iio: common: st_sensors: fix channel data parsing

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commit 65c8aea07d upstream.

Using realbits as i2c/spi read len, when that value is not byte aligned
(e.g 12 bits), lead to skip msb part of out data registers.
Fix this taking into account scan_type.shift in addition to
scan_type.realbits as read length:

read_len = DIV_ROUND_UP(realbits + shift, 8)

This fix has been tested on 8, 12, 16, 24 bit sensors

Fixes: e7385de529 ("iio:st_sensors: align on storagebits boundaries")
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Lorenzo Bianconi 2016-11-16 22:15:28 +01:00 • committed by Greg Kroah-Hartman

parent 6f2fabab8d

commit cf49219364

2 changed files with 6 additions and 2 deletions

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4

drivers/iio/common/st_sensors/st_sensors_buffer.c

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4

drivers/iio/common/st_sensors/st_sensors_core.c

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