From 8bcf024f06f11c0c9597ecbbfbe291a9a5092204 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Stefan=20Br=C3=BCns?= Date: Fri, 8 Dec 2017 18:41:49 +0100 Subject: [PATCH] iio: adc: ina2xx: Do not udelay for several seconds MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit The conversion time can be up to 16 seconds (8 ms per channel, 2 channels, 1024 times averaging). Signed-off-by: Stefan Brüns Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/iio/adc/ina2xx-adc.c | 8 +++++--- 1 file 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()); -- 2.20.1