iio: imu: inv_mpu6050: fix frequency setting when chip is off

From: Jean-Baptiste Maneyrol <[email protected]>

Track correctly FIFO state and apply ODR change before starting the chip. Without the fix, you cannot change ODR more than 1 time when data buffering is off.

Fixes 111e1abd0045 ("iio: imu: inv_mpu6050: use the common inv_sensors timestamp module")

Signed-off-by Jean-Baptiste Maneyrol <[email protected]>

---
 drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c | 5 +++++
 1 file changed, 5 insertions(+)

drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c +5 -1

index 676704f9151f..e6e6e94452a3 100644
@@ -111,6 +111,7 @@ int inv_mpu6050_prepare_fifo(struct inv_mpu6050_state *st, bool enable)
 	if (enable) {
 		/* reset timestamping */
 		inv_sensors_timestamp_reset(&st->timestamp);
+		inv_sensors_timestamp_apply_odr(&st->timestamp, 0, 0, 0);
 		/* reset FIFO */
 		d = st->chip_config.user_ctrl | INV_MPU6050_BIT_FIFO_RST;
 		ret = regmap_write(st->map, st->reg->user_ctrl, d);

@@ -184,6 +185,10 @@ static int inv_mpu6050_set_enable(struct iio_dev *indio_dev, bool enable)
 		if (result)
 			goto error_power_off;
 	} else {
+		st->chip_config.gyro_fifo_enable = 0;
+		st->chip_config.accl_fifo_enable = 0;
+		st->chip_config.temp_fifo_enable = 0;
+		st->chip_config.magn_fifo_enable = 0;
 		result = inv_mpu6050_prepare_fifo(st, false);
 		if (result)
 			goto error_power_off;
--

2.34.1