Re: [PATCH v3] staging: pi433: replace simple switch statements
From: marcus . wolf
Date: Mon Jun 25 2018 - 07:09:29 EST
Reviewed-by: Marcus Wolf <Marcus.Wolf@xxxxxxxxxxxxxxxxxxxxx>
Thank you Valentin, very nice patch :-)
Valentin Vidic schrieb am 24.06.2018 18:31:
Use const array to map switch cases to resulting values.
Signed-off-by: Valentin Vidic <Valentin.Vidic@xxxxxxxxx>
---
v2: use correct type for const arrays
v3: add missing static keyword for af_map
drivers/staging/pi433/rf69.c | 233 ++++++++++++++---------------------
1 file changed, 93 insertions(+), 140 deletions(-)
diff --git a/drivers/staging/pi433/rf69.c b/drivers/staging/pi433/rf69.c
index 90280e9b006d..341d6901a801 100644
--- a/drivers/staging/pi433/rf69.c
+++ b/drivers/staging/pi433/rf69.c
@@ -111,27 +111,22 @@ static inline int rf69_read_mod_write(struct spi_device
*spi, u8 reg,
int rf69_set_mode(struct spi_device *spi, enum mode mode)
{
- switch (mode) {
- case transmit:
- return rf69_read_mod_write(spi, REG_OPMODE, MASK_OPMODE_MODE,
- OPMODE_MODE_TRANSMIT);
- case receive:
- return rf69_read_mod_write(spi, REG_OPMODE, MASK_OPMODE_MODE,
- OPMODE_MODE_RECEIVE);
- case synthesizer:
- return rf69_read_mod_write(spi, REG_OPMODE, MASK_OPMODE_MODE,
- OPMODE_MODE_SYNTHESIZER);
- case standby:
- return rf69_read_mod_write(spi, REG_OPMODE, MASK_OPMODE_MODE,
- OPMODE_MODE_STANDBY);
- case mode_sleep:
- return rf69_read_mod_write(spi, REG_OPMODE, MASK_OPMODE_MODE,
- OPMODE_MODE_SLEEP);
- default:
+ static const u8 mode_map[] = {
+ [transmit] = OPMODE_MODE_TRANSMIT,
+ [receive] = OPMODE_MODE_RECEIVE,
+ [synthesizer] = OPMODE_MODE_SYNTHESIZER,
+ [standby] = OPMODE_MODE_STANDBY,
+ [mode_sleep] = OPMODE_MODE_SLEEP,
+ };
+
+ if (unlikely(mode >= ARRAY_SIZE(mode_map))) {
dev_dbg(&spi->dev, "set: illegal input param");
return -EINVAL;
}
+ return rf69_read_mod_write(spi, REG_OPMODE, MASK_OPMODE_MODE,
+ mode_map[mode]);
+
// we are using packet mode, so this check is not really needed
// but waiting for mode ready is necessary when going from sleep because the
FIFO may not be immediately available from previous mode
//while (_mode == RF69_MODE_SLEEP && (READ_REG(REG_IRQFLAGS1) &
RF_IRQFLAGS1_MODEREADY) == 0x00); // Wait for ModeReady
@@ -145,19 +140,19 @@ int rf69_set_data_mode(struct spi_device *spi, u8
data_mode)
int rf69_set_modulation(struct spi_device *spi, enum modulation modulation)
{
- switch (modulation) {
- case OOK:
- return rf69_read_mod_write(spi, REG_DATAMODUL,
- MASK_DATAMODUL_MODULATION_TYPE,
- DATAMODUL_MODULATION_TYPE_OOK);
- case FSK:
- return rf69_read_mod_write(spi, REG_DATAMODUL,
- MASK_DATAMODUL_MODULATION_TYPE,
- DATAMODUL_MODULATION_TYPE_FSK);
- default:
+ static const u8 modulation_map[] = {
+ [OOK] = DATAMODUL_MODULATION_TYPE_OOK,
+ [FSK] = DATAMODUL_MODULATION_TYPE_FSK,
+ };
+
+ if (unlikely(modulation >= ARRAY_SIZE(modulation_map))) {
dev_dbg(&spi->dev, "set: illegal input param");
return -EINVAL;
}
+
+ return rf69_read_mod_write(spi, REG_DATAMODUL,
+ MASK_DATAMODUL_MODULATION_TYPE,
+ modulation_map[modulation]);
}
static enum modulation rf69_get_modulation(struct spi_device *spi)
@@ -373,43 +368,30 @@ int rf69_set_output_power_level(struct spi_device *spi, u8
