On 03/01/2013 01:07 PM, Lars-Peter Clausen wrote:
> Initialize the register cache to the proper mid-scale value based on the
> resolution of the device.
>
> Signed-off-by: Lars-Peter Clausen <lars@xxxxxxxxxx>
applied to togreg branch of iio.git
Thanks
> ---
> drivers/iio/dac/ad5064.c | 13 ++++++++-----
> 1 file changed, 8 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/iio/dac/ad5064.c b/drivers/iio/dac/ad5064.c
> index a491976..0c8d03a 100644
> --- a/drivers/iio/dac/ad5064.c
> +++ b/drivers/iio/dac/ad5064.c
> @@ -438,6 +438,7 @@ static int __devinit ad5064_probe(struct device *dev, enum ad5064_type type,
> {
> struct iio_dev *indio_dev;
> struct ad5064_state *st;
> + unsigned int midscale;
> unsigned int i;
> int ret;
>
> @@ -474,11 +475,6 @@ static int __devinit ad5064_probe(struct device *dev, enum ad5064_type type,
> 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->name = name;
> indio_dev->info = &ad5064_info;
> @@ -486,6 +482,13 @@ static int __devinit ad5064_probe(struct device *dev, enum ad5064_type type,
> indio_dev->channels = st->chip_info->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);
> if (ret)
> goto error_disable_reg;
>
--
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