This is a note to let you know that I've just added the patch titled iio: imu: fxos8700: fix MAGN sensor scale and unit to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: iio-imu-fxos8700-fix-magn-sensor-scale-and-unit.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 2acd031347f645871959a799238a7caf6803aa18 Mon Sep 17 00:00:00 2001 From: Carlos Song <carlos.song@xxxxxxx> Date: Wed, 18 Jan 2023 15:42:27 +0800 Subject: iio: imu: fxos8700: fix MAGN sensor scale and unit From: Carlos Song <carlos.song@xxxxxxx> 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: 84e5ddd5c46e ("iio: imu: Add support for the FXOS8700 IMU") Signed-off-by: Carlos Song <carlos.song@xxxxxxx> Link: https://lore.kernel.org/r/20230118074227.1665098-5-carlos.song@xxxxxxx Cc: <Stable@xxxxxxxxxxxxxxx> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/iio/imu/fxos8700_core.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- a/drivers/iio/imu/fxos8700_core.c +++ b/drivers/iio/imu/fxos8700_core.c @@ -351,7 +351,7 @@ static int fxos8700_set_scale(struct fxo 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 fxo 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_ 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, Patches currently in stable-queue which might be from carlos.song@xxxxxxx are queue-5.15/iio-imu-fxos8700-fix-map-label-of-channel-type-to-magn-sensor.patch queue-5.15/iio-imu-fxos8700-fix-incomplete-accel-and-magn-channels-readback.patch queue-5.15/iio-imu-fxos8700-fix-failed-initialization-odr-mode-assignment.patch queue-5.15/iio-imu-fxos8700-remove-definition-fxos8700_ctrl_odr_min.patch queue-5.15/iio-imu-fxos8700-fix-imu-data-bits-returned-to-user-space.patch queue-5.15/iio-imu-fxos8700-fix-incorrect-odr-mode-readback.patch queue-5.15/iio-imu-fxos8700-fix-accel-measurement-range-selection.patch queue-5.15/iio-imu-fxos8700-fix-swapped-accel-and-magn-channels-readback.patch queue-5.15/iio-imu-fxos8700-fix-magn-sensor-scale-and-unit.patch