diff options
Diffstat (limited to 'drivers/iio/adc/ad7944.c')
| -rw-r--r-- | drivers/iio/adc/ad7944.c | 13 |
1 files changed, 2 insertions, 11 deletions
diff --git a/drivers/iio/adc/ad7944.c b/drivers/iio/adc/ad7944.c index 2f949fe55873..7722cf9e8214 100644 --- a/drivers/iio/adc/ad7944.c +++ b/drivers/iio/adc/ad7944.c @@ -190,11 +190,6 @@ static int ad7944_3wire_cs_mode_init_msg(struct device *dev, struct ad7944_adc * struct spi_transfer *xfers = adc->xfers; /* - * NB: can get better performance from some SPI controllers if we use - * the same bits_per_word in every transfer. - */ - xfers[0].bits_per_word = chan->scan_type.realbits; - /* * CS is tied to CNV and we need a low to high transition to start the * conversion, so place CNV low for t_QUIET to prepare for this. */ @@ -208,7 +203,6 @@ static int ad7944_3wire_cs_mode_init_msg(struct device *dev, struct ad7944_adc * xfers[1].cs_off = 1; xfers[1].delay.value = t_conv_ns; xfers[1].delay.unit = SPI_DELAY_UNIT_NSECS; - xfers[1].bits_per_word = chan->scan_type.realbits; /* Then we can read the data during the acquisition phase */ xfers[2].rx_buf = &adc->sample.raw; @@ -228,11 +222,6 @@ static int ad7944_4wire_mode_init_msg(struct device *dev, struct ad7944_adc *adc struct spi_transfer *xfers = adc->xfers; /* - * NB: can get better performance from some SPI controllers if we use - * the same bits_per_word in every transfer. - */ - xfers[0].bits_per_word = chan->scan_type.realbits; - /* * CS has to be high for full conversion time to avoid triggering the * busy indication. */ @@ -377,6 +366,8 @@ static int ad7944_single_conversion(struct ad7944_adc *adc, if (chan->scan_type.sign == 's') *val = sign_extend32(*val, chan->scan_type.realbits - 1); + else + *val &= GENMASK(chan->scan_type.realbits - 1, 0); return IIO_VAL_INT; } |