diff options
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/adc/ina2xx-adc.c | 57 |
1 files changed, 38 insertions, 19 deletions
diff --git a/drivers/iio/adc/ina2xx-adc.c b/drivers/iio/adc/ina2xx-adc.c index 0845acaeaa8a..0635a79864bf 100644 --- a/drivers/iio/adc/ina2xx-adc.c +++ b/drivers/iio/adc/ina2xx-adc.c @@ -699,13 +699,10 @@ static const struct iio_chan_spec ina219_channels[] = { IIO_CHAN_SOFT_TIMESTAMP(4), }; -static int ina2xx_work_buffer(struct iio_dev *indio_dev) +static int ina2xx_conversion_ready(struct iio_dev *indio_dev) { struct ina2xx_chip_info *chip = iio_priv(indio_dev); - /* data buffer needs space for channel data and timestap */ - unsigned short data[4 + sizeof(s64)/sizeof(short)]; - int bit, ret, i = 0; - s64 time; + int ret; unsigned int alert; /* @@ -719,22 +716,29 @@ static int ina2xx_work_buffer(struct iio_dev *indio_dev) * For now, we do an extra read of the MASK_ENABLE register (INA226) * resp. the BUS_VOLTAGE register (INA219). */ - if (!chip->allow_async_readout) - do { - if (chip->config->chip_id == ina226) { - ret = regmap_read(chip->regmap, - INA226_MASK_ENABLE, &alert); - alert &= INA226_CVRF; - } else { - ret = regmap_read(chip->regmap, - INA2XX_BUS_VOLTAGE, &alert); - alert &= INA219_CNVR; - } + if (chip->config->chip_id == ina226) { + ret = regmap_read(chip->regmap, + INA226_MASK_ENABLE, &alert); + alert &= INA226_CVRF; + } else { + ret = regmap_read(chip->regmap, + INA2XX_BUS_VOLTAGE, &alert); + alert &= INA219_CNVR; + } - if (ret < 0) - return ret; + if (ret < 0) + return ret; + + return !!alert; +} - } while (!alert); +static int ina2xx_work_buffer(struct iio_dev *indio_dev) +{ + struct ina2xx_chip_info *chip = iio_priv(indio_dev); + /* data buffer needs space for channel data and timestap */ + unsigned short data[4 + sizeof(s64)/sizeof(short)]; + int bit, ret, i = 0; + s64 time; time = iio_get_time_ns(indio_dev); @@ -778,6 +782,21 @@ static int ina2xx_capture_thread(void *data) ktime_get_ts64(&next); do { + while (!chip->allow_async_readout) { + ret = ina2xx_conversion_ready(indio_dev); + if (ret < 0) + return ret; + + /* + * If the conversion was not yet finished, + * reset the reference timestamp. + */ + if (ret == 0) + ktime_get_ts64(&next); + else + break; + } + ret = ina2xx_work_buffer(indio_dev); if (ret < 0) return ret; |