From: Lars-Peter Clausen lars@metafoo.de
commit efd597b2839a9895e8a98fcb0b76d2f545802cd4 upstream.
The power-down mask of the ad5504 is actually a power-up mask. Meaning if a bit is set the corresponding channel is powered up and if it is not set the channel is powered down.
The driver currently has this the wrong way around, resulting in the channel being powered up when requested to be powered down and vice versa.
Fixes: 3bbbf150ffde ("staging:iio:dac:ad5504: Use strtobool for boolean values") Signed-off-by: Lars-Peter Clausen lars@metafoo.de Acked-by: Alexandru Ardelean alexandru.ardelean@analog.com Link: https://lore.kernel.org/r/20201209104649.5794-1-lars@metafoo.de Cc: Stable@vger.kernel.org Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/iio/dac/ad5504.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/iio/dac/ad5504.c +++ b/drivers/iio/dac/ad5504.c @@ -188,9 +188,9 @@ static ssize_t ad5504_write_dac_powerdow return ret;
if (pwr_down) - st->pwr_down_mask |= (1 << chan->channel); - else st->pwr_down_mask &= ~(1 << chan->channel); + else + st->pwr_down_mask |= (1 << chan->channel);
ret = ad5504_spi_write(st, AD5504_ADDR_CTRL, AD5504_DAC_PWRDWN_MODE(st->pwr_down_mode) |