power_level)
int rf69_set_pa_ramp(struct spi_device *spi, enum pa_ramp pa_ramp)
{
- switch (pa_ramp) {
- 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:
+ static const u8 pa_ramp_map[] = {
+ [ramp3400] = PARAMP_3400,
+ [ramp2000] = PARAMP_2000,
+ [ramp1000] = PARAMP_1000,
+ [ramp500] = PARAMP_500,
+ [ramp250] = PARAMP_250,
+ [ramp125] = PARAMP_125,
+ [ramp100] = PARAMP_100,
+ [ramp62] = PARAMP_62,
+ [ramp50] = PARAMP_50,
+ [ramp40] = PARAMP_40,
+ [ramp31] = PARAMP_31,
+ [ramp25] = PARAMP_25,
+ [ramp20] = PARAMP_20,
+ [ramp15] = PARAMP_15,
+ [ramp10] = PARAMP_10,
+ };
+
+ if (unlikely(pa_ramp >= ARRAY_SIZE(pa_ramp_map))) {
dev_dbg(&spi->dev, "set: illegal input param");
return -EINVAL;
}
+
+ return rf69_write_reg(spi, REG_PARAMP, pa_ramp_map[pa_ramp]);
}
int rf69_set_antenna_impedance(struct spi_device *spi,
@@ -428,32 +410,23 @@ int rf69_set_antenna_impedance(struct spi_device *spi,
int rf69_set_lna_gain(struct spi_device *spi, enum lna_gain lna_gain)
{
- switch (lna_gain) {
- case automatic:
- return rf69_read_mod_write(spi, REG_LNA, MASK_LNA_GAIN,
- LNA_GAIN_AUTO);
- case max:
- return rf69_read_mod_write(spi, REG_LNA, MASK_LNA_GAIN,
- LNA_GAIN_MAX);
- case max_minus_6:
- return rf69_read_mod_write(spi, REG_LNA, MASK_LNA_GAIN,
- LNA_GAIN_MAX_MINUS_6);
- case max_minus_12:
- return rf69_read_mod_write(spi, REG_LNA, MASK_LNA_GAIN,
- LNA_GAIN_MAX_MINUS_12);
- case max_minus_24:
- return rf69_read_mod_write(spi, REG_LNA, MASK_LNA_GAIN,
- LNA_GAIN_MAX_MINUS_24);
- case max_minus_36:
- return rf69_read_mod_write(spi, REG_LNA, MASK_LNA_GAIN,
- LNA_GAIN_MAX_MINUS_36);
- case max_minus_48:
- return rf69_read_mod_write(spi, REG_LNA, MASK_LNA_GAIN,
- LNA_GAIN_MAX_MINUS_48);
- default:
+ static const u8 lna_gain_map[] = {
+ [automatic] = LNA_GAIN_AUTO,
+ [max] = LNA_GAIN_MAX,
+ [max_minus_6] = LNA_GAIN_MAX_MINUS_6,
+ [max_minus_12] = LNA_GAIN_MAX_MINUS_12,
+ [max_minus_24] = LNA_GAIN_MAX_MINUS_24,
+ [max_minus_36] = LNA_GAIN_MAX_MINUS_36,
+ [max_minus_48] = LNA_GAIN_MAX_MINUS_48,
+ };
+
+ if (unlikely(lna_gain >= ARRAY_SIZE(lna_gain_map))) {
dev_dbg(&spi->dev, "set: illegal input param");
return -EINVAL;
}
+
+ return rf69_read_mod_write(spi, REG_LNA, MASK_LNA_GAIN,
+ lna_gain_map[lna_gain]);
}
static int rf69_set_bandwidth_intern(struct spi_device *spi, u8 reg,
@@ -516,43 +489,24 @@ int rf69_set_bandwidth_during_afc(struct spi_device *spi,
int rf69_set_ook_threshold_dec(struct spi_device *spi,
enum threshold_decrement threshold_decrement)
{
- switch (threshold_decrement) {
- case dec_every8th:
- return rf69_read_mod_write(spi, REG_OOKPEAK,
- MASK_OOKPEAK_THRESDEC,
- OOKPEAK_THRESHDEC_EVERY_8TH);
- case dec_every4th:
- return rf69_read_mod_write(spi, REG_OOKPEAK,
- MASK_OOKPEAK_THRESDEC,
- OOKPEAK_THRESHDEC_EVERY_4TH);
- case dec_every2nd:
- return rf69_read_mod_write(spi, REG_OOKPEAK,
- MASK_OOKPEAK_THRESDEC,
- OOKPEAK_THRESHDEC_EVERY_2ND);
- case dec_once:
- return rf69_read_mod_write(spi, REG_OOKPEAK,
- MASK_OOKPEAK_THRESDEC,
- OOKPEAK_THRESHDEC_ONCE);
- case dec_twice:
- return rf69_read_mod_write(spi, REG_OOKPEAK,
- MASK_OOKPEAK_THRESDEC,
- OOKPEAK_THRESHDEC_TWICE);
- case dec_4times:
