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A call to of_iomap does not request the memory region. This patch adds the function of_io_request_and_map which requests the memory region before mapping it. Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com> Suggested-by: Thomas Gleixner <tglx@linutronix.de> Suggested-by: Rob Herring <robh@kernel.org> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>