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

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commit daec424cc5 upstream.

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. This restriction on a single pending ODR
change should only apply when the FIFO is on.

Fixes: 111e1abd00 ("iio: imu: inv_mpu6050: use the common inv_sensors timestamp module")
Cc: stable@vger.kernel.org
Signed-off-by: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@tdk.com>
Link: https://lore.kernel.org/r/20240219154741.90601-1-inv.git-commit@tdk.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jean-Baptiste Maneyrol 2024-02-19 15:47:41 +00:00 committed by Greg Kroah-Hartman
parent d017ec50fa
commit 3df5e345d6
1 changed files with 5 additions and 0 deletions
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5
drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c
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@ -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;