staging: comedi: ni_stc.h: tidy up NI_M_PLL_CTRL_REG bits

Rename the CamelCase and convert the enum into defines. Use the BIT()
macro to define the bits.

Convert the inline functions MSeries_PLL_Divisor_Bits() and
MSeries_PLL_Multiplier_Bits() to macros. The helper function
ni_mseries_get_pll_parameters() always returns valid values for the
'divisor' and 'multiplier' so the sanity checking can safely be
removed.
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

@@ -4638,10 +4638,8 @@ static int ni_mseries_get_pll_parameters(unsigned reference_period_ns,
 {
 	unsigned div;
 	unsigned best_div = 1;
-	static const unsigned max_div = 0x10;
 	unsigned mult;
 	unsigned best_mult = 1;
-	static const unsigned max_mult = 0x100;
 	static const unsigned pico_per_nano = 1000;
 
 	const unsigned reference_picosec = reference_period_ns * pico_per_nano;
@@ -4651,8 +4649,8 @@ static int ni_mseries_get_pll_parameters(unsigned reference_period_ns,
 	static const unsigned fudge_factor_80_to_20Mhz = 4;
 	int best_period_picosec = 0;
 
-	for (div = 1; div <= max_div; ++div) {
-		for (mult = 1; mult <= max_mult; ++mult) {
+	for (div = 1; div <= NI_M_PLL_MAX_DIVISOR; ++div) {
+		for (mult = 1; mult <= NI_M_PLL_MAX_MULTIPLIER; ++mult) {
 			unsigned new_period_ps =
 			    (reference_picosec * div) / mult;
 			if (abs(new_period_ps - target_picosec) <
@@ -4700,8 +4698,7 @@ static int ni_mseries_set_pll_master_clock(struct comedi_device *dev,
 	devpriv->rtsi_trig_direction_reg &= ~Use_RTSI_Clock_Bit;
 	ni_stc_writew(dev, devpriv->rtsi_trig_direction_reg,
 		      RTSI_Trig_Direction_Register);
-	pll_control_bits =
-	    MSeries_PLL_Enable_Bit | MSeries_PLL_VCO_Mode_75_150MHz_Bits;
+	pll_control_bits = NI_M_PLL_CTRL_ENA | NI_M_PLL_CTRL_VCO_MODE_75_150MHZ;
 	devpriv->clock_and_fout2 |= NI_M_CLK_FOUT2_TIMEBASE1_PLL |
 				    NI_M_CLK_FOUT2_TIMEBASE3_PLL;
 	devpriv->clock_and_fout2 &= ~NI_M_CLK_FOUT2_PLL_SRC_MASK;
@@ -4736,9 +4733,8 @@ static int ni_mseries_set_pll_master_clock(struct comedi_device *dev,
 	}
 
 	ni_writew(dev, devpriv->clock_and_fout2, NI_M_CLK_FOUT2_REG);
-	pll_control_bits |=
-	    MSeries_PLL_Divisor_Bits(freq_divider) |
-	    MSeries_PLL_Multiplier_Bits(freq_multiplier);
+	pll_control_bits |= NI_M_PLL_CTRL_DIVISOR(freq_divider) |
+			    NI_M_PLL_CTRL_MULTIPLIER(freq_multiplier);
 
 	ni_writew(dev, pll_control_bits, NI_M_PLL_CTRL_REG);
 	devpriv->clock_source = source;

drivers/staging/comedi/drivers/ni_stc.h

@@ -980,6 +980,16 @@ static const struct comedi_lrange range_ni_E_ao_ext;
 #define NI_M_CLK_FOUT2_PLL_SRC_STAR	NI_M_CLK_FOUT2_PLL_SRC(0x14)
 #define NI_M_CLK_FOUT2_PLL_SRC_PXI10	NI_M_CLK_FOUT2_PLL_SRC(0x1d)
 #define NI_M_PLL_CTRL_REG		0x1c6
+#define NI_M_PLL_CTRL_VCO_MODE(x)	(((x) & 0x3) << 13)
+#define NI_M_PLL_CTRL_VCO_MODE_200_325MHZ NI_M_PLL_CTRL_VCO_MODE(0)
+#define NI_M_PLL_CTRL_VCO_MODE_175_225MHZ NI_M_PLL_CTRL_VCO_MODE(1)
+#define NI_M_PLL_CTRL_VCO_MODE_100_225MHZ NI_M_PLL_CTRL_VCO_MODE(2)
+#define NI_M_PLL_CTRL_VCO_MODE_75_150MHZ  NI_M_PLL_CTRL_VCO_MODE(3)
+#define NI_M_PLL_CTRL_ENA		BIT(12)
+#define NI_M_PLL_MAX_DIVISOR		0x10
+#define NI_M_PLL_CTRL_DIVISOR(x)	(((x) & 0xf) << 8)
+#define NI_M_PLL_MAX_MULTIPLIER		0x100
+#define NI_M_PLL_CTRL_MULTIPLIER(x)	(((x) & 0xff) << 0)
 #define NI_M_PLL_STATUS_REG		0x1c8
 #define NI_M_PFI_OUT_SEL_REG(x)		(0x1d0 + ((x) * 2))
 #define NI_M_PFI_DI_REG			0x1dc
@@ -997,34 +1007,6 @@ static const struct comedi_lrange range_ni_E_ao_ext;
 #define NI_M_STATIC_AI_CTRL_REG(x)	((x) ? (0x260 + (x)) : 0x064)
 #define NI_M_AO_REF_ATTENUATION_REG(x)	(0x264 + (x))
 
-enum MSeries_PLL_Control_Bits {
-	MSeries_PLL_Enable_Bit = 0x1000,
-	MSeries_PLL_VCO_Mode_200_325MHz_Bits = 0x0,
-	MSeries_PLL_VCO_Mode_175_225MHz_Bits = 0x2000,
-	MSeries_PLL_VCO_Mode_100_225MHz_Bits = 0x4000,
-	MSeries_PLL_VCO_Mode_75_150MHz_Bits = 0x6000,
-};
-static inline unsigned MSeries_PLL_Divisor_Bits(unsigned divisor)
-{
-	static const unsigned max_divisor = 0x10;
-	if (divisor < 1 || divisor > max_divisor) {
-		pr_err("%s: bug, invalid divisor=%i\n", __func__, divisor);
-		return 0;
-	}
-	return (divisor & 0xf) << 8;
-}
-
-static inline unsigned MSeries_PLL_Multiplier_Bits(unsigned multiplier)
-{
-	static const unsigned max_multiplier = 0x100;
-	if (multiplier < 1 || multiplier > max_multiplier) {
-		pr_err("%s: bug, invalid multiplier=%i\n", __func__,
-		       multiplier);
-		return 0;
-	}
-	return multiplier & 0xff;
-}
-
 enum MSeries_PLL_Status {
 	MSeries_PLL_Locked_Bit = 0x1
 };