staging: comedi: ni_stc.h: tidy up AO_Trigger_Select_Register and bits

Rename the CamelCase. Use the BIT() macro to define the bits.

Tidy up the ni_ao_cmd() by using a local var to mask/set the bits then
programming the register in the common code path.

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

@@ -361,7 +361,7 @@ static const struct mio_regmap m_series_stc_write_regmap[] = {
 	[NISTC_AI_TRIG_SEL_REG]		= { 0x17e, 2 },
 	[NISTC_AI_DIV_LOADA_REG]	= { 0x180, 4 },
 	[NISTC_AO_START_SEL_REG]	= { 0x184, 2 },
-	[AO_Trigger_Select_Register]	= { 0x186, 2 },
+	[NISTC_AO_TRIG_SEL_REG]		= { 0x186, 2 },
 	[G_Autoincrement_Register(0)]	= { 0x188, 2 },
 	[G_Autoincrement_Register(1)]	= { 0x18a, 2 },
 	[AO_Mode_3_Register]		= { 0x18c, 2 },
@@ -2902,6 +2902,7 @@ static int ni_ao_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
 	int bits;
 	int i;
 	unsigned trigvar;
+	unsigned val;
 
 	if (dev->irq == 0) {
 		dev_err(dev->class_dev, "cannot run command without an irq\n");
@@ -2936,29 +2937,36 @@ static int ni_ao_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
 		devpriv->ao_mode1 |= NISTC_AO_MODE1_TRIGGER_ONCE;
 	}
 	ni_stc_writew(dev, devpriv->ao_mode1, NISTC_AO_MODE1_REG);
+
+	val = devpriv->ao_trigger_select;
 	switch (cmd->start_src) {
 	case TRIG_INT:
 	case TRIG_NOW:
-		devpriv->ao_trigger_select &=
-		    ~(AO_START1_Polarity | AO_START1_Select(-1));
-		devpriv->ao_trigger_select |= AO_START1_Edge | AO_START1_Sync;
-		ni_stc_writew(dev, devpriv->ao_trigger_select,
-			      AO_Trigger_Select_Register);
+		val &= ~(NISTC_AO_TRIG_START1_POLARITY |
+			 NISTC_AO_TRIG_START1_SEL_MASK);
+		val |= NISTC_AO_TRIG_START1_EDGE |
+		       NISTC_AO_TRIG_START1_SYNC;
 		break;
 	case TRIG_EXT:
-		devpriv->ao_trigger_select =
-		    AO_START1_Select(CR_CHAN(cmd->start_arg) + 1);
-		if (cmd->start_arg & CR_INVERT)
-			devpriv->ao_trigger_select |= AO_START1_Polarity;	/*  0=active high, 1=active low. see daq-stc 3-24 (p186) */
-		if (cmd->start_arg & CR_EDGE)
-			devpriv->ao_trigger_select |= AO_START1_Edge;	/*  0=edge detection disabled, 1=enabled */
+		val = NISTC_AO_TRIG_START1_SEL(CR_CHAN(cmd->start_arg) + 1);
+		if (cmd->start_arg & CR_INVERT) {
+			/* 0=active high, 1=active low. see daq-stc 3-24 (p186) */
+			val |= NISTC_AO_TRIG_START1_POLARITY;
+		}
+		if (cmd->start_arg & CR_EDGE) {
+			/* 0=edge detection disabled, 1=enabled */
+			val |= NISTC_AO_TRIG_START1_EDGE;
+		}
 		ni_stc_writew(dev, devpriv->ao_trigger_select,
-			      AO_Trigger_Select_Register);
+			      NISTC_AO_TRIG_SEL_REG);
 		break;
 	default:
 		BUG();
 		break;
 	}
+	devpriv->ao_trigger_select = val;
+	ni_stc_writew(dev, devpriv->ao_trigger_select, NISTC_AO_TRIG_SEL_REG);
+
 	devpriv->ao_mode3 &= ~AO_Trigger_Length;
 	ni_stc_writew(dev, devpriv->ao_mode3, AO_Mode_3_Register);
 
@@ -3211,7 +3219,7 @@ static int ni_ao_reset(struct comedi_device *dev, struct comedi_subdevice *s)
 	ni_stc_writew(dev, devpriv->ao_mode3, AO_Mode_3_Register);
 	devpriv->ao_trigger_select = 0;
 	ni_stc_writew(dev, devpriv->ao_trigger_select,
-		      AO_Trigger_Select_Register);
+		      NISTC_AO_TRIG_SEL_REG);
 	if (devpriv->is_6xxx) {
 		unsigned immediate_bits = 0;
 		unsigned i;

drivers/staging/comedi/drivers/ni_stc.h

@@ -348,6 +348,17 @@
 #define NISTC_AO_START_EDGE		BIT(5)
 #define NISTC_AO_START_SEL(x)		(((x) & 0x1f) << 0)
 
+#define NISTC_AO_TRIG_SEL_REG		67
+#define NISTC_AO_TRIG_UI2_EXT_GATE_ENA	BIT(15)
+#define NISTC_AO_TRIG_DELAYED_START1	BIT(14)
+#define NISTC_AO_TRIG_START1_POLARITY	BIT(13)
+#define NISTC_AO_TRIG_UI2_SRC_POLARITY	BIT(12)
+#define NISTC_AO_TRIG_UI2_SRC_SEL(x)	(((x) & 0x1f) << 7)
+#define NISTC_AO_TRIG_START1_SYNC	BIT(6)
+#define NISTC_AO_TRIG_START1_EDGE	BIT(5)
+#define NISTC_AO_TRIG_START1_SEL(x)	(((x) & 0x1f) << 0)
+#define NISTC_AO_TRIG_START1_SEL_MASK	NISTC_AO_TRIG_START1_SEL(0x1f)
+
 #define AI_Status_1_Register		2
 #define Interrupt_A_St				0x8000
 #define AI_FIFO_Full_St				0x4000
@@ -406,16 +417,6 @@ enum Joint_Status_2_Bits {
 #define AO_BC_Save_Registers		18
 #define AO_UC_Save_Registers		20
 
-#define AO_Trigger_Select_Register	67
-#define AO_UI2_External_Gate_Enable		_bit15
-#define AO_Delayed_START1			_bit14
-#define AO_START1_Polarity			_bit13
-#define AO_UI2_Source_Polarity			_bit12
-#define AO_UI2_Source_Select(x)			(((x)&0x1f)<<7)
-#define AO_START1_Sync				_bit6
-#define AO_START1_Edge				_bit5
-#define AO_START1_Select(x)			(((x)&0x1f)<<0)
-
 #define AO_Mode_3_Register		70
 #define AO_UI2_Switch_Load_Next_TC		_bit13
 #define AO_UC_Switch_Load_Every_BC_TC		_bit12