staging:iio:dac:ad5791: Use strtobool for boolean values

Use strtobool for parsing the powerdown value instead of strict_strtol, since
the powerdown attribute is a boolean value.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/iio/dac/ad5791.c b/drivers/staging/iio/dac/ad5791.c
index 4e955ed..82b51a7 100644 (file)
--- a/drivers/staging/iio/dac/ad5791.c
+++ b/drivers/staging/iio/dac/ad5791.c
@@ -114,25 +114,23 @@ static ssize_t ad5791_write_dac_powerdown(struct iio_dev *indio_dev,
         uintptr_t private, const struct iio_chan_spec *chan, const char *buf,
         size_t len)
 {
-       long readin;
+       bool pwr_down;
        int ret;
        struct ad5791_state *st = iio_priv(indio_dev);
 
-       ret = strict_strtol(buf, 10, &readin);
+       ret = strtobool(buf, &pwr_down);
        if (ret)
                return ret;
 
-       if (readin == 0) {
-               st->pwr_down = false;
+       if (!pwr_down) {
                st->ctrl &= ~(AD5791_CTRL_OPGND | AD5791_CTRL_DACTRI);
-       } else if (readin == 1) {
-               st->pwr_down = true;
+       } else {
                if (st->pwr_down_mode == AD5791_DAC_PWRDN_6K)
                        st->ctrl |= AD5791_CTRL_OPGND;
                else if (st->pwr_down_mode == AD5791_DAC_PWRDN_3STATE)
                        st->ctrl |= AD5791_CTRL_DACTRI;
-       } else
-               ret = -EINVAL;
+       }
+       st->pwr_down = pwr_down;
 
        ret = ad5791_spi_write(st->spi, AD5791_ADDR_CTRL, st->ctrl);