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Commit 7ee3b7eb authored by Dragos Bogdan's avatar Dragos Bogdan Committed by Jonathan Cameron
Browse files

iio: ad7793: Fix the serial interface reset 



The serial interface can be reset by writing 32 consecutive 1s to the device.
'ret' was initialized correctly but its value was overwritten when
ad7793_check_platform_data() was called. Since a dedicated reset function
is present now, it should be used instead.

Fixes: 2edb769d ("iio:ad7793: Add support for the ad7798 and ad7799")
Signed-off-by: default avatarDragos Bogdan <dragos.bogdan@analog.com>
Acked-by: default avatarLars-Peter Clausen <lars@metafoo.de>
Cc: <Stable@vger.kernel.org>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 7fc10de8

drivers/iio/adc/ad7793.c

+2 −2
Original line number Diff line number Diff line
@@ -257,7 +257,7 @@ static int ad7793_setup(struct iio_dev *indio_dev, 
	unsigned int vref_mv)

{

	struct ad7793_state *st = iio_priv(indio_dev);

	int i, ret = -1;

	int i, ret;

	unsigned long long scale_uv;

	u32 id;
@@ -266,7 +266,7 @@ static int ad7793_setup(struct iio_dev *indio_dev, 
		return ret;



	/* reset the serial interface */

	ret = spi_write(st->sd.spi, (u8 *)&ret, sizeof(ret));

	ret = ad_sd_reset(&st->sd, 32);

	if (ret < 0)

		goto out;

	usleep_range(500, 2000); /* Wait for at least 500us */