[PATCH] staging: pi433: remove some macros, introduce some inline functions

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From: Marcus Wolf <linux@xxxxxxxxxxxxxxxxxxxxx>

According to the proposal of Walter Harms, I removed some macros
and added some inline functions.

Since I used a bit more intelligent interface, this enhances
readability and reduces problems with checkpatch.pl at the same time.

In addition obsolete debug ifdefs were removed.

Signed-off-by: Marcus Wolf <linux@xxxxxxxxxxxxxxxxxxxxx>
---
 drivers/staging/pi433/rf69.c |  544 ++++++++++++++++++------------------------
 1 file changed, 238 insertions(+), 306 deletions(-)

diff --git a/drivers/staging/pi433/rf69.c b/drivers/staging/pi433/rf69.c
index ed737f4b1e77..ec9811ae4735 100644
--- a/drivers/staging/pi433/rf69.c
+++ b/drivers/staging/pi433/rf69.c
@@ -28,33 +28,57 @@
 #include "rf69.h"
 #include "rf69_registers.h"

-#define F_OSC	  32000000 /* in Hz */
-#define FIFO_SIZE 66 	   /* in byte */
+#define F_OSC 32000000 /* in Hz */
+#define FIFO_SIZE 66   /* in byte */

 /*-------------------------------------------------------------------------*/

-#define READ_REG(x)	rf69_read_reg (spi, x)
-#define WRITE_REG(x,y)	rf69_write_reg(spi, x, y)
 #define INVALID_PARAM \
 	{ \
 		dev_dbg(&spi->dev, "set: illegal input param"); \
 		return -EINVAL; \
 	}

+inline static int setBit(struct spi_device *spi, u8 reg, u8 mask)
+{
+	u8 tempVal;
+
+	tempVal = rf69_read_reg (spi, reg);
+	tempVal = tempVal | mask;
+	return rf69_write_reg(spi, reg, tempVal);
+}
+
+inline static int rstBit(struct spi_device *spi, u8 reg, u8 mask)
+{
+	u8 tempVal;
+
+	tempVal = rf69_read_reg (spi, reg);
+	tempVal = tempVal & ~mask;
+	return rf69_write_reg(spi, reg, tempVal);
+}
+
+inline static int rmw(struct spi_device *spi, u8 reg, u8 mask, u8 value)
+{
+	u8 tempVal;
+
+	tempVal = rf69_read_reg (spi, reg);
+	tempVal = (tempVal & ~mask) | value;
+	return rf69_write_reg(spi, reg, tempVal);
+}
+
 /*-------------------------------------------------------------------------*/

 int rf69_set_mode(struct spi_device *spi, enum mode mode)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: mode");
-	#endif

+	dev_dbg(&spi->dev, "set: mode");
+
 	switch (mode){
-	case transmit:	  return WRITE_REG(REG_OPMODE, (READ_REG(REG_OPMODE) & ~MASK_OPMODE_MODE) | OPMODE_MODE_TRANSMIT);
-	case receive:	  return WRITE_REG(REG_OPMODE, (READ_REG(REG_OPMODE) & ~MASK_OPMODE_MODE) | OPMODE_MODE_RECEIVE);
-	case synthesizer: return WRITE_REG(REG_OPMODE, (READ_REG(REG_OPMODE) & ~MASK_OPMODE_MODE) | OPMODE_MODE_SYNTHESIZER);
-	case standby:	  return WRITE_REG(REG_OPMODE, (READ_REG(REG_OPMODE) & ~MASK_OPMODE_MODE) | OPMODE_MODE_STANDBY);
-	case mode_sleep:  return WRITE_REG(REG_OPMODE, (READ_REG(REG_OPMODE) & ~MASK_OPMODE_MODE) | OPMODE_MODE_SLEEP);
+	case transmit:	  return rmw(spi, REG_OPMODE, MASK_OPMODE_MODE, OPMODE_MODE_TRANSMIT);
+	case receive:	  return rmw(spi, REG_OPMODE, MASK_OPMODE_MODE, OPMODE_MODE_RECEIVE);
+	case synthesizer: return rmw(spi, REG_OPMODE, MASK_OPMODE_MODE, OPMODE_MODE_SYNTHESIZER);
+	case standby:	  return rmw(spi, REG_OPMODE, MASK_OPMODE_MODE, OPMODE_MODE_STANDBY);
+	case mode_sleep:  return rmw(spi, REG_OPMODE, MASK_OPMODE_MODE, OPMODE_MODE_SLEEP);
 	default:	  INVALID_PARAM;
 	}

@@ -66,28 +90,26 @@

 int rf69_set_data_mode(struct spi_device *spi, enum dataMode dataMode)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: data mode");
-	#endif

+	dev_dbg(&spi->dev, "set: data mode");
+
 	switch (dataMode) {
-	case packet:		return WRITE_REG(REG_DATAMODUL, (READ_REG(REG_DATAMODUL) & ~MASK_DATAMODUL_MODE) | DATAMODUL_MODE_PACKET);
-	case continuous:	return WRITE_REG(REG_DATAMODUL, (READ_REG(REG_DATAMODUL) & ~MASK_DATAMODUL_MODE) | DATAMODUL_MODE_CONTINUOUS);
-	case continuousNoSync:  return WRITE_REG(REG_DATAMODUL, (READ_REG(REG_DATAMODUL) & ~MASK_DATAMODUL_MODE) | DATAMODUL_MODE_CONTINUOUS_NOSYNC);
+	case packet:		return rmw(spi, REG_DATAMODUL, MASK_DATAMODUL_MODE, DATAMODUL_MODE_PACKET);
+	case continuous:	return rmw(spi, REG_DATAMODUL, MASK_DATAMODUL_MODE, DATAMODUL_MODE_CONTINUOUS);
+	case continuousNoSync:  return rmw(spi, REG_DATAMODUL, MASK_DATAMODUL_MODE, DATAMODUL_MODE_CONTINUOUS_NOSYNC);
 	default:		INVALID_PARAM;
 	}
 }

 int rf69_set_modulation(struct spi_device *spi, enum modulation modulation)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: modulation");
-	#endif

+	dev_dbg(&spi->dev, "set: modulation");
+
 	switch (modulation) {
-	case OOK:   return WRITE_REG(REG_DATAMODUL, (READ_REG(REG_DATAMODUL) & ~MASK_DATAMODUL_MODULATION_TYPE) | DATAMODUL_MODULATION_TYPE_OOK);
-	case FSK:   return WRITE_REG(REG_DATAMODUL, (READ_REG(REG_DATAMODUL) & ~MASK_DATAMODUL_MODULATION_TYPE) | DATAMODUL_MODULATION_TYPE_FSK);
-	default:    INVALID_PARAM;
+	case OOK: return rmw(spi, REG_DATAMODUL, MASK_DATAMODUL_MODULATION_TYPE, DATAMODUL_MODULATION_TYPE_OOK);
+	case FSK: return rmw(spi, REG_DATAMODUL, MASK_DATAMODUL_MODULATION_TYPE, DATAMODUL_MODULATION_TYPE_FSK);
+	default:  INVALID_PARAM;
 	}
 }

@@ -95,11 +117,9 @@
 {
 	u8 currentValue;

-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "get: mode");
-	#endif
+	dev_dbg(&spi->dev, "get: mode");

-	currentValue = READ_REG(REG_DATAMODUL);
+	currentValue = rf69_read_reg(spi, REG_DATAMODUL);

 	switch (currentValue & MASK_DATAMODUL_MODULATION_TYPE)
 	{
@@ -111,26 +131,25 @@

 int rf69_set_modulation_shaping(struct spi_device *spi, enum modShaping modShaping)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: mod shaping");
-	#endif

