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Allows querying GPIO direction from the pad config register. If the pad is not in GPIO mode, return an error. Signed-off-by: Javier Arteaga <[email protected]> Reviewed-by: Andy Shevchenko <[email protected]> Acked-by: Mika Westerberg <[email protected]> Signed-off-by: Linus Walleij <[email protected]>