From 10c7a314c9fde2342407c1bd2d71d0c0f7ff9662 Mon Sep 17 00:00:00 2001 From: Eugen Hristev Date: Wed, 15 Nov 2017 14:56:48 +0200 Subject: iio: adc: at91-sama5d2_adc: ack DRDY irq in direct mode Need to acknowledge DRDY irq in direct mode/ software triggered mode. Otherwise, on the next conversion, overrun flag will be raised, which is not a correct state. This doesn't affect the functionality, but will generate possible incorrect overrun reports. Signed-off-by: Eugen Hristev Signed-off-by: Jonathan Cameron --- drivers/iio/adc/at91-sama5d2_adc.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers') diff --git a/drivers/iio/adc/at91-sama5d2_adc.c b/drivers/iio/adc/at91-sama5d2_adc.c index 99f3c2c89768..4eff8351ce29 100644 --- a/drivers/iio/adc/at91-sama5d2_adc.c +++ b/drivers/iio/adc/at91-sama5d2_adc.c @@ -786,6 +786,9 @@ static int at91_adc_read_raw(struct iio_dev *indio_dev, at91_adc_writel(st, AT91_SAMA5D2_IDR, BIT(chan->channel)); at91_adc_writel(st, AT91_SAMA5D2_CHDR, BIT(chan->channel)); + /* Needed to ACK the DRDY interruption */ + at91_adc_readl(st, AT91_SAMA5D2_LCDR); + mutex_unlock(&st->lock); iio_device_release_direct_mode(indio_dev); -- cgit v1.2.3