[PATCH 2/2] iio: adc: ad7380: don't use bool in FIELD_PREP

[David Lechner]

Although this technically works, it is better to avoid using bool as
a bit value.

Fixes sparse warning:

     drivers/iio/adc/ad7380.c:353:34: sparse: sparse: dubious: x & !y

Reported-by: kernel test robot <lkp@xxxxxxxxx>
Closes: https://lore.kernel.org/oe-kbuild-all/202401280629.5kknB57C-lkp@xxxxxxxxx/
Signed-off-by: David Lechner <dlechner@xxxxxxxxxxxx>
---
 drivers/iio/adc/ad7380.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/adc/ad7380.c b/drivers/iio/adc/ad7380.c
index 44b8b18ab213..a4aa0db47720 100644
--- a/drivers/iio/adc/ad7380.c
+++ b/drivers/iio/adc/ad7380.c
@@ -350,7 +350,8 @@ static int ad7380_init(struct ad7380_state *st)
 	/* select internal or external reference voltage */
 	ret = regmap_update_bits(st->regmap, AD7380_REG_ADDR_CONFIG1,
 				 AD7380_CONFIG1_REFSEL,
-				 FIELD_PREP(AD7380_CONFIG1_REFSEL, !!st->vref));
+				 FIELD_PREP(AD7380_CONFIG1_REFSEL,
+					    st->vref : 1 : 0));
 	if (ret < 0)
 		return ret;
 
-- 
2.43.0