From: Carlos Song Date: Wed, 18 Jan 2023 07:42:27 +0000 (+0800) Subject: iio: imu: fxos8700: fix MAGN sensor scale and unit X-Git-Tag: baikal/aarch64/sdk6.1~63 X-Git-Url: https://git.baikalelectronics.ru/sdk/?a=commitdiff_plain;h=8ef3931d52360c65403471c2e50657c7847feaf6;p=kernel.git iio: imu: fxos8700: fix MAGN sensor scale and unit commit 2acd031347f645871959a799238a7caf6803aa18 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: 2c7e7594a2fd ("iio: imu: Add support for the FXOS8700 IMU") Signed-off-by: Carlos Song Link: https://lore.kernel.org/r/20230118074227.1665098-5-carlos.song@nxp.com Cc: Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/iio/imu/fxos8700_core.c b/drivers/iio/imu/fxos8700_core.c index 880b9bcb80ff4..6d189c4b9ff96 100644 --- a/drivers/iio/imu/fxos8700_core.c +++ b/drivers/iio/imu/fxos8700_core.c @@ -351,7 +351,7 @@ static int fxos8700_set_scale(struct fxos8700_data *data, struct device *dev = regmap_get_device(data->regmap); if (t == FXOS8700_MAGN) { - dev_err(dev, "Magnetometer scale is locked at 1200uT\n"); + dev_err(dev, "Magnetometer scale is locked at 0.001Gs\n"); return -EINVAL; } @@ -396,7 +396,7 @@ static int fxos8700_get_scale(struct fxos8700_data *data, static const int scale_num = ARRAY_SIZE(fxos8700_accel_scale); if (t == FXOS8700_MAGN) { - *uscale = 1200; /* Magnetometer is locked at 1200uT */ + *uscale = 1000; /* Magnetometer is locked at 0.001Gs */ return 0; } @@ -588,7 +588,7 @@ static IIO_CONST_ATTR(in_accel_sampling_frequency_available, static IIO_CONST_ATTR(in_magn_sampling_frequency_available, "1.5625 6.25 12.5 50 100 200 400 800"); static IIO_CONST_ATTR(in_accel_scale_available, "0.000244 0.000488 0.000976"); -static IIO_CONST_ATTR(in_magn_scale_available, "0.000001200"); +static IIO_CONST_ATTR(in_magn_scale_available, "0.001000"); static struct attribute *fxos8700_attrs[] = { &iio_const_attr_in_accel_sampling_frequency_available.dev_attr.attr,