From: Marcus Wolf <li...@wolf-entwicklungen.de>

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 <li...@wolf-entwicklungen.de>
---
 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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