linux/drivers/iio/magnetometer
Linus Walleij b67959eba4 iio: magnetometer: ak8974: Correct realbits
The HSCDTD008A has 15 bits of actual ADC valie, and the
AMI305 and AMI306 has 12 bits.

Correct this by providing an extra parameter to the channel
macro and define a separate set of channels for each variant
of the chip. The resolution is the actual resolution of the
internal ADC of the chip.

The values are stored in a S16 in 2's complement so all 16
bits are used for storing (no shifting needed).

The AMI305, AMI306 and HSCDTD008A valid bits are picked from
respective datasheet.

My best educated guess is that AK8974 is also 12 bits. The
AK8973 is an 8 bit and earlier version, and the sibling
drivers AMI305 and AMI306 are 12 bits, so it makes sense
to assume that the AK8974 is also 12 bits.

Cc: Nick Reitemeyer <nick.reitemeyer@web.de>
Cc: Stephan Gerhold <stephan@gerhold.net>
Cc: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2020-05-03 09:47:22 +01:00
..
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile iio: magnetometer: Add driver support for PNI RM3100 2018-11-16 18:32:31 +00:00
ak8974.c iio: magnetometer: ak8974: Correct realbits 2020-05-03 09:47:22 +01:00
ak8975.c iio: magnetometer: ak8975: Convert to use device_get_match_data() 2020-01-18 11:43:17 +00:00
bmc150_magn.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288 2019-06-05 17:36:37 +02:00
bmc150_magn.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
bmc150_magn_i2c.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288 2019-06-05 17:36:37 +02:00
bmc150_magn_spi.c iio: magn: bmc150: Use vsprintf extension %pe for symbolic error name 2020-04-19 16:56:18 +01:00
hid-sensor-magn-3d.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 335 2019-06-05 17:37:06 +02:00
hmc5843.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
hmc5843_core.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
hmc5843_i2c.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
hmc5843_spi.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mag3110.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 330 2019-06-05 17:37:06 +02:00
mmc35240.c iio:magn:mmc35240: Drop unnecessary casts of val parameter in regmap_bulk* 2020-04-19 16:56:40 +01:00
rm3100-core.c iio: magnetometer: rm3100: Use get_unaligned_be24() 2020-05-03 09:47:20 +01:00
rm3100-i2c.c iio: magnetometer: Add driver support for PNI RM3100 2018-11-16 18:32:31 +00:00
rm3100-spi.c iio: magnetometer: Add driver support for PNI RM3100 2018-11-16 18:32:31 +00:00
rm3100.h iio: magnetometer: Add driver support for PNI RM3100 2018-11-16 18:32:31 +00:00
st_magn.h iio:magn: introduce st_magn_get_settings() function 2019-07-27 22:52:05 +01:00
st_magn_buffer.c iio:st_sensors: remove buffer allocation at each buffer enable 2019-08-11 09:26:04 +01:00
st_magn_core.c iio: st_sensors: Drop unneeded explicit castings 2020-03-21 10:26:21 +00:00
st_magn_i2c.c iio: st_sensors: Make use of device properties 2020-01-13 21:53:39 +00:00
st_magn_spi.c iio: st_sensors: Make use of device properties 2020-01-13 21:53:39 +00:00