WSL2-Linux-Kernel/drivers/iio/common
Linus Walleij 65e4345c8e iio: accel: st_accel: fix LIS3LV02 reading and scaling
The LIS3LV02 has a special bit that need to be set to get the
read values left aligned. Before this patch we get gibberish
like this:

iio_generic_buffer -a -c10 -n lis3lv02dl_accel
(...)
0.000000 -0.010042 -0.642688 19155832931907
0.000000 -0.010042 -0.642688 19155858751073

Which is because we read a raw value for 1g as 64 which is
the nominal 1024 for 1g shifted 4 bits to the left by being
right-aligned rather than left aligned.

Since all other sensors are left aligned, add some code to
set the special DAS (data alignment setting) bit to 1 so that
the right value is now read like this:

iio_generic_buffer -a -c10 -n lis3lv02dl_accel
(...)
0.000000 -0.147095 -10.120135 24761614364956
-0.029419 -0.176514 -10.120135 24761631624540

The scaling was weird as well: we have a gain of 1000 for 1g
and 3000 for 6g. I don't even remember how I came up with the
old values but they are wrong.

Fixes: 3acddf74f8 ("iio: st-sensors: add support for lis3lv02d accelerometer")
Cc: Lorenzo Bianconi <lorenzo.bianconi@st.com>
Cc: Giuseppe Barba <giuseppe.barba@st.com>
Cc: Denis Ciocca <denis.ciocca@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
2016-12-31 14:35:04 +00:00
..
cros_ec_sensors iio: cros_ec_sensors_core: fix unsigned compared less than zero on status 2016-11-12 14:38:38 +00:00
hid-sensors Merge 4.9-rc5 into staging-next 2016-11-14 08:53:56 +01:00
ms_sensors iio: common: ms_sensors: use tab for indention 2016-04-16 13:39:25 +01:00
ssp_sensors spi: Drop owner assignment from spi_drivers 2015-10-28 10:30:17 +09:00
st_sensors iio: accel: st_accel: fix LIS3LV02 reading and scaling 2016-12-31 14:35:04 +00:00
Kconfig iio: cros_ec_sensors_core: Add common functions for the ChromeOS EC Sensor Hub. 2016-10-25 18:20:05 +01:00
Makefile iio: cros_ec_sensors_core: Add common functions for the ChromeOS EC Sensor Hub. 2016-10-25 18:20:05 +01:00