diff options
Diffstat (limited to 'drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c')
| -rw-r--r-- | drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c | 26 |
1 files changed, 21 insertions, 5 deletions
diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c index 5f9a5de0bab4..10d16ec5104b 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c @@ -124,7 +124,8 @@ int inv_reset_fifo(struct iio_dev *indio_dev) /* enable interrupt */ if (st->chip_config.accl_fifo_enable || - st->chip_config.gyro_fifo_enable) { + st->chip_config.gyro_fifo_enable || + st->chip_config.magn_fifo_enable) { result = regmap_write(st->map, st->reg->int_enable, INV_MPU6050_BIT_DATA_RDY_EN); if (result) @@ -141,6 +142,8 @@ int inv_reset_fifo(struct iio_dev *indio_dev) d |= INV_MPU6050_BITS_GYRO_OUT; if (st->chip_config.accl_fifo_enable) d |= INV_MPU6050_BIT_ACCEL_OUT; + if (st->chip_config.magn_fifo_enable) + d |= INV_MPU6050_BIT_SLAVE_0; result = regmap_write(st->map, st->reg->fifo_en, d); if (result) goto reset_fifo_fail; @@ -180,9 +183,6 @@ 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); @@ -190,7 +190,8 @@ irqreturn_t inv_mpu6050_read_fifo(int irq, void *p) } if (!(st->chip_config.accl_fifo_enable | - st->chip_config.gyro_fifo_enable)) + st->chip_config.gyro_fifo_enable | + st->chip_config.magn_fifo_enable)) goto end_session; bytes_per_datum = 0; if (st->chip_config.accl_fifo_enable) @@ -202,6 +203,9 @@ irqreturn_t inv_mpu6050_read_fifo(int irq, void *p) if (st->chip_type == INV_ICM20602) bytes_per_datum += INV_ICM20602_BYTES_PER_TEMP_SENSOR; + if (st->chip_config.magn_fifo_enable) + bytes_per_datum += INV_MPU9X50_BYTES_MAGN; + /* * read fifo_count register to know how many bytes are inside the FIFO * right now @@ -211,6 +215,18 @@ 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); |