+	dev_dbg(&spi->dev, "set: mod shaping");
+
 	if (rf69_get_modulation(spi) == FSK)
 	{
 		switch (modShaping) {
-		case shapingOff: return WRITE_REG(REG_DATAMODUL, (READ_REG(REG_DATAMODUL) & ~MASK_DATAMODUL_MODULATION_SHAPE) | DATAMODUL_MODULATION_SHAPE_NONE);
-		case shaping1_0: return WRITE_REG(REG_DATAMODUL, (READ_REG(REG_DATAMODUL) & ~MASK_DATAMODUL_MODULATION_SHAPE) | DATAMODUL_MODULATION_SHAPE_1_0);
-		case shaping0_5: return WRITE_REG(REG_DATAMODUL, (READ_REG(REG_DATAMODUL) & ~MASK_DATAMODUL_MODULATION_SHAPE) | DATAMODUL_MODULATION_SHAPE_0_3);
-		case shaping0_3: return WRITE_REG(REG_DATAMODUL, (READ_REG(REG_DATAMODUL) & ~MASK_DATAMODUL_MODULATION_SHAPE) | DATAMODUL_MODULATION_SHAPE_0_5);
+		case shapingOff: return rmw(spi, REG_DATAMODUL, MASK_DATAMODUL_MODULATION_SHAPE, DATAMODUL_MODULATION_SHAPE_NONE);
+		case shaping1_0: return rmw(spi, REG_DATAMODUL, MASK_DATAMODUL_MODULATION_SHAPE, DATAMODUL_MODULATION_SHAPE_1_0);
+		case shaping0_5: return rmw(spi, REG_DATAMODUL, MASK_DATAMODUL_MODULATION_SHAPE, DATAMODUL_MODULATION_SHAPE_0_3);
+		case shaping0_3: return rmw(spi, REG_DATAMODUL, MASK_DATAMODUL_MODULATION_SHAPE, DATAMODUL_MODULATION_SHAPE_0_5);
 		default:	 INVALID_PARAM;
 		}
 	}
 	else
 	{
 		switch (modShaping) {
-		case shapingOff: return WRITE_REG(REG_DATAMODUL, (READ_REG(REG_DATAMODUL) & ~MASK_DATAMODUL_MODULATION_SHAPE) | DATAMODUL_MODULATION_SHAPE_NONE);
-		case shapingBR:	 return WRITE_REG(REG_DATAMODUL, (READ_REG(REG_DATAMODUL) & ~MASK_DATAMODUL_MODULATION_SHAPE) | DATAMODUL_MODULATION_SHAPE_BR);
-		case shaping2BR: return WRITE_REG(REG_DATAMODUL, (READ_REG(REG_DATAMODUL) & ~MASK_DATAMODUL_MODULATION_SHAPE) | DATAMODUL_MODULATION_SHAPE_2BR);
+		case shapingOff: return rmw(spi, REG_DATAMODUL, MASK_DATAMODUL_MODULATION_SHAPE, DATAMODUL_MODULATION_SHAPE_NONE);
+		case shapingBR:	 return rmw(spi, REG_DATAMODUL, MASK_DATAMODUL_MODULATION_SHAPE, DATAMODUL_MODULATION_SHAPE_BR);
+		case shaping2BR: return rmw(spi, REG_DATAMODUL, MASK_DATAMODUL_MODULATION_SHAPE, DATAMODUL_MODULATION_SHAPE_2BR);
 		default:	 INVALID_PARAM;
 		}
 	}
@@ -144,17 +163,12 @@
 	u8 msb;
 	u8 lsb;

-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: bit rate");
-	#endif
+	dev_dbg(&spi->dev, "set: bit rate");

 	// check input value
 	bitRate_min = F_OSC / 8388608; // 8388608 = 2^23;
 	if (bitRate < bitRate_min)
-	{
-		dev_dbg(&spi->dev, "setBitRate: illegal input param");
 		INVALID_PARAM;
-	}

 	// calculate reg settings
 	bitRate_reg = (F_OSC / bitRate);
@@ -163,9 +177,9 @@
 	lsb = (bitRate_reg&0xff);

 	// transmit to RF 69
-	retval = WRITE_REG(REG_BITRATE_MSB, msb);
+	retval = rf69_write_reg(spi, REG_BITRATE_MSB, msb);
 	if (retval)  return retval;
-	retval = WRITE_REG(REG_BITRATE_LSB, lsb);
+	retval = rf69_write_reg(spi, REG_BITRATE_LSB, lsb);
 	if (retval)  return retval;

 	return 0;
@@ -181,15 +195,10 @@
 	u8 lsb;
 	u64 factor = 1000000; // to improve precision of calculation

-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: deviation");
-	#endif
+	dev_dbg(&spi->dev, "set: deviation");

 	if (deviation < 600 || deviation > 500000) //TODO: Abh\E4ngigkeit von Bitrate beachten!!
-	{
-		dev_dbg(&spi->dev, "set_deviation: illegal input param");
 		INVALID_PARAM;
-	}

 	// calculat f step
 	f_step = F_OSC * factor;
@@ -206,13 +215,13 @@
 	if (msb & ~FDEVMASB_MASK)
 	{
 		dev_dbg(&spi->dev, "set_deviation: err in calc of msb");
-		INVALID_PARAM;
+		return -EINVAL;
 	}

 	// write to chip
-	retval = WRITE_REG(REG_FDEV_MSB, msb);
+	retval = rf69_write_reg(spi, REG_FDEV_MSB, msb);
 	if (retval)  return retval;
-	retval = WRITE_REG(REG_FDEV_LSB, lsb);
+	retval = rf69_write_reg(spi, REG_FDEV_LSB, lsb);
 	if (retval)  return retval;

 	return 0;
@@ -229,9 +238,7 @@
 	u8 lsb;
 	u64 factor = 1000000; // to improve precision of calculation

-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: frequency");
-	#endif
+	dev_dbg(&spi->dev, "set: frequency");

 	// calculat f step
 	f_step = F_OSC * factor;
@@ -250,16 +257,16 @@
 	f_reg = frequency * factor;
 	do_div(f_reg  , f_step);

-	msb = (f_reg&0xff0000) >> 16;
-	mid = (f_reg&0xff00)   >>  8;
-	lsb = (f_reg&0xff);
+	msb = (f_reg & 0xff0000) >> 16;
+	mid = (f_reg & 0xff00)   >>  8;
+	lsb = (f_reg & 0xff);

