[PATCH] iio: cros_ec: Fix gyro scale calculation

[Enric Balletbo i Serra]

From: Gwendal Grignou <gwendal@xxxxxxxxxxxx>

Calculation was copied from IIO_DEGREE_TO_RAD, but offset added to avoid
rounding error is wrong. It should be only half of the divider.

Fixes: c14dca07a31d ("iio: cros_ec_sensors: add ChromeOS EC Contiguous Sensors driver")
Signed-off-by: Gwendal Grignou <gwendal@xxxxxxxxxxxx>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx>
---

 drivers/iio/common/cros_ec_sensors/cros_ec_sensors.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors.c b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors.c
index 89cb0066a6e0..600942af9f9c 100644
--- a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors.c
+++ b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors.c
@@ -103,7 +103,7 @@ static int cros_ec_sensors_read(struct iio_dev *indio_dev,
 			 * Do not use IIO_DEGREE_TO_RAD to avoid precision
 			 * loss. Round to the nearest integer.
 			 */
-			*val = div_s64(val64 * 314159 + 9000000ULL, 1000);
+			*val = div_s64(val64 * 314159 + 500ULL, 1000);
 			*val2 = 18000 << (CROS_EC_SENSOR_BITS - 1);
 			ret = IIO_VAL_FRACTIONAL;
 			break;
-- 
2.20.1