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Per the BMG160 datasheet (BST-BMG160-DS000-07 Rev. 1.0, May 2013), the start-up and wake-up times (tsu, twusm) are 30 ms. The same file already waits BMG160_MAX_STARTUP_TIME_MS (80 ms) in bmg160_runtime_resume() after the same set_mode(NORMAL) operation. The 500 us value at probe was likely a unit mix-up; the old comment said "500 ms" while the code used microseconds. Reuse the same constant via msleep_interruptible() to match the runtime resume path. Without this, register writes that follow the mode change can hit the chip before it is ready. Fixes: 22b46c45fb9b ("iio:gyro:bmg160 Gyro Sensor driver") Signed-off-by: Stepan Ionichev --- drivers/iio/gyro/bmg160_core.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/iio/gyro/bmg160_core.c b/drivers/iio/gyro/bmg160_core.c index 38394b5f3..44e90af5c 100644 --- a/drivers/iio/gyro/bmg160_core.c +++ b/drivers/iio/gyro/bmg160_core.c @@ -258,8 +258,7 @@ static int bmg160_chip_init(struct bmg160_data *data) if (ret < 0) return ret; - /* Wait upto 500 ms to be ready after changing mode */ - usleep_range(500, 1000); + msleep_interruptible(BMG160_MAX_STARTUP_TIME_MS); /* Set Bandwidth */ ret = bmg160_set_bw(data, BMG160_DEF_BW); -- 2.43.0