diff options
Diffstat (limited to 'drivers/iio/addac/stx104.c')
| -rw-r--r-- | drivers/iio/addac/stx104.c | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/drivers/iio/addac/stx104.c b/drivers/iio/addac/stx104.c index 798f98a8872e..d1f7ce033b46 100644 --- a/drivers/iio/addac/stx104.c +++ b/drivers/iio/addac/stx104.c @@ -205,21 +205,25 @@ static int stx104_read_raw(struct iio_dev *indio_dev, return err; } - /* trigger ADC sample capture by writing to the 8-bit - * Software Strobe Register and wait for completion + /* + * Trigger ADC sample capture by writing to the 8-bit Software Strobe Register and + * wait for completion; the conversion time range is 5 microseconds to 53.68 seconds + * in steps of 25 nanoseconds. The actual Analog Input Frame Timer time interval is + * calculated as: + * ai_time_frame_ns = ( AIFT + 1 ) * ( 25 nanoseconds ). + * Where 0 <= AIFT <= 2147483648. */ err = regmap_write(priv->aio_ctl_map, STX104_SOFTWARE_STROBE, 0); if (err) { mutex_unlock(&priv->lock); return err; } - do { - err = regmap_read(priv->aio_ctl_map, STX104_ADC_STATUS, &adc_status); - if (err) { - mutex_unlock(&priv->lock); - return err; - } - } while (u8_get_bits(adc_status, STX104_CNV)); + err = regmap_read_poll_timeout(priv->aio_ctl_map, STX104_ADC_STATUS, adc_status, + !u8_get_bits(adc_status, STX104_CNV), 0, 53687092); + if (err) { + mutex_unlock(&priv->lock); + return err; + } err = regmap_read(priv->aio_data_map, STX104_ADC_DATA, &value); if (err) { |