iio: imu: fxos8700: fix MAGN sensor scale and unit
commit2acd031347
upstream. +/-1200uT is a MAGN sensor full measurement range. Magnetometer scale is the magnetic sensitivity parameter. It is referenced as 0.1uT according to datasheet and magnetometer channel unit is Gauss in sysfs-bus-iio documentation. Gauss and uTesla unit conversion relationship as follows: 0.1uT = 0.001Gs. Set magnetometer scale and available magnetometer scale as fixed 0.001Gs. Fixes:84e5ddd5c4
("iio: imu: Add support for the FXOS8700 IMU") Signed-off-by: Carlos Song <carlos.song@nxp.com> Link: https://lore.kernel.org/r/20230118074227.1665098-5-carlos.song@nxp.com Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -351,7 +351,7 @@ static int fxos8700_set_scale(struct fxos8700_data *data,
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struct device *dev = regmap_get_device(data->regmap);
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if (t == FXOS8700_MAGN) {
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dev_err(dev, "Magnetometer scale is locked at 1200uT\n");
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dev_err(dev, "Magnetometer scale is locked at 0.001Gs\n");
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return -EINVAL;
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}
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@ -396,7 +396,7 @@ static int fxos8700_get_scale(struct fxos8700_data *data,
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static const int scale_num = ARRAY_SIZE(fxos8700_accel_scale);
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if (t == FXOS8700_MAGN) {
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*uscale = 1200; /* Magnetometer is locked at 1200uT */
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*uscale = 1000; /* Magnetometer is locked at 0.001Gs */
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return 0;
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}
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@ -588,7 +588,7 @@ static IIO_CONST_ATTR(in_accel_sampling_frequency_available,
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static IIO_CONST_ATTR(in_magn_sampling_frequency_available,
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"1.5625 6.25 12.5 50 100 200 400 800");
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static IIO_CONST_ATTR(in_accel_scale_available, "0.000244 0.000488 0.000976");
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static IIO_CONST_ATTR(in_magn_scale_available, "0.000001200");
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static IIO_CONST_ATTR(in_magn_scale_available, "0.001000");
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static struct attribute *fxos8700_attrs[] = {
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&iio_const_attr_in_accel_sampling_frequency_available.dev_attr.attr,
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