 	// write to chip
-	retval = WRITE_REG(REG_FRF_MSB, msb);
+	retval = rf69_write_reg(spi, REG_FRF_MSB, msb);
 	if (retval)  return retval;
-	retval = WRITE_REG(REG_FRF_MID, mid);
+	retval = rf69_write_reg(spi, REG_FRF_MID, mid);
 	if (retval)  return retval;
-	retval = WRITE_REG(REG_FRF_LSB, lsb);
+	retval = rf69_write_reg(spi, REG_FRF_LSB, lsb);
 	if (retval)  return retval;

 	return 0;
@@ -267,48 +274,41 @@

 int rf69_set_amplifier_0(struct spi_device *spi, enum optionOnOff optionOnOff)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: amp #0");
-	#endif
+	dev_dbg(&spi->dev, "set: amp #0");

 	switch(optionOnOff) {
-	case optionOn:	return WRITE_REG(REG_PALEVEL, (READ_REG(REG_PALEVEL) |  MASK_PALEVEL_PA0) );
-	case optionOff:	return WRITE_REG(REG_PALEVEL, (READ_REG(REG_PALEVEL) & ~MASK_PALEVEL_PA0) );
+	case optionOn:	return setBit(spi, REG_PALEVEL, MASK_PALEVEL_PA0);
+	case optionOff:	return rstBit(spi, REG_PALEVEL, MASK_PALEVEL_PA0);
 	default:	INVALID_PARAM;
 	}
 }

 int rf69_set_amplifier_1(struct spi_device *spi, enum optionOnOff optionOnOff)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: amp #1");
-	#endif
+	dev_dbg(&spi->dev, "set: amp #1");

 	switch(optionOnOff) {
-	case optionOn:	return WRITE_REG(REG_PALEVEL, (READ_REG(REG_PALEVEL) |  MASK_PALEVEL_PA1) );
-	case optionOff: return WRITE_REG(REG_PALEVEL, (READ_REG(REG_PALEVEL) & ~MASK_PALEVEL_PA1) );
+	case optionOn:	return setBit(spi, REG_PALEVEL, MASK_PALEVEL_PA1);
+	case optionOff: return rstBit(spi, REG_PALEVEL, MASK_PALEVEL_PA1);
 	default:	INVALID_PARAM;
 	}
 }

 int rf69_set_amplifier_2(struct spi_device *spi, enum optionOnOff optionOnOff)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: amp #2");
-	#endif

+	dev_dbg(&spi->dev, "set: amp #2");
+
 	switch(optionOnOff) {
-	case optionOn:	return WRITE_REG(REG_PALEVEL, (READ_REG(REG_PALEVEL) |  MASK_PALEVEL_PA2) );
-	case optionOff:	return WRITE_REG(REG_PALEVEL, (READ_REG(REG_PALEVEL) & ~MASK_PALEVEL_PA2) );
+	case optionOn:	return setBit(spi, REG_PALEVEL, MASK_PALEVEL_PA2);
+	case optionOff:	return rstBit(spi, REG_PALEVEL, MASK_PALEVEL_PA2);
 	default:	INVALID_PARAM;
 	}
 }

 int rf69_set_output_power_level(struct spi_device *spi, u8 powerLevel)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: power level");
-	#endif
+	dev_dbg(&spi->dev, "set: power level");

 	powerLevel +=18; // TODO Abh\E4ngigkeit von PA0,1,2 setting

@@ -317,63 +317,57 @@
 		INVALID_PARAM;

 	// write value
-	return WRITE_REG(REG_PALEVEL, (READ_REG(REG_PALEVEL) & ~MASK_PALEVEL_OUTPUT_POWER) | powerLevel);
+	return rmw(spi, REG_PALEVEL, MASK_PALEVEL_OUTPUT_POWER, powerLevel);
 }

 int rf69_set_pa_ramp(struct spi_device *spi, enum paRamp paRamp)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: pa ramp");
-	#endif
+	dev_dbg(&spi->dev, "set: pa ramp");

 	switch(paRamp) {
-	case ramp3400:	return WRITE_REG(REG_PARAMP, PARAMP_3400);
-	case ramp2000:	return WRITE_REG(REG_PARAMP, PARAMP_2000);
-	case ramp1000:	return WRITE_REG(REG_PARAMP, PARAMP_1000);
-	case ramp500:	return WRITE_REG(REG_PARAMP, PARAMP_500);
-	case ramp250:	return WRITE_REG(REG_PARAMP, PARAMP_250);
-	case ramp125:	return WRITE_REG(REG_PARAMP, PARAMP_125);
-	case ramp100:	return WRITE_REG(REG_PARAMP, PARAMP_100);
-	case ramp62:	return WRITE_REG(REG_PARAMP, PARAMP_62);
-	case ramp50:	return WRITE_REG(REG_PARAMP, PARAMP_50);
-	case ramp40:	return WRITE_REG(REG_PARAMP, PARAMP_40);
-	case ramp31:	return WRITE_REG(REG_PARAMP, PARAMP_31);
-	case ramp25:	return WRITE_REG(REG_PARAMP, PARAMP_25);
-	case ramp20:	return WRITE_REG(REG_PARAMP, PARAMP_20);
-	case ramp15:	return WRITE_REG(REG_PARAMP, PARAMP_15);
-	case ramp12:	return WRITE_REG(REG_PARAMP, PARAMP_12);
-	case ramp10:	return WRITE_REG(REG_PARAMP, PARAMP_10);
+	case ramp3400:	return rf69_write_reg(spi, REG_PARAMP, PARAMP_3400);
+	case ramp2000:	return rf69_write_reg(spi, REG_PARAMP, PARAMP_2000);
+	case ramp1000:	return rf69_write_reg(spi, REG_PARAMP, PARAMP_1000);
+	case ramp500:	return rf69_write_reg(spi, REG_PARAMP, PARAMP_500);
+	case ramp250:	return rf69_write_reg(spi, REG_PARAMP, PARAMP_250);
+	case ramp125:	return rf69_write_reg(spi, REG_PARAMP, PARAMP_125);
+	case ramp100:	return rf69_write_reg(spi, REG_PARAMP, PARAMP_100);
+	case ramp62:	return rf69_write_reg(spi, REG_PARAMP, PARAMP_62);
+	case ramp50:	return rf69_write_reg(spi, REG_PARAMP, PARAMP_50);
+	case ramp40:	return rf69_write_reg(spi, REG_PARAMP, PARAMP_40);
+	case ramp31:	return rf69_write_reg(spi, REG_PARAMP, PARAMP_31);
+	case ramp25:	return rf69_write_reg(spi, REG_PARAMP, PARAMP_25);
+	case ramp20:	return rf69_write_reg(spi, REG_PARAMP, PARAMP_20);
+	case ramp15:	return rf69_write_reg(spi, REG_PARAMP, PARAMP_15);
+	case ramp12:	return rf69_write_reg(spi, REG_PARAMP, PARAMP_12);
+	case ramp10:	return rf69_write_reg(spi, REG_PARAMP, PARAMP_10);
 	default:	INVALID_PARAM;
 	}
 }

 int rf69_set_antenna_impedance(struct spi_device *spi, enum antennaImpedance antennaImpedance)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: antenna impedance");
-	#endif
+	dev_dbg(&spi->dev, "set: antenna impedance");

 	switch(antennaImpedance) {
-	case fiftyOhm:	    return WRITE_REG(REG_LNA, (READ_REG(REG_LNA) & ~MASK_LNA_ZIN) );
-	case twohundretOhm: return WRITE_REG(REG_LNA, (READ_REG(REG_LNA) |  MASK_LNA_ZIN) );
+	case fiftyOhm:	    return rstBit(spi, REG_LNA, MASK_LNA_ZIN);
+	case twohundretOhm: return setBit(spi, REG_LNA, MASK_LNA_ZIN);
 	default:	    INVALID_PARAM;
 	}
 }

 int rf69_set_lna_gain(struct spi_device *spi, enum lnaGain lnaGain)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: lna gain");
-	#endif
+	dev_dbg(&spi->dev, "set: lna gain");

