diff options
Diffstat (limited to 'drivers/iio/imu/inv_mpu6050')
| -rw-r--r-- | drivers/iio/imu/inv_mpu6050/inv_mpu_core.c | 9 | ||||
| -rw-r--r-- | drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h | 2 | ||||
| -rw-r--r-- | drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c | 15 |
3 files changed, 23 insertions, 3 deletions
diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c index b17f060b52fc..868281b8adb0 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c @@ -114,54 +114,63 @@ static const struct inv_mpu6050_hw hw_info[] = { .name = "MPU6050", .reg = ®_set_6050, .config = &chip_config_6050, + .fifo_size = 1024, }, { .whoami = INV_MPU6500_WHOAMI_VALUE, .name = "MPU6500", .reg = ®_set_6500, .config = &chip_config_6050, + .fifo_size = 512, }, { .whoami = INV_MPU6515_WHOAMI_VALUE, .name = "MPU6515", .reg = ®_set_6500, .config = &chip_config_6050, + .fifo_size = 512, }, { .whoami = INV_MPU6000_WHOAMI_VALUE, .name = "MPU6000", .reg = ®_set_6050, .config = &chip_config_6050, + .fifo_size = 1024, }, { .whoami = INV_MPU9150_WHOAMI_VALUE, .name = "MPU9150", .reg = ®_set_6050, .config = &chip_config_6050, + .fifo_size = 1024, }, { .whoami = INV_MPU9250_WHOAMI_VALUE, .name = "MPU9250", .reg = ®_set_6500, .config = &chip_config_6050, + .fifo_size = 512, }, { .whoami = INV_MPU9255_WHOAMI_VALUE, .name = "MPU9255", .reg = ®_set_6500, .config = &chip_config_6050, + .fifo_size = 512, }, { .whoami = INV_ICM20608_WHOAMI_VALUE, .name = "ICM20608", .reg = ®_set_6500, .config = &chip_config_6050, + .fifo_size = 512, }, { .whoami = INV_ICM20602_WHOAMI_VALUE, .name = "ICM20602", .reg = ®_set_icm20602, .config = &chip_config_6050, + .fifo_size = 1008, }, }; diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h index db1c6904388b..51235677c534 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h @@ -100,12 +100,14 @@ struct inv_mpu6050_chip_config { * @name: name of the chip. * @reg: register map of the chip. * @config: configuration of the chip. + * @fifo_size: size of the FIFO in bytes. */ struct inv_mpu6050_hw { u8 whoami; u8 *name; const struct inv_mpu6050_reg_map *reg; const struct inv_mpu6050_chip_config *config; + size_t fifo_size; }; /* diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c index 5f9a5de0bab4..72d8c5790076 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c @@ -180,9 +180,6 @@ irqreturn_t inv_mpu6050_read_fifo(int irq, void *p) "failed to ack interrupt\n"); goto flush_fifo; } - /* handle fifo overflow by reseting fifo */ - if (int_status & INV_MPU6050_BIT_FIFO_OVERFLOW_INT) - goto flush_fifo; if (!(int_status & INV_MPU6050_BIT_RAW_DATA_RDY_INT)) { dev_warn(regmap_get_device(st->map), "spurious interrupt with status 0x%x\n", int_status); @@ -211,6 +208,18 @@ irqreturn_t inv_mpu6050_read_fifo(int irq, void *p) if (result) goto end_session; fifo_count = get_unaligned_be16(&data[0]); + + /* + * Handle fifo overflow by resetting fifo. + * Reset if there is only 3 data set free remaining to mitigate + * possible delay between reading fifo count and fifo data. + */ + nb = 3 * bytes_per_datum; + if (fifo_count >= st->hw->fifo_size - nb) { + dev_warn(regmap_get_device(st->map), "fifo overflow reset\n"); + goto flush_fifo; + } + /* compute and process all complete datum */ nb = fifo_count / bytes_per_datum; inv_mpu6050_update_period(st, pf->timestamp, nb); |