iio: magnetometer: ak8974: Break out measurement

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This breaks out the measurement code to its own function
so we can handle this without swirling it up with the
big switch() statement inside ak8974_read_raw().

Keep a local s16 helper variable for the signed value
coming out of the measurement before assigning it to the
integer *val. The local variable makes the code easier
to read and the compiler will optimize it if possible.

Cc: Nick Reitemeyer <nick.reitemeyer@web.de>
Cc: Stephan Gerhold <stephan@gerhold.net>
Reviewed-by: 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>

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Linus Walleij 2020-04-20 22:40:21 +02:00 • committed by Jonathan Cameron

parent b67959eba4

commit 55ecaf1717

1 changed files with 40 additions and 26 deletions

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drivers/iio/magnetometer/ak8974.c

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