 	switch(lnaGain) {
-	case automatic:	 return WRITE_REG(REG_LNA, ( (READ_REG(REG_LNA) & ~MASK_LNA_GAIN) | LNA_GAIN_AUTO) );
-	case max:	 return WRITE_REG(REG_LNA, ( (READ_REG(REG_LNA) & ~MASK_LNA_GAIN) | LNA_GAIN_MAX) );
-	case maxMinus6:  return WRITE_REG(REG_LNA, ( (READ_REG(REG_LNA) & ~MASK_LNA_GAIN) | LNA_GAIN_MAX_MINUS_6) );
-	case maxMinus12: return WRITE_REG(REG_LNA, ( (READ_REG(REG_LNA) & ~MASK_LNA_GAIN) | LNA_GAIN_MAX_MINUS_12) );
-	case maxMinus24: return WRITE_REG(REG_LNA, ( (READ_REG(REG_LNA) & ~MASK_LNA_GAIN) | LNA_GAIN_MAX_MINUS_24) );
-	case maxMinus36: return WRITE_REG(REG_LNA, ( (READ_REG(REG_LNA) & ~MASK_LNA_GAIN) | LNA_GAIN_MAX_MINUS_36) );
-	case maxMinus48: return WRITE_REG(REG_LNA, ( (READ_REG(REG_LNA) & ~MASK_LNA_GAIN) | LNA_GAIN_MAX_MINUS_48) );
+	case automatic:	 return rmw(spi, REG_LNA, MASK_LNA_GAIN, LNA_GAIN_AUTO);
+	case max:	 return rmw(spi, REG_LNA, MASK_LNA_GAIN, LNA_GAIN_MAX);
+	case maxMinus6:  return rmw(spi, REG_LNA, MASK_LNA_GAIN, LNA_GAIN_MAX_MINUS_6);
+	case maxMinus12: return rmw(spi, REG_LNA, MASK_LNA_GAIN, LNA_GAIN_MAX_MINUS_12);
+	case maxMinus24: return rmw(spi, REG_LNA, MASK_LNA_GAIN, LNA_GAIN_MAX_MINUS_24);
+	case maxMinus36: return rmw(spi, REG_LNA, MASK_LNA_GAIN, LNA_GAIN_MAX_MINUS_36);
+	case maxMinus48: return rmw(spi, REG_LNA, MASK_LNA_GAIN, LNA_GAIN_MAX_MINUS_48);
 	default:	 INVALID_PARAM;
 	}
 }
@@ -382,11 +376,9 @@
 {
 	u8 currentValue;

-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "get: lna gain");
-	#endif
+	dev_dbg(&spi->dev, "get: lna gain");

-	currentValue = READ_REG(REG_LNA);
+	currentValue = rf69_read_reg(spi, REG_LNA);

 	switch (currentValue & MASK_LNA_GAIN)
 	{
@@ -404,32 +396,28 @@
 static int rf69_set_dc_cut_off_frequency_intern(struct spi_device *spi ,u8 reg, enum dccPercent dccPercent)
 {
 	switch (dccPercent) {
-	case dcc16Percent:	return WRITE_REG(reg, ( (READ_REG(reg) & ~MASK_BW_DCC_FREQ) | BW_DCC_16_PERCENT) );
-	case dcc8Percent:	return WRITE_REG(reg, ( (READ_REG(reg) & ~MASK_BW_DCC_FREQ) | BW_DCC_8_PERCENT) );
-	case dcc4Percent:	return WRITE_REG(reg, ( (READ_REG(reg) & ~MASK_BW_DCC_FREQ) | BW_DCC_4_PERCENT) );
-	case dcc2Percent:	return WRITE_REG(reg, ( (READ_REG(reg) & ~MASK_BW_DCC_FREQ) | BW_DCC_2_PERCENT) );
-	case dcc1Percent:	return WRITE_REG(reg, ( (READ_REG(reg) & ~MASK_BW_DCC_FREQ) | BW_DCC_1_PERCENT) );
-	case dcc0_5Percent:	return WRITE_REG(reg, ( (READ_REG(reg) & ~MASK_BW_DCC_FREQ) | BW_DCC_0_5_PERCENT) );
-	case dcc0_25Percent:	return WRITE_REG(reg, ( (READ_REG(reg) & ~MASK_BW_DCC_FREQ) | BW_DCC_0_25_PERCENT) );
-	case dcc0_125Percent:	return WRITE_REG(reg, ( (READ_REG(reg) & ~MASK_BW_DCC_FREQ) | BW_DCC_0_125_PERCENT) );
+	case dcc16Percent:	return rmw(spi, reg, MASK_BW_DCC_FREQ, BW_DCC_16_PERCENT);
+	case dcc8Percent:	return rmw(spi, reg, MASK_BW_DCC_FREQ, BW_DCC_8_PERCENT);
+	case dcc4Percent:	return rmw(spi, reg, MASK_BW_DCC_FREQ, BW_DCC_4_PERCENT);
+	case dcc2Percent:	return rmw(spi, reg, MASK_BW_DCC_FREQ, BW_DCC_2_PERCENT);
+	case dcc1Percent:	return rmw(spi, reg, MASK_BW_DCC_FREQ, BW_DCC_1_PERCENT);
+	case dcc0_5Percent:	return rmw(spi, reg, MASK_BW_DCC_FREQ, BW_DCC_0_5_PERCENT);
+	case dcc0_25Percent:	return rmw(spi, reg, MASK_BW_DCC_FREQ, BW_DCC_0_25_PERCENT);
+	case dcc0_125Percent:	return rmw(spi, reg, MASK_BW_DCC_FREQ, BW_DCC_0_125_PERCENT);
 	default:		INVALID_PARAM;
 	}
 }

 int rf69_set_dc_cut_off_frequency(struct spi_device *spi, enum dccPercent dccPercent)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: cut off freq");
-	#endif
+	dev_dbg(&spi->dev, "set: cut off freq");

 	return rf69_set_dc_cut_off_frequency_intern(spi, REG_RXBW, dccPercent);
 }

 int rf69_set_dc_cut_off_frequency_during_afc(struct spi_device *spi, enum dccPercent dccPercent)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: cut off freq during afc");
-	#endif
+	dev_dbg(&spi->dev, "set: cut off freq during afc");

 	return rf69_set_dc_cut_off_frequency_intern(spi, REG_AFCBW, dccPercent);
 }
@@ -442,10 +430,10 @@
 	if (exponent > 7)   INVALID_PARAM;
 	if ( (mantisse!=mantisse16) &&
 	     (mantisse!=mantisse20) &&
-             (mantisse!=mantisse24) ) INVALID_PARAM;
+	     (mantisse!=mantisse24) ) INVALID_PARAM;

 	// read old value
-	newValue = READ_REG(reg);
+	newValue = rf69_read_reg(spi, reg);

 	// "delete" mantisse and exponent = just keep the DCC setting
 	newValue = newValue & MASK_BW_DCC_FREQ;
@@ -461,76 +449,66 @@
 	newValue = newValue | exponent;