- return rf69_read_mod_write(spi, REG_OOKPEAK,
- MASK_OOKPEAK_THRESDEC,
- OOKPEAK_THRESHDEC_4_TIMES);
- case dec_8times:
- return rf69_read_mod_write(spi, REG_OOKPEAK,
- MASK_OOKPEAK_THRESDEC,
- OOKPEAK_THRESHDEC_8_TIMES);
- case dec_16times:
- return rf69_read_mod_write(spi, REG_OOKPEAK,
- MASK_OOKPEAK_THRESDEC,
- OOKPEAK_THRESHDEC_16_TIMES);
- default:
+ static const u8 td_map[] = {
+ [dec_every8th] = OOKPEAK_THRESHDEC_EVERY_8TH,
+ [dec_every4th] = OOKPEAK_THRESHDEC_EVERY_4TH,
+ [dec_every2nd] = OOKPEAK_THRESHDEC_EVERY_2ND,
+ [dec_once] = OOKPEAK_THRESHDEC_ONCE,
+ [dec_twice] = OOKPEAK_THRESHDEC_TWICE,
+ [dec_4times] = OOKPEAK_THRESHDEC_4_TIMES,
+ [dec_8times] = OOKPEAK_THRESHDEC_8_TIMES,
+ [dec_16times] = OOKPEAK_THRESHDEC_16_TIMES,
+ };
+
+ if (unlikely(threshold_decrement >= ARRAY_SIZE(td_map))) {
dev_dbg(&spi->dev, "set: illegal input param");
return -EINVAL;
}
+
+ return rf69_read_mod_write(spi, REG_OOKPEAK, MASK_OOKPEAK_THRESDEC,
+ td_map[threshold_decrement]);
}
int rf69_set_dio_mapping(struct spi_device *spi, u8 dio_number, u8 value)
@@ -749,23 +703,21 @@ int rf69_disable_crc(struct spi_device *spi)
int rf69_set_address_filtering(struct spi_device *spi,
enum address_filtering address_filtering)
{
- switch (address_filtering) {
- case filtering_off:
- return rf69_read_mod_write(spi, REG_PACKETCONFIG1,
- MASK_PACKETCONFIG1_ADDRESSFILTERING,
- PACKETCONFIG1_ADDRESSFILTERING_OFF);
- case node_address:
- return rf69_read_mod_write(spi, REG_PACKETCONFIG1,
- MASK_PACKETCONFIG1_ADDRESSFILTERING,
- PACKETCONFIG1_ADDRESSFILTERING_NODE);
- case node_or_broadcast_address:
- return rf69_read_mod_write(spi, REG_PACKETCONFIG1,
- MASK_PACKETCONFIG1_ADDRESSFILTERING,
- PACKETCONFIG1_ADDRESSFILTERING_NODEBROADCAST);
- default:
+ static const u8 af_map[] = {
+ [filtering_off] = PACKETCONFIG1_ADDRESSFILTERING_OFF,
+ [node_address] = PACKETCONFIG1_ADDRESSFILTERING_NODE,
+ [node_or_broadcast_address] =
+ PACKETCONFIG1_ADDRESSFILTERING_NODEBROADCAST,
+ };
+
+ if (unlikely(address_filtering >= ARRAY_SIZE(af_map))) {
dev_dbg(&spi->dev, "set: illegal input param");
return -EINVAL;
}
+
+ return rf69_read_mod_write(spi, REG_PACKETCONFIG1,
+ MASK_PACKETCONFIG1_ADDRESSFILTERING,
+ af_map[address_filtering]);
}
int rf69_set_payload_length(struct spi_device *spi, u8 payload_length)
@@ -824,17 +776,18 @@ int rf69_set_fifo_threshold(struct spi_device *spi, u8
threshold)
int rf69_set_dagc(struct spi_device *spi, enum dagc dagc)
{
- switch (dagc) {
- case normal_mode:
- return rf69_write_reg(spi, REG_TESTDAGC, DAGC_NORMAL);
- case improve:
- return rf69_write_reg(spi, REG_TESTDAGC, DAGC_IMPROVED_LOWBETA0);
- case improve_for_low_modulation_index:
- return rf69_write_reg(spi, REG_TESTDAGC, DAGC_IMPROVED_LOWBETA1);
- default:
+ static const u8 dagc_map[] = {
+ [normal_mode] = DAGC_NORMAL,
+ [improve] = DAGC_IMPROVED_LOWBETA0,
+ [improve_for_low_modulation_index] = DAGC_IMPROVED_LOWBETA1,
+ };
+
+ if (unlikely(dagc >= ARRAY_SIZE(dagc_map))) {
dev_dbg(&spi->dev, "set: illegal input param");
return -EINVAL;
}
+
+ return rf69_write_reg(spi, REG_TESTDAGC, dagc_map[dagc]);
}
/*-------------------------------------------------------------------------*/
--
2.18.0.rc2