staging: comedi: ni_stc.h: tidy up G0_G1_Select register and bits

Rename the CamelCase. Convert the inline helper functions into macros.

Tidy up the driver code to use the new macros. For consistency, make
the ni_set_gpct_dma_channel() helper follow the same style as the
ni_set_ai_dma_channel() and ni_set_ao_dma_channel() helpers.

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

@@ -551,7 +551,7 @@ static inline void ni_set_bitfield(struct comedi_device *dev, int reg,
 		devpriv->ai_ao_select_reg |= bit_values & bit_mask;
 		ni_writeb(dev, devpriv->ai_ao_select_reg, reg);
 		break;
-	case G0_G1_Select:
+	case NI_E_DMA_G0_G1_SEL_REG:
 		devpriv->g0_g1_select_reg &= ~bit_mask;
 		devpriv->g0_g1_select_reg |= bit_values & bit_mask;
 		ni_writeb(dev, devpriv->g0_g1_select_reg, reg);
@@ -592,19 +592,19 @@ static inline void ni_set_ao_dma_channel(struct comedi_device *dev, int channel)
 			NI_E_DMA_AO_SEL_MASK, NI_E_DMA_AO_SEL(bits));
 }
 
-/* negative mite_channel means no channel */
+/* negative channel means no channel */
 static inline void ni_set_gpct_dma_channel(struct comedi_device *dev,
 					   unsigned gpct_index,
-					   int mite_channel)
+					   int channel)
 {
-	unsigned bitfield;
+	unsigned bits = 0;
 
-	if (mite_channel >= 0)
-		bitfield = GPCT_DMA_Select_Bits(gpct_index, mite_channel);
-	else
-		bitfield = 0;
-	ni_set_bitfield(dev, G0_G1_Select, GPCT_DMA_Select_Mask(gpct_index),
-			bitfield);
+	if (channel >= 0)
+		bits = ni_stc_dma_channel_select_bitfield(channel);
+
+	ni_set_bitfield(dev, NI_E_DMA_G0_G1_SEL_REG,
+			NI_E_DMA_G0_G1_SEL_MASK(gpct_index),
+			NI_E_DMA_G0_G1_SEL(gpct_index, bits));
 }
 
 /* negative mite_channel means no channel */
@@ -5370,7 +5370,7 @@ static int ni_E_init(struct comedi_device *dev,
 
 	/* DMA setup */
 	ni_writeb(dev, devpriv->ai_ao_select_reg, NI_E_DMA_AI_AO_SEL_REG);
-	ni_writeb(dev, devpriv->g0_g1_select_reg, G0_G1_Select);
+	ni_writeb(dev, devpriv->g0_g1_select_reg, NI_E_DMA_G0_G1_SEL_REG);
 
 	if (devpriv->is_6xxx) {
 		ni_writeb(dev, 0, Magic_611x);

drivers/staging/comedi/drivers/ni_stc.h

@@ -577,6 +577,10 @@
 #define NI_E_DMA_AO_SEL(x)		(((x) & 0xf) << 4)
 #define NI_E_DMA_AO_SEL_MASK		NI_E_DMA_AO_SEL(0xf)
 
+#define NI_E_DMA_G0_G1_SEL_REG		0x0b	/* w8 */
+#define NI_E_DMA_G0_G1_SEL(_g, _c)	(((_c) & 0xf) << ((_g) * 4))
+#define NI_E_DMA_G0_G1_SEL_MASK(_g)	NI_E_DMA_G0_G1_SEL((_g), 0xf)
+
 #define NI_E_SERIAL_CMD_REG		0x0d	/* w8 */
 #define NI_E_SERIAL_CMD_DAC_LD(x)	BIT(3 + (x))
 #define NI_E_SERIAL_CMD_EEPROM_CS	BIT(2)
@@ -588,7 +592,6 @@
 #define NI_E_MISC_CMD_EXT_ATRIG		NI_E_MISC_CMD_INTEXT_ATRIG(0)
 #define NI_E_MISC_CMD_INT_ATRIG		NI_E_MISC_CMD_INTEXT_ATRIG(1)
 
-#define G0_G1_Select			0x0b
 static inline unsigned ni_stc_dma_channel_select_bitfield(unsigned channel)
 {
 	if (channel < 4)
@@ -601,18 +604,6 @@ static inline unsigned ni_stc_dma_channel_select_bitfield(unsigned channel)
 	return 0;
 }
 
-static inline unsigned GPCT_DMA_Select_Bits(unsigned gpct_index,
-					    unsigned mite_channel)
-{
-	return ni_stc_dma_channel_select_bitfield(mite_channel) << (4 *
-								    gpct_index);
-}
-
-static inline unsigned GPCT_DMA_Select_Mask(unsigned gpct_index)
-{
-	return 0xf << (4 * gpct_index);
-}
-
 #define NI_E_AI_CFG_LO_REG		0x10	/* w16 */
 #define NI_E_AI_CFG_LO_LAST_CHAN	BIT(15)
 #define NI_E_AI_CFG_LO_GEN_TRIG		BIT(12)