On 04/23/2012 06:51 PM, Lars-Peter Clausen wrote: > Both the powerdown mode bits and the sample value are stored in the same > register, so writing a sample while the device is powered down will clear the > power down bits. To avoid this only update the cached value when the device is > powered down. > > Signed-off-by: Lars-Peter Clausen <lars@xxxxxxxxxx> Acked-by: Jonathan Cameron <jic23@xxxxxxxxxx> > --- > drivers/staging/iio/dac/ad5446.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/staging/iio/dac/ad5446.c b/drivers/staging/iio/dac/ad5446.c > index ec6968b..0cfe445 100644 > --- a/drivers/staging/iio/dac/ad5446.c > +++ b/drivers/staging/iio/dac/ad5446.c > @@ -282,7 +282,8 @@ static int ad5446_write_raw(struct iio_dev *indio_dev, > val <<= chan->scan_type.shift; > mutex_lock(&indio_dev->mlock); > st->cached_val = val; > - st->chip_info->store_sample(st, val); > + if (!st->pwr_down) > + st->chip_info->store_sample(st, val); > ret = spi_sync(st->spi, &st->msg); > mutex_unlock(&indio_dev->mlock); > break; -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