 	// write back
-	return WRITE_REG(reg, newValue);
+	return rf69_write_reg(spi, reg, newValue);
 }

 int rf69_set_bandwidth(struct spi_device *spi, enum mantisse mantisse, u8 exponent)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: band width");
-	#endif
+	dev_dbg(&spi->dev, "set: band width");

 	return rf69_set_bandwidth_intern(spi, REG_RXBW, mantisse, exponent);
 }

 int rf69_set_bandwidth_during_afc(struct spi_device *spi, enum mantisse mantisse, u8 exponent)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: band width during afc");
-	#endif
+	dev_dbg(&spi->dev, "set: band width during afc");

 	return rf69_set_bandwidth_intern(spi, REG_AFCBW, mantisse, exponent);
 }

 int rf69_set_ook_threshold_type(struct spi_device *spi, enum thresholdType thresholdType)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: threshold type");
-	#endif
+	dev_dbg(&spi->dev, "set: threshold type");

 	switch (thresholdType)
 	{
-	case fixed:	return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESTYPE) | OOKPEAK_THRESHTYPE_FIXED) );
-	case peak:	return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESTYPE) | OOKPEAK_THRESHTYPE_PEAK) );
-	case average:	return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESTYPE) | OOKPEAK_THRESHTYPE_AVERAGE) );
+	case fixed:	return rmw(spi, REG_OOKPEAK, MASK_OOKPEAK_THRESTYPE, OOKPEAK_THRESHTYPE_FIXED);
+	case peak:	return rmw(spi, REG_OOKPEAK, MASK_OOKPEAK_THRESTYPE, OOKPEAK_THRESHTYPE_PEAK);
+	case average:	return rmw(spi, REG_OOKPEAK, MASK_OOKPEAK_THRESTYPE, OOKPEAK_THRESHTYPE_AVERAGE);
 	default:	INVALID_PARAM;
 	}
 }

 int rf69_set_ook_threshold_step(struct spi_device *spi, enum thresholdStep thresholdStep)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: threshold step");
-	#endif
+	dev_dbg(&spi->dev, "set: threshold step");

 	switch (thresholdStep) {
-	case step_0_5db: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESSTEP) | OOKPEAK_THRESHSTEP_0_5_DB) );
-	case step_1_0db: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESSTEP) | OOKPEAK_THRESHSTEP_1_0_DB) );
-	case step_1_5db: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESSTEP) | OOKPEAK_THRESHSTEP_1_5_DB) );
-	case step_2_0db: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESSTEP) | OOKPEAK_THRESHSTEP_2_0_DB) );
-	case step_3_0db: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESSTEP) | OOKPEAK_THRESHSTEP_3_0_DB) );
-	case step_4_0db: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESSTEP) | OOKPEAK_THRESHSTEP_4_0_DB) );
-	case step_5_0db: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESSTEP) | OOKPEAK_THRESHSTEP_5_0_DB) );
-	case step_6_0db: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESSTEP) | OOKPEAK_THRESHSTEP_6_0_DB) );
+	case step_0_5db: return rmw(spi, REG_OOKPEAK, MASK_OOKPEAK_THRESSTEP, OOKPEAK_THRESHSTEP_0_5_DB);
+	case step_1_0db: return rmw(spi, REG_OOKPEAK, MASK_OOKPEAK_THRESSTEP, OOKPEAK_THRESHSTEP_1_0_DB);
+	case step_1_5db: return rmw(spi, REG_OOKPEAK, MASK_OOKPEAK_THRESSTEP, OOKPEAK_THRESHSTEP_1_5_DB);
+	case step_2_0db: return rmw(spi, REG_OOKPEAK, MASK_OOKPEAK_THRESSTEP, OOKPEAK_THRESHSTEP_2_0_DB);
+	case step_3_0db: return rmw(spi, REG_OOKPEAK, MASK_OOKPEAK_THRESSTEP, OOKPEAK_THRESHSTEP_3_0_DB);
+	case step_4_0db: return rmw(spi, REG_OOKPEAK, MASK_OOKPEAK_THRESSTEP, OOKPEAK_THRESHSTEP_4_0_DB);
+	case step_5_0db: return rmw(spi, REG_OOKPEAK, MASK_OOKPEAK_THRESSTEP, OOKPEAK_THRESHSTEP_5_0_DB);
+	case step_6_0db: return rmw(spi, REG_OOKPEAK, MASK_OOKPEAK_THRESSTEP, OOKPEAK_THRESHSTEP_6_0_DB);
 	default:	 INVALID_PARAM;
 	}
 }

 int rf69_set_ook_threshold_dec(struct spi_device *spi, enum thresholdDecrement thresholdDecrement)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: threshold decrement");
-	#endif
+	dev_dbg(&spi->dev, "set: threshold decrement");

 	switch (thresholdDecrement) {
-	case dec_every8th: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESDEC) | OOKPEAK_THRESHDEC_EVERY_8TH) );
-	case dec_every4th: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESDEC) | OOKPEAK_THRESHDEC_EVERY_4TH) );
-	case dec_every2nd: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESDEC) | OOKPEAK_THRESHDEC_EVERY_2ND) );
-	case dec_once:	   return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESDEC) | OOKPEAK_THRESHDEC_ONCE) );
-	case dec_twice:	   return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESDEC) | OOKPEAK_THRESHDEC_TWICE) );
-	case dec_4times:   return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESDEC) | OOKPEAK_THRESHDEC_4_TIMES) );
-	case dec_8times:   return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESDEC) | OOKPEAK_THRESHDEC_8_TIMES) );
-	case dec_16times:  return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESDEC) | OOKPEAK_THRESHDEC_16_TIMES) );
+	case dec_every8th: return rmw(spi, REG_OOKPEAK, MASK_OOKPEAK_THRESDEC, OOKPEAK_THRESHDEC_EVERY_8TH);
+	case dec_every4th: return rmw(spi, REG_OOKPEAK, MASK_OOKPEAK_THRESDEC, OOKPEAK_THRESHDEC_EVERY_4TH);
+	case dec_every2nd: return rmw(spi, REG_OOKPEAK, MASK_OOKPEAK_THRESDEC, OOKPEAK_THRESHDEC_EVERY_2ND);
+	case dec_once:	   return rmw(spi, REG_OOKPEAK, MASK_OOKPEAK_THRESDEC, OOKPEAK_THRESHDEC_ONCE);
+	case dec_twice:	   return rmw(spi, REG_OOKPEAK, MASK_OOKPEAK_THRESDEC, OOKPEAK_THRESHDEC_TWICE);
+	case dec_4times:   return rmw(spi, REG_OOKPEAK, MASK_OOKPEAK_THRESDEC, OOKPEAK_THRESHDEC_4_TIMES);
+	case dec_8times:   return rmw(spi, REG_OOKPEAK, MASK_OOKPEAK_THRESDEC, OOKPEAK_THRESHDEC_8_TIMES);
+	case dec_16times:  return rmw(spi, REG_OOKPEAK, MASK_OOKPEAK_THRESDEC, OOKPEAK_THRESHDEC_16_TIMES);
 	default:	   INVALID_PARAM;
 	}
 }
@@ -542,9 +520,7 @@
 	u8 regaddr;
 	u8 regValue;

-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: DIO mapping");
-	#endif
+	dev_dbg(&spi->dev, "set: DIO mapping");

 	// check DIO number
 	if (DIONumber > 5) INVALID_PARAM;
@@ -559,88 +535,78 @@
 	}

