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SubjectRe: [PATCH 2/2] iio: ad7793: Fix the serial interface reset
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On 09/05/2017 02:16 PM, Dragos Bogdan wrote:
> 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: 2edb769d246e ("iio:ad7793: Add support for the ad7798 and ad7799")
> Signed-off-by: Dragos Bogdan <dragos.bogdan@analog.com>

Acked-by: Lars-Peter Clausen <lars@metafoo.de>

> ---
> drivers/iio/adc/ad7793.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/iio/adc/ad7793.c b/drivers/iio/adc/ad7793.c
> index e6706a09e100..47c3d7f32900 100644
> --- a/drivers/iio/adc/ad7793.c
> +++ b/drivers/iio/adc/ad7793.c
> @@ -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 */
>

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