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of: add helper function to retrive match data
It's a common operation for device drivers to retrive the data member from of_device_id struct in their probe function. Most driver end up doing: const struct of_device_id *match; match = of_match_device(driver_of_match, &pdev->dev); driver->data = match->data; With the of_device_get_match_data helper function all this can done in one go. Signed-off-by: Joachim Eastwood <manabian@gmail.com> [robh: add missing inline to dummmy declaration] Signed-off-by: Rob Herring <robh@kernel.org>
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