 	// read reg
-	regValue=READ_REG(regaddr);
+	regValue=rf69_read_reg(spi, regaddr);
 	// delete old value
 	regValue = regValue & ~mask;
 	// add new value
 	regValue = regValue | value << shift;
 	// write back
-	return WRITE_REG(regaddr,regValue);
+	return rf69_write_reg(spi, regaddr,regValue);
 }

 bool rf69_get_flag(struct spi_device *spi, enum flag flag)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "get: flag");
-	#endif
+	dev_dbg(&spi->dev, "get: flag");

 	switch(flag) {
-	case modeSwitchCompleted:     return (READ_REG(REG_IRQFLAGS1) & MASK_IRQFLAGS1_MODE_READY);
-	case readyToReceive:	      return (READ_REG(REG_IRQFLAGS1) & MASK_IRQFLAGS1_RX_READY);
-	case readyToSend:	      return (READ_REG(REG_IRQFLAGS1) & MASK_IRQFLAGS1_TX_READY);
-	case pllLocked:		      return (READ_REG(REG_IRQFLAGS1) & MASK_IRQFLAGS1_PLL_LOCK);
-	case rssiExceededThreshold:   return (READ_REG(REG_IRQFLAGS1) & MASK_IRQFLAGS1_RSSI);
-	case timeout:		      return (READ_REG(REG_IRQFLAGS1) & MASK_IRQFLAGS1_TIMEOUT);
-	case automode:		      return (READ_REG(REG_IRQFLAGS1) & MASK_IRQFLAGS1_AUTOMODE);
-	case syncAddressMatch:	      return (READ_REG(REG_IRQFLAGS1) & MASK_IRQFLAGS1_SYNC_ADDRESS_MATCH);
-	case fifoFull:		      return (READ_REG(REG_IRQFLAGS2) & MASK_IRQFLAGS2_FIFO_FULL);
-/*	case fifoNotEmpty:	      return (READ_REG(REG_IRQFLAGS2) & MASK_IRQFLAGS2_FIFO_NOT_EMPTY); */
-	case fifoEmpty:		      return !(READ_REG(REG_IRQFLAGS2) & MASK_IRQFLAGS2_FIFO_NOT_EMPTY);
-	case fifoLevelBelowThreshold: return (READ_REG(REG_IRQFLAGS2) & MASK_IRQFLAGS2_FIFO_LEVEL);
-	case fifoOverrun:	      return (READ_REG(REG_IRQFLAGS2) & MASK_IRQFLAGS2_FIFO_OVERRUN);
-	case packetSent:	      return (READ_REG(REG_IRQFLAGS2) & MASK_IRQFLAGS2_PACKET_SENT);
-	case payloadReady:	      return (READ_REG(REG_IRQFLAGS2) & MASK_IRQFLAGS2_PAYLOAD_READY);
-	case crcOk:		      return (READ_REG(REG_IRQFLAGS2) & MASK_IRQFLAGS2_CRC_OK);
-	case batteryLow:	      return (READ_REG(REG_IRQFLAGS2) & MASK_IRQFLAGS2_LOW_BAT);
+	case modeSwitchCompleted:     return (rf69_read_reg(spi, REG_IRQFLAGS1) & MASK_IRQFLAGS1_MODE_READY);
+	case readyToReceive:	      return (rf69_read_reg(spi, REG_IRQFLAGS1) & MASK_IRQFLAGS1_RX_READY);
+	case readyToSend:	      return (rf69_read_reg(spi, REG_IRQFLAGS1) & MASK_IRQFLAGS1_TX_READY);
+	case pllLocked:		      return (rf69_read_reg(spi, REG_IRQFLAGS1) & MASK_IRQFLAGS1_PLL_LOCK);
+	case rssiExceededThreshold:   return (rf69_read_reg(spi, REG_IRQFLAGS1) & MASK_IRQFLAGS1_RSSI);
+	case timeout:		      return (rf69_read_reg(spi, REG_IRQFLAGS1) & MASK_IRQFLAGS1_TIMEOUT);
+	case automode:		      return (rf69_read_reg(spi, REG_IRQFLAGS1) & MASK_IRQFLAGS1_AUTOMODE);
+	case syncAddressMatch:	      return (rf69_read_reg(spi, REG_IRQFLAGS1) & MASK_IRQFLAGS1_SYNC_ADDRESS_MATCH);
+	case fifoFull:		      return (rf69_read_reg(spi, REG_IRQFLAGS2) & MASK_IRQFLAGS2_FIFO_FULL);
+/*	case fifoNotEmpty:	      return (rf69_read_reg(spi, REG_IRQFLAGS2) & MASK_IRQFLAGS2_FIFO_NOT_EMPTY); */
+	case fifoEmpty:		      return !(rf69_read_reg(spi, REG_IRQFLAGS2) & MASK_IRQFLAGS2_FIFO_NOT_EMPTY);
+	case fifoLevelBelowThreshold: return (rf69_read_reg(spi, REG_IRQFLAGS2) & MASK_IRQFLAGS2_FIFO_LEVEL);
+	case fifoOverrun:	      return (rf69_read_reg(spi, REG_IRQFLAGS2) & MASK_IRQFLAGS2_FIFO_OVERRUN);
+	case packetSent:	      return (rf69_read_reg(spi, REG_IRQFLAGS2) & MASK_IRQFLAGS2_PACKET_SENT);
+	case payloadReady:	      return (rf69_read_reg(spi, REG_IRQFLAGS2) & MASK_IRQFLAGS2_PAYLOAD_READY);
+	case crcOk:		      return (rf69_read_reg(spi, REG_IRQFLAGS2) & MASK_IRQFLAGS2_CRC_OK);
+	case batteryLow:	      return (rf69_read_reg(spi, REG_IRQFLAGS2) & MASK_IRQFLAGS2_LOW_BAT);
 	default:		      return false;
 	}
 }

 int rf69_reset_flag(struct spi_device *spi, enum flag flag)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "reset: flag");
-	#endif
+	dev_dbg(&spi->dev, "reset: flag");

 	switch(flag) {
-	case rssiExceededThreshold: return WRITE_REG(REG_IRQFLAGS1, MASK_IRQFLAGS1_RSSI);
-	case syncAddressMatch:	    return WRITE_REG(REG_IRQFLAGS1, MASK_IRQFLAGS1_SYNC_ADDRESS_MATCH);
-	case fifoOverrun:	    return WRITE_REG(REG_IRQFLAGS2, MASK_IRQFLAGS2_FIFO_OVERRUN);
+	case rssiExceededThreshold: return rf69_write_reg(spi, REG_IRQFLAGS1, MASK_IRQFLAGS1_RSSI);
+	case syncAddressMatch:	    return rf69_write_reg(spi, REG_IRQFLAGS1, MASK_IRQFLAGS1_SYNC_ADDRESS_MATCH);
+	case fifoOverrun:	    return rf69_write_reg(spi, REG_IRQFLAGS2, MASK_IRQFLAGS2_FIFO_OVERRUN);
 	default:		    INVALID_PARAM;
 	}
 }

 int rf69_set_rssi_threshold(struct spi_device *spi, u8 threshold)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: rssi threshold");
-	#endif
+	dev_dbg(&spi->dev, "set: rssi threshold");

 	/* no value check needed - u8 exactly matches register size */

-	return WRITE_REG(REG_RSSITHRESH, threshold);
+	return rf69_write_reg(spi, REG_RSSITHRESH, threshold);
 }

 int rf69_set_rx_start_timeout(struct spi_device *spi, u8 timeout)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: start timeout");
-	#endif
+	dev_dbg(&spi->dev, "set: start timeout");

 	/* no value check needed - u8 exactly matches register size */

-	return WRITE_REG(REG_RXTIMEOUT1, timeout);
+	return rf69_write_reg(spi, REG_RXTIMEOUT1, timeout);
 }

 int rf69_set_rssi_timeout(struct spi_device *spi, u8 timeout)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: rssi timeout");
-	#endif
+	dev_dbg(&spi->dev, "set: rssi timeout");

 	/* no value check needed - u8 exactly matches register size */

-	return WRITE_REG(REG_RXTIMEOUT2, timeout);
+	return rf69_write_reg(spi, REG_RXTIMEOUT2, timeout);
 }

 int rf69_set_preamble_length(struct spi_device *spi, u16 preambleLength)
@@ -648,9 +614,7 @@
 	int retval;
 	u8 msb, lsb;

