diff options
| author | Lars-Peter Clausen <lars@metafoo.de> | 2013-03-01 13:07:00 +0000 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2013-03-02 16:29:14 +0000 |
| commit | f77ae9d8fd4b8ed984f33e996c62f2dfd9f73b37 (patch) | |
| tree | 45f529914fb1397d2dc6fd9b39527741c49209bf /drivers/iio/dac/ad5064.c | |
| parent | c5ef717a774b326a6708e2e14ddf9957b619d5c4 (diff) | |
| download | talos-obmc-linux-f77ae9d8fd4b8ed984f33e996c62f2dfd9f73b37.tar.gz talos-obmc-linux-f77ae9d8fd4b8ed984f33e996c62f2dfd9f73b37.zip | |
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: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/dac/ad5064.c')
| -rw-r--r-- | drivers/iio/dac/ad5064.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/iio/dac/ad5064.c b/drivers/iio/dac/ad5064.c index f724a54bf334..74f2d52795f6 100644 --- a/drivers/iio/dac/ad5064.c +++ b/drivers/iio/dac/ad5064.c @@ -438,6 +438,7 @@ static int 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 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 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; |
