diff options
Diffstat (limited to 'drivers/iio/accel/mma8452.c')
| -rw-r--r-- | drivers/iio/accel/mma8452.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c index 17aeea170566..3c12d4966376 100644 --- a/drivers/iio/accel/mma8452.c +++ b/drivers/iio/accel/mma8452.c @@ -111,8 +111,14 @@ static const int mma8452_samp_freq[8][2] = { {6, 250000}, {1, 560000} }; +/* + * Hardware has fullscale of -2G, -4G, -8G corresponding to raw value -2048 + * The userspace interface uses m/s^2 and we declare micro units + * So scale factor is given by: + * g * N * 1000000 / 2048 for N = 2, 4, 8 and g=9.80665 + */ static const int mma8452_scales[3][2] = { - {0, 977}, {0, 1953}, {0, 3906} + {0, 9577}, {0, 19154}, {0, 38307} }; static ssize_t mma8452_show_samp_freq_avail(struct device *dev, @@ -423,9 +429,15 @@ static const struct i2c_device_id mma8452_id[] = { }; MODULE_DEVICE_TABLE(i2c, mma8452_id); +static const struct of_device_id mma8452_dt_ids[] = { + { .compatible = "fsl,mma8452" }, + { } +}; + static struct i2c_driver mma8452_driver = { .driver = { .name = "mma8452", + .of_match_table = of_match_ptr(mma8452_dt_ids), .pm = MMA8452_PM_OPS, }, .probe = mma8452_probe, |