-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: preample length");
-	#endif
+	dev_dbg(&spi->dev, "set: preample length");

 	/* no value check needed - u16 exactly matches register size */

@@ -659,172 +623,146 @@
 	lsb = (preambleLength&0xff);

 	/* transmit to chip */
-	retval = WRITE_REG(REG_PREAMBLE_MSB, msb);
+	retval = rf69_write_reg(spi, REG_PREAMBLE_MSB, msb);
 	if (retval) return retval;
-	retval = WRITE_REG(REG_PREAMBLE_LSB, lsb);
+	retval = rf69_write_reg(spi, REG_PREAMBLE_LSB, lsb);

 	return retval;
 }

 int rf69_set_sync_enable(struct spi_device *spi, enum optionOnOff optionOnOff)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: sync enable");
-	#endif
+	dev_dbg(&spi->dev, "set: sync enable");

 	switch(optionOnOff) {
-	case optionOn:	return WRITE_REG(REG_SYNC_CONFIG, (READ_REG(REG_SYNC_CONFIG) |  MASK_SYNC_CONFIG_SYNC_ON) );
-	case optionOff:	return WRITE_REG(REG_SYNC_CONFIG, (READ_REG(REG_SYNC_CONFIG) & ~MASK_SYNC_CONFIG_SYNC_ON) );
+	case optionOn:	return setBit(spi, REG_SYNC_CONFIG, MASK_SYNC_CONFIG_SYNC_ON);
+	case optionOff:	return rstBit(spi, REG_SYNC_CONFIG, MASK_SYNC_CONFIG_SYNC_ON);
 	default:	INVALID_PARAM;
 	}
 }

 int rf69_set_fifo_fill_condition(struct spi_device *spi, enum fifoFillCondition fifoFillCondition)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: fifo fill condition");
-	#endif
+	dev_dbg(&spi->dev, "set: fifo fill condition");

 	switch(fifoFillCondition) {
-	case always:		 return WRITE_REG(REG_SYNC_CONFIG, (READ_REG(REG_SYNC_CONFIG) |  MASK_SYNC_CONFIG_FIFO_FILL_CONDITION) );
-	case afterSyncInterrupt: return WRITE_REG(REG_SYNC_CONFIG, (READ_REG(REG_SYNC_CONFIG) & ~MASK_SYNC_CONFIG_FIFO_FILL_CONDITION) );
+	case always:		 return setBit(spi, REG_SYNC_CONFIG, MASK_SYNC_CONFIG_FIFO_FILL_CONDITION);
+	case afterSyncInterrupt: return rstBit(spi, REG_SYNC_CONFIG, MASK_SYNC_CONFIG_FIFO_FILL_CONDITION);
 	default:		 INVALID_PARAM;
 	}
 }

 int rf69_set_sync_size(struct spi_device *spi, u8 syncSize)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: sync size");
-	#endif
+	dev_dbg(&spi->dev, "set: sync size");

 	// check input value
 	if (syncSize > 0x07)
 		INVALID_PARAM;

 	// write value
-	return WRITE_REG(REG_SYNC_CONFIG, (READ_REG(REG_SYNC_CONFIG) & ~MASK_SYNC_CONFIG_SYNC_SIZE) | (syncSize << 3) );
+	return rmw(spi, REG_SYNC_CONFIG, MASK_SYNC_CONFIG_SYNC_SIZE, (syncSize << 3));
 }

 int rf69_set_sync_tolerance(struct spi_device *spi, u8 syncTolerance)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: sync tolerance");
-	#endif
+	dev_dbg(&spi->dev, "set: sync tolerance");

 	// check input value
 	if (syncTolerance > 0x07)
 		INVALID_PARAM;

 	// write value
-	return WRITE_REG(REG_SYNC_CONFIG, (READ_REG(REG_SYNC_CONFIG) & ~MASK_SYNC_CONFIG_SYNC_SIZE) | syncTolerance);
+	return rmw(spi, REG_SYNC_CONFIG, MASK_SYNC_CONFIG_SYNC_SIZE, syncTolerance);
 }

 int rf69_set_sync_values(struct spi_device *spi, u8 syncValues[8])
 {
 	int retval = 0;

-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: sync values");
-	#endif
+	dev_dbg(&spi->dev, "set: sync values");

-	retval += WRITE_REG(REG_SYNCVALUE1, syncValues[0]);
-	retval += WRITE_REG(REG_SYNCVALUE2, syncValues[1]);
-	retval += WRITE_REG(REG_SYNCVALUE3, syncValues[2]);
-	retval += WRITE_REG(REG_SYNCVALUE4, syncValues[3]);
-	retval += WRITE_REG(REG_SYNCVALUE5, syncValues[4]);
-	retval += WRITE_REG(REG_SYNCVALUE6, syncValues[5]);
-	retval += WRITE_REG(REG_SYNCVALUE7, syncValues[6]);
-	retval += WRITE_REG(REG_SYNCVALUE8, syncValues[7]);
+	retval += rf69_write_reg(spi, REG_SYNCVALUE1, syncValues[0]);
+	retval += rf69_write_reg(spi, REG_SYNCVALUE2, syncValues[1]);
+	retval += rf69_write_reg(spi, REG_SYNCVALUE3, syncValues[2]);
+	retval += rf69_write_reg(spi, REG_SYNCVALUE4, syncValues[3]);
+	retval += rf69_write_reg(spi, REG_SYNCVALUE5, syncValues[4]);
+	retval += rf69_write_reg(spi, REG_SYNCVALUE6, syncValues[5]);
+	retval += rf69_write_reg(spi, REG_SYNCVALUE7, syncValues[6]);
+	retval += rf69_write_reg(spi, REG_SYNCVALUE8, syncValues[7]);

 	return retval;
 }

 int rf69_set_packet_format(struct spi_device * spi, enum packetFormat packetFormat)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: packet format");
-	#endif
+	dev_dbg(&spi->dev, "set: packet format");

 	switch(packetFormat) {
-	case packetLengthVar: return WRITE_REG(REG_PACKETCONFIG1, (READ_REG(REG_PACKETCONFIG1) |  MASK_PACKETCONFIG1_PAKET_FORMAT_VARIABLE) );
-	case packetLengthFix: return WRITE_REG(REG_PACKETCONFIG1, (READ_REG(REG_PACKETCONFIG1) & ~MASK_PACKETCONFIG1_PAKET_FORMAT_VARIABLE) );
+	case packetLengthVar: return setBit(spi, REG_PACKETCONFIG1, MASK_PACKETCONFIG1_PAKET_FORMAT_VARIABLE);
+	case packetLengthFix: return rstBit(spi, REG_PACKETCONFIG1, MASK_PACKETCONFIG1_PAKET_FORMAT_VARIABLE);
 	default:	      INVALID_PARAM;
 	}
 }

 int rf69_set_crc_enable(struct spi_device *spi, enum optionOnOff optionOnOff)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: crc enable");
-	#endif
+	dev_dbg(&spi->dev, "set: crc enable");

 	switch(optionOnOff) {
-	case optionOn:	return WRITE_REG(REG_PACKETCONFIG1, (READ_REG(REG_PACKETCONFIG1) |  MASK_PACKETCONFIG1_CRC_ON) );
-	case optionOff:	return WRITE_REG(REG_PACKETCONFIG1, (READ_REG(REG_PACKETCONFIG1) & ~MASK_PACKETCONFIG1_CRC_ON) );
+	case optionOn:	return setBit(spi, REG_PACKETCONFIG1, MASK_PACKETCONFIG1_CRC_ON);
+	case optionOff:	return rstBit(spi, REG_PACKETCONFIG1, MASK_PACKETCONFIG1_CRC_ON);
 	default:	INVALID_PARAM;
 	}
 }

