NUM_PFI_CHANNELS 40
-/* there are only up to 3 dma channels, but the register layout allows for 4 */
-#define MAX_DMA_CHANNEL 4
-
 /* See Register-Level Programmer Manual page 3.1 */
 enum ni_660x_register {
 	NI660X_G0_INT_ACK,
@@ -390,22 +382,29 @@ static const struct ni_660x_board ni_660x_boards[] = {
 	},
 };
 
-#define NI_660X_MAX_NUM_CHIPS 2
-#define NI_660X_MAX_NUM_COUNTERS (NI_660X_MAX_NUM_CHIPS * counters_per_chip)
+#define NI660X_NUM_PFI_CHANNELS		40
+
+/* there are only up to 3 dma channels, but the register layout allows for 4 */
+#define NI660X_MAX_DMA_CHANNEL		4
+
+#define NI660X_COUNTERS_PER_CHIP	4
+#define NI660X_MAX_CHIPS		2
+#define NI660X_MAX_COUNTERS		(NI660X_MAX_CHIPS *	\
+					 NI660X_COUNTERS_PER_CHIP)
 
 struct ni_660x_private {
 	struct mite_struct *mite;
 	struct ni_gpct_device *counter_dev;
 	struct mite_dma_descriptor_ring
-	*mite_rings[NI_660X_MAX_NUM_CHIPS][counters_per_chip];
+	*mite_rings[NI660X_MAX_CHIPS][NI660X_COUNTERS_PER_CHIP];
 	/* protects mite channel request/release */
 	spinlock_t mite_channel_lock;
 	/* prevents races between interrupt and comedi_poll */
 	spinlock_t interrupt_lock;
 	/* protects dma_cfg changes */
 	spinlock_t dma_cfg_lock;
-	unsigned int dma_cfg[NI_660X_MAX_NUM_CHIPS];
-	unsigned int io_cfg[NUM_PFI_CHANNELS];
+	unsigned int dma_cfg[NI660X_MAX_CHIPS];
+	unsigned int io_cfg[NI660X_NUM_PFI_CHANNELS];
 	u64 io_dir;
 };
 
@@ -667,7 +666,7 @@ static int ni_660x_allocate_private(struct comedi_device *dev)
 	spin_lock_init(&devpriv->mite_channel_lock);
 	spin_lock_init(&devpriv->interrupt_lock);
 	spin_lock_init(&devpriv->dma_cfg_lock);
-	for (i = 0; i < NUM_PFI_CHANNELS; ++i)
+	for (i = 0; i < NI660X_NUM_PFI_CHANNELS; ++i)
 		devpriv->io_cfg[i] = NI_660X_PFI_OUTPUT_COUNTER;
 
 	return 0;
@@ -681,7 +680,7 @@ static int ni_660x_alloc_mite_rings(struct comedi_device *dev)
 	unsigned int j;
 
 	for (i = 0; i < board->n_chips; ++i) {
-		for (j = 0; j < counters_per_chip; ++j) {
+		for (j = 0; j < NI660X_COUNTERS_PER_CHIP; ++j) {
 			devpriv->mite_rings[i][j] =
 			    mite_alloc_ring(devpriv->mite);
 			if (!devpriv->mite_rings[i][j])
@@ -699,7 +698,7 @@ static void ni_660x_free_mite_rings(struct comedi_device *dev)
 	unsigned int j;
 
 	for (i = 0; i < board->n_chips; ++i) {
-		for (j = 0; j < counters_per_chip; ++j)
+		for (j = 0; j < NI660X_COUNTERS_PER_CHIP; ++j)
 			mite_free_ring(devpriv->mite_rings[i][j]);
 	}
 }
@@ -711,10 +710,10 @@ static void init_tio_chip(struct comedi_device *dev, int chipset)
 
 	/*  init dma configuration register */
 	devpriv->dma_cfg[chipset] = 0;
-	for (i = 0; i < MAX_DMA_CHANNEL; ++i)
+	for (i = 0; i < NI660X_MAX_DMA_CHANNEL; ++i)
 		devpriv->dma_cfg[chipset] |= NI660X_DMA_CFG_SEL_NONE(i);
 	ni_660x_write(dev, chipset, devpriv->dma_cfg[chipset], NI660X_DMA_CFG);
-	for (i = 0; i < NUM_PFI_CHANNELS; ++i)
+	for (i = 0; i < NI660X_NUM_PFI_CHANNELS; ++i)
 		ni_660x_write(dev, chipset, 0, NI660X_IO_CFG(i));
 }
 
@@ -899,7 +898,7 @@ static int ni_660x_auto_attach(struct comedi_device *dev,
 	if (ret < 0)
 		return ret;
 
-	ret = comedi_alloc_subdevices(dev, 2 + NI_660X_MAX_NUM_COUNTERS);
+	ret = comedi_alloc_subdevices(dev, 2 + NI660X_MAX_COUNTERS);
 	if (ret)
 		return ret;
 
@@ -965,7 +964,7 @@ static int ni_660x_auto_attach(struct comedi_device *dev,
 	s = &dev->subdevices[subdev++];
 	s->type		= COMEDI_SUBD_DIO;
 	s->subdev_flags	= SDF_READABLE | SDF_WRITABLE;
-	s->n_chan	= NUM_PFI_CHANNELS;
+	s->n_chan	= NI660X_NUM_PFI_CHANNELS;
 	s->maxdata	= 1;
 	s->range_table	= &range_digital;
 	s->insn_bits	= ni_660x_dio_insn_bits;
@@ -977,7 +976,7 @@ static int ni_660x_auto_attach(struct comedi_device *dev,
 	 */
 	ni_660x_write(dev, 0, 0, NI660X_STC_DIO_CONTROL);
 
-	n_counters = board->n_chips * counters_per_chip;
+	n_counters = board->n_chips * NI660X_COUNTERS_PER_CHIP;
 	devpriv->counter_dev = ni_gpct_device_construct(dev,
 						     ni_660x_gpct_write,
 						     ni_660x_gpct_read,
@@ -985,7 +984,7 @@ static int ni_660x_auto_attach(struct comedi_device *dev,
 						     n_counters);
 	if (!devpriv->counter_dev)
 		return -ENOMEM;
-	for (i = 0; i < NI_660X_MAX_NUM_COUNTERS; ++i) {
+	for (i = 0; i < NI660X_MAX_COUNTERS; ++i) {
 		s = &dev->subdevices[subdev++];
 		if (i < n_counters) {
 			s->type = COMEDI_SUBD_COUNTER;
@@ -1006,9 +1005,9 @@ static int ni_660x_auto_attach(struct comedi_device *dev,
 			s->private = &devpriv->counter_dev->counters[i];
 
 			devpriv->counter_dev->counters[i].chip_index =
-			    i / counters_per_chip;
+			    i / NI660X_COUNTERS_PER_CHIP;
 			devpriv->counter_dev->counters[i].counter_index =
-			    i % counters_per_chip;
+			    i % NI660X_COUNTERS_PER_CHIP;
 		} else {
 			s->type = COMEDI_SUBD_UNUSED;
 		}
@@ -1024,7 +1023,7 @@ static int ni_660x_auto_attach(struct comedi_device *dev,
 	  *   chan 0-7:  DIO inputs
 	  *   chan 8-39: counter signal inputs
 	  */
-	for (i = 0; i < NUM_PFI_CHANNELS; ++i) {
+	for (i = 0; i < NI660X_NUM_PFI_CHANNELS; ++i) {
 		if (i < 8)
 			ni_660x_set_pfi_routing(dev, i, NI_660X_PFI_OUTPUT_DIO);
 		else