iio: mcp9600: switch to using FIELD_GET_SIGNED()

Switch from sign_extend32(FIELD_GET()) to the dedicated
FIELD_GET_SIGNED() and don't calculate the fields length explicitly.

Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Yury Norov <ynorov@nvidia.com>

diff --git a/drivers/iio/temperature/mcp9600.c b/drivers/iio/temperature/mcp9600.c
index aa42c2b1a369edbd36e0d6d6d1738ed0069fd990..69baf654c9c0af6f336ac0ecb3c20f435fe8c14b 100644 (file)
--- a/drivers/iio/temperature/mcp9600.c
+++ b/drivers/iio/temperature/mcp9600.c
@@ -297,7 +297,7 @@ static int mcp9600_read_thresh(struct iio_dev *indio_dev,
                 * Temperature is stored in two’s complement format in
                 * bits(15:2), LSB is 0.25 degree celsius.
                 */
-               *val = sign_extend32(FIELD_GET(MCP9600_ALERT_LIMIT_MASK, ret), 13);
+               *val = FIELD_GET_SIGNED(MCP9600_ALERT_LIMIT_MASK, ret);
                *val2 = 4;
                return IIO_VAL_FRACTIONAL;
        case IIO_EV_INFO_HYSTERESIS: