[PATCH 6/8 v2] staging: pi433: use defines for shifting register values

[Valentin Vidic]

Avoid shifting by magic numbers and use defines instead.

Signed-off-by: Valentin Vidic <valentin.vi...@carnet.hr>
---
v2: - drop change for SHIFT_DATAMODUL_MODULATION_TYPE
    - move shifting to the header file

 drivers/staging/pi433/rf69.c           | 16 ++++++++--------
 drivers/staging/pi433/rf69_registers.h |  8 ++++++++
 2 files changed, 16 insertions(+), 8 deletions(-)

diff --git a/drivers/staging/pi433/rf69.c b/drivers/staging/pi433/rf69.c
index f77ecd60f43a..ce259b4f0b0e 100644
--- a/drivers/staging/pi433/rf69.c
+++ b/drivers/staging/pi433/rf69.c
@@ -340,14 +340,14 @@ enum lnaGain rf69_get_lna_gain(struct spi_device *spi)
 
        currentValue = rf69_read_reg(spi, REG_LNA);
 
-       switch (currentValue & MASK_LNA_CURRENT_GAIN >> 3) { // improvement: 
change 3 to define
-       case LNA_GAIN_AUTO:         return automatic;
-       case LNA_GAIN_MAX:          return max;
-       case LNA_GAIN_MAX_MINUS_6:  return maxMinus6;
-       case LNA_GAIN_MAX_MINUS_12: return maxMinus12;
-       case LNA_GAIN_MAX_MINUS_24: return maxMinus24;
-       case LNA_GAIN_MAX_MINUS_36: return maxMinus36;
-       case LNA_GAIN_MAX_MINUS_48: return maxMinus48;
+       switch (currentValue & MASK_LNA_CURRENT_GAIN) {
+       case LNA_GAIN_AUTO_SHIFTED:         return automatic;
+       case LNA_GAIN_MAX_SHIFTED:          return max;
+       case LNA_GAIN_MAX_MINUS_6_SHIFTED:  return maxMinus6;
+       case LNA_GAIN_MAX_MINUS_12_SHIFTED: return maxMinus12;
+       case LNA_GAIN_MAX_MINUS_24_SHIFTED: return maxMinus24;
+       case LNA_GAIN_MAX_MINUS_36_SHIFTED: return maxMinus36;
+       case LNA_GAIN_MAX_MINUS_48_SHIFTED: return maxMinus48;
        default:                    return undefined;
        }
 }
diff --git a/drivers/staging/pi433/rf69_registers.h 
b/drivers/staging/pi433/rf69_registers.h
index d23b8b668ef5..6329bbf9e499 100644
--- a/drivers/staging/pi433/rf69_registers.h
+++ b/drivers/staging/pi433/rf69_registers.h
@@ -237,6 +237,7 @@
 #define  MASK_LNA_ZIN                          0x80
 #define  MASK_LNA_CURRENT_GAIN                 0x38
 #define  MASK_LNA_GAIN                         0x07
+#define  SHIFT_LNA_CURRENT_GAIN                        3
 
 #define  LNA_GAIN_AUTO                         0x00 /* default */
 #define  LNA_GAIN_MAX                          0x01
@@ -246,6 +247,13 @@
 #define  LNA_GAIN_MAX_MINUS_36                 0x05
 #define  LNA_GAIN_MAX_MINUS_48                 0x06
 
+#define  LNA_GAIN_AUTO_SHIFTED                 (LNA_GAIN_AUTO          << 
SHIFT_LNA_CURRENT_GAIN)
+#define  LNA_GAIN_MAX_SHIFTED                  (LNA_GAIN_MAX           << 
SHIFT_LNA_CURRENT_GAIN)
+#define  LNA_GAIN_MAX_MINUS_6_SHIFTED          (LNA_GAIN_MAX_MINUS_6   << 
SHIFT_LNA_CURRENT_GAIN)
+#define  LNA_GAIN_MAX_MINUS_12_SHIFTED         (LNA_GAIN_MAX_MINUS_12  << 
SHIFT_LNA_CURRENT_GAIN)
+#define  LNA_GAIN_MAX_MINUS_24_SHIFTED         (LNA_GAIN_MAX_MINUS_24  << 
SHIFT_LNA_CURRENT_GAIN)
+#define  LNA_GAIN_MAX_MINUS_36_SHIFTED         (LNA_GAIN_MAX_MINUS_36  << 
SHIFT_LNA_CURRENT_GAIN)
+#define  LNA_GAIN_MAX_MINUS_48_SHIFTED         (LNA_GAIN_MAX_MINUS_48  << 
SHIFT_LNA_CURRENT_GAIN)
 
 /* RegRxBw (0x19) and RegAfcBw (0x1A) */
 #define  MASK_BW_DCC_FREQ                      0xE0
-- 
2.15.0