Commit 0f65f59e authored by Angelo Dureghello's avatar Angelo Dureghello Committed by Jonathan Cameron
Browse files

iio: adc: ad7606: protect register access 



Protect register (and bus) access from concurrent
read / write. Needed in the backend operating mode.

Signed-off-by: default avatarAngelo Dureghello <adureghello@baylibre.com>
Link: https://patch.msgid.link/20250210-wip-bl-ad7606_add_backend_sw_mode-v4-7-160df18b1da7@baylibre.com


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 79c47485

drivers/iio/adc/ad7606.c

+10 −0
Original line number Diff line number Diff line
@@ -862,7 +862,12 @@ static int ad7606_write_raw(struct iio_dev *indio_dev, 
		}

		val = (val * MICRO) + val2;

		i = find_closest(val, scale_avail_uv, cs->num_scales);



		ret = iio_device_claim_direct_mode(indio_dev);

		if (ret < 0)

			return ret;

		ret = st->write_scale(indio_dev, ch, i + cs->reg_offset);

		iio_device_release_direct_mode(indio_dev);

		if (ret < 0)

			return ret;

		cs->range = i;
@@ -873,7 +878,12 @@ static int ad7606_write_raw(struct iio_dev *indio_dev, 
			return -EINVAL;

		i = find_closest(val, st->oversampling_avail,

				 st->num_os_ratios);



		ret = iio_device_claim_direct_mode(indio_dev);

		if (ret < 0)

			return ret;

		ret = st->write_os(indio_dev, i);

		iio_device_release_direct_mode(indio_dev);

		if (ret < 0)

			return ret;

		st->oversampling = st->oversampling_avail[i];