iio: accel: adxl380: fix FIFO watermark bit 8 always written as 0

FIELD_PREP(BIT(0), fifo_samples & BIT(8)) produces either 0 or 256,
and since FIELD_PREP masks to bit 0, 256 & 1 evaluates to 0. Use !!
to convert the result to a proper 0-or-1 value.

Fixes: df36de13677a ("iio: accel: add ADXL380 driver")
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/accel/adxl380.c b/drivers/iio/accel/adxl380.c
index 8fab2fdbe147e263378ae6a2dbb8e1c9d0e95dd8..a51d1d61c4127575e53a26b7a82e5b3c6df2bfb8 100644 (file)
--- a/drivers/iio/accel/adxl380.c
+++ b/drivers/iio/accel/adxl380.c
@@ -877,7 +877,7 @@ static int adxl380_set_fifo_samples(struct adxl380_state *st)
        ret = regmap_update_bits(st->regmap, ADXL380_FIFO_CONFIG_0_REG,
                                 ADXL380_FIFO_SAMPLES_8_MSK,
                                 FIELD_PREP(ADXL380_FIFO_SAMPLES_8_MSK,
-                                           (fifo_samples & BIT(8))));
+                                           !!(fifo_samples & BIT(8))));
        if (ret)
                return ret;