diff options
| author | Stefan Brüns <stefan.bruens@rwth-aachen.de> | 2017-12-08 18:41:49 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-01-08 16:03:42 +0100 |
| commit | 8bcf024f06f11c0c9597ecbbfbe291a9a5092204 (patch) | |
| tree | c96d137ba7742d62454e5d1a179fff589583904d /drivers/iio | |
| parent | iio: adc: ina2xx: Remove unneeded dummy read to clear CNVR flag (diff) | |
| download | linux-8bcf024f06f11c0c9597ecbbfbe291a9a5092204.tar.xz linux-8bcf024f06f11c0c9597ecbbfbe291a9a5092204.zip | |
iio: adc: ina2xx: Do not udelay for several seconds
The conversion time can be up to 16 seconds (8 ms per channel, 2 channels,
1024 times averaging).
Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/adc/ina2xx-adc.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/iio/adc/ina2xx-adc.c b/drivers/iio/adc/ina2xx-adc.c index b027d485398b..2621a34ee5c6 100644 --- a/drivers/iio/adc/ina2xx-adc.c +++ b/drivers/iio/adc/ina2xx-adc.c @@ -764,7 +764,7 @@ static int ina2xx_capture_thread(void *data) struct iio_dev *indio_dev = data; struct ina2xx_chip_info *chip = iio_priv(indio_dev); int sampling_us = SAMPLING_PERIOD(chip); - int buffer_us; + int buffer_us, delay_us; /* * Poll a bit faster than the chip internal Fs, in case @@ -778,8 +778,10 @@ static int ina2xx_capture_thread(void *data) if (buffer_us < 0) return buffer_us; - if (sampling_us > buffer_us) - udelay(sampling_us - buffer_us); + if (sampling_us > buffer_us) { + delay_us = sampling_us - buffer_us; + usleep_range(delay_us, (delay_us * 3) >> 1); + } } while (!kthread_should_stop()); |