staging: iio: accel: adis16240: enforce SPI mode on probe function

According to the datasheet, this driver supports only SPI mode 3,
so we should enforce it on probe function.
Signed-off-by: Rodrigo Carvalho <rodrigorsdc@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/staging/iio/accel/adis16240.c

@@ -399,6 +399,13 @@ static int adis16240_probe(struct spi_device *spi)
 	indio_dev->num_channels = ARRAY_SIZE(adis16240_channels);
 	indio_dev->modes = INDIO_DIRECT_MODE;
 
+	spi->mode = SPI_MODE_3;
+	ret = spi_setup(spi);
+	if (ret) {
+		dev_err(&spi->dev, "spi_setup failed!\n");
+		return ret;
+	}
+
 	ret = adis_init(st, indio_dev, spi, &adis16240_data);
 	if (ret)
 		return ret;