iio: dac: ad7303: replace mlock with own lock

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This change replaces indio_dev's mlock with the driver's own lock. The lock
is mostly needed to protect state when changing the `dac_cache` info.
The lock has been extended to `ad7303_read_raw()`, to make sure that the
cache is updated if an SPI-write is already in progress.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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Alexandru Ardelean 2019-10-07 11:26:42 +03:00 • committed by Jonathan Cameron

parent af8dc7bf4e

commit c991bf9b65

1 changed files with 9 additions and 4 deletions

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drivers/iio/dac/ad7303.c

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