 int rf69_set_adressFiltering(struct spi_device *spi, enum addressFiltering addressFiltering)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: address filtering");
-	#endif
+	dev_dbg(&spi->dev, "set: address filtering");

 	switch (addressFiltering) {
-	case filteringOff:	     return WRITE_REG(REG_PACKETCONFIG1, ( (READ_REG(REG_PACKETCONFIG1) & ~MASK_PACKETCONFIG1_ADDRESSFILTERING) | PACKETCONFIG1_ADDRESSFILTERING_OFF) );
-	case nodeAddress:	     return WRITE_REG(REG_PACKETCONFIG1, ( (READ_REG(REG_PACKETCONFIG1) & ~MASK_PACKETCONFIG1_ADDRESSFILTERING) | PACKETCONFIG1_ADDRESSFILTERING_NODE) );
-	case nodeOrBroadcastAddress: return WRITE_REG(REG_PACKETCONFIG1, ( (READ_REG(REG_PACKETCONFIG1) & ~MASK_PACKETCONFIG1_ADDRESSFILTERING) | PACKETCONFIG1_ADDRESSFILTERING_NODEBROADCAST) );
+	case filteringOff:	     return rmw(spi, REG_PACKETCONFIG1, MASK_PACKETCONFIG1_ADDRESSFILTERING, PACKETCONFIG1_ADDRESSFILTERING_OFF);
+	case nodeAddress:	     return rmw(spi, REG_PACKETCONFIG1, MASK_PACKETCONFIG1_ADDRESSFILTERING, PACKETCONFIG1_ADDRESSFILTERING_NODE);
+	case nodeOrBroadcastAddress: return rmw(spi, REG_PACKETCONFIG1, MASK_PACKETCONFIG1_ADDRESSFILTERING, PACKETCONFIG1_ADDRESSFILTERING_NODEBROADCAST);
 	default:		     INVALID_PARAM;
 	}
 }

 int rf69_set_payload_length(struct spi_device *spi, u8 payloadLength)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: payload length");
-	#endif
+	dev_dbg(&spi->dev, "set: payload length");

-	return WRITE_REG(REG_PAYLOAD_LENGTH, payloadLength);
+	return rf69_write_reg(spi, REG_PAYLOAD_LENGTH, payloadLength);
 }

 u8  rf69_get_payload_length(struct spi_device *spi)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "get: payload length");
-	#endif
+	dev_dbg(&spi->dev, "get: payload length");

-	return (u8) READ_REG(REG_PAYLOAD_LENGTH);
+	return (u8) rf69_read_reg(spi, REG_PAYLOAD_LENGTH);
 }

 int rf69_set_node_address(struct spi_device *spi, u8 nodeAddress)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: node address");
-	#endif
+	dev_dbg(&spi->dev, "set: node address");

-	return WRITE_REG(REG_NODEADRS, nodeAddress);
+	return rf69_write_reg(spi, REG_NODEADRS, nodeAddress);
 }

 int rf69_set_broadcast_address(struct spi_device *spi, u8 broadcastAddress)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: broadcast address");
-	#endif
+	dev_dbg(&spi->dev, "set: broadcast address");

-	return WRITE_REG(REG_BROADCASTADRS, broadcastAddress);
+	return rf69_write_reg(spi, REG_BROADCASTADRS, broadcastAddress);
 }

 int rf69_set_tx_start_condition(struct spi_device *spi, enum txStartCondition txStartCondition)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: start condition");
-	#endif
+	dev_dbg(&spi->dev, "set: start condition");

 	switch(txStartCondition) {
-	case fifoLevel:	   return WRITE_REG(REG_FIFO_THRESH, (READ_REG(REG_FIFO_THRESH) & ~MASK_FIFO_THRESH_TXSTART) );
-	case fifoNotEmpty: return WRITE_REG(REG_FIFO_THRESH, (READ_REG(REG_FIFO_THRESH) |  MASK_FIFO_THRESH_TXSTART) );
+	case fifoLevel:	   return rstBit(spi, REG_FIFO_THRESH, MASK_FIFO_THRESH_TXSTART);
+	case fifoNotEmpty: return setBit(spi, REG_FIFO_THRESH, MASK_FIFO_THRESH_TXSTART);
 	default:	   INVALID_PARAM;
 	}
 }
@@ -833,33 +771,30 @@
 {
 	int retval;

-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: fifo threshold");
-	#endif
+	dev_dbg(&spi->dev, "set: fifo threshold");

-	// check input value
+	/* check input value */
 	if (threshold & 0x80)
 		INVALID_PARAM;

-	// write value
-	retval = WRITE_REG(REG_FIFO_THRESH, (READ_REG(REG_FIFO_THRESH) & ~MASK_FIFO_THRESH_VALUE) | threshold);
+	/* write value */
+	retval = rmw(spi, REG_FIFO_THRESH, MASK_FIFO_THRESH_VALUE, threshold);
 	if (retval)
 		return retval;

-	// access the fifo to activate new threshold
-	return rf69_read_fifo (spi, (u8*) &retval, 1); // retval used as buffer
+	/* access the fifo to activate new threshold
+	 * retval (mis)used as buffer here*/
+	return rf69_read_fifo (spi, (u8*) &retval, 1);
 }

 int rf69_set_dagc(struct spi_device *spi, enum dagc dagc)
 {
-	#ifdef DEBUG
-		dev_dbg(&spi->dev, "set: dagc");
-	#endif
+	dev_dbg(&spi->dev, "set: dagc");

 	switch(dagc) {
-	case normalMode:		 return WRITE_REG(REG_TESTDAGC, DAGC_NORMAL);
-	case improve:			 return WRITE_REG(REG_TESTDAGC, DAGC_IMPROVED_LOWBETA0);
-	case improve4LowModulationIndex: return WRITE_REG(REG_TESTDAGC, DAGC_IMPROVED_LOWBETA1);
+	case normalMode:		 return rf69_write_reg(spi, REG_TESTDAGC, DAGC_NORMAL);
+	case improve:			 return rf69_write_reg(spi, REG_TESTDAGC, DAGC_IMPROVED_LOWBETA0);
+	case improve4LowModulationIndex: return rf69_write_reg(spi, REG_TESTDAGC, DAGC_IMPROVED_LOWBETA1);
 	default:			 INVALID_PARAM;
 	}
 }
@@ -871,15 +806,14 @@
 	#ifdef DEBUG_FIFO_ACCESS
 		int i;
 	#endif
+
 	struct spi_transfer transfer;
 	u8 local_buffer[FIFO_SIZE + 1];
 	int retval;

 	if (size > FIFO_SIZE)
 	{
-		#ifdef DEBUG
-			dev_dbg(&spi->dev, "read fifo: passed in buffer bigger then internal buffer \n");
-		#endif
+		dev_dbg(&spi->dev, "read fifo: passed in buffer bigger then internal buffer \n");
 		return -EMSGSIZE;
 	}

@@ -912,9 +846,7 @@

 	if (size > FIFO_SIZE)
 	{
-		#ifdef DEBUG
-			dev_dbg(&spi->dev, "read fifo: passed in buffer bigger then internal buffer \n");
-		#endif
+		dev_dbg(&spi->dev, "read fifo: passed in buffer bigger then internal buffer \n");
 		return -EMSGSIZE;
 	}



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