Commit f77ae9d8 authored by Lars-Peter Clausen's avatar Lars-Peter Clausen Committed by Jonathan Cameron
Browse files

iio:ad5064: Initialize register cache correctly 



Initialize the register cache to the proper mid-scale value based on the
resolution of the device.

Signed-off-by: default avatarLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent c5ef717a

drivers/iio/dac/ad5064.c

+8 −5
Original line number Original line Diff line number Diff line
@@ -438,6 +438,7 @@ static int ad5064_probe(struct device *dev, enum ad5064_type type, 
{

{

	struct iio_dev *indio_dev;

	struct iio_dev *indio_dev;

	struct ad5064_state *st;

	struct ad5064_state *st;

	unsigned int midscale;

	unsigned int i;

	unsigned int i;

	int ret;

	int ret;
@@ -474,11 +475,6 @@ static int ad5064_probe(struct device *dev, enum ad5064_type type, 
			goto error_free_reg;

			goto error_free_reg;

	}

	}





	for (i = 0; i < st->chip_info->num_channels; ++i) {

		st->pwr_down_mode[i] = AD5064_LDAC_PWRDN_1K;

		st->dac_cache[i] = 0x8000;

	}



	indio_dev->dev.parent = dev;

	indio_dev->dev.parent = dev;

	indio_dev->name = name;

	indio_dev->name = name;

	indio_dev->info = &ad5064_info;

	indio_dev->info = &ad5064_info;
@@ -486,6 +482,13 @@ static int ad5064_probe(struct device *dev, enum ad5064_type type, 
	indio_dev->channels = st->chip_info->channels;

	indio_dev->channels = st->chip_info->channels;

	indio_dev->num_channels = st->chip_info->num_channels;

	indio_dev->num_channels = st->chip_info->num_channels;





	midscale = (1 << indio_dev->channels[0].scan_type.realbits) /  2;



	for (i = 0; i < st->chip_info->num_channels; ++i) {

		st->pwr_down_mode[i] = AD5064_LDAC_PWRDN_1K;

		st->dac_cache[i] = midscale;

	}



	ret = iio_device_register(indio_dev);

	ret = iio_device_register(indio_dev);

	if (ret)

	if (ret)

		goto error_disable_reg;

		goto error_disable_reg;