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Different variants of the ADV7280 chip have up to three register maps. The availability of the CSI and VPP register maps depends on the chip variant. The address of the additional register maps depends on the board design and other chips on the I2C but. They may be programmed via registers in the main register map. Allow to specify the addresses of the VPP and CSI register maps in the device tree to solve I2C address conflicts on a board level. The CSI and VPP register maps are always optional to allow backwards compatibility with existing device trees which may rely on the default address. Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Michael Tretter <m.tretter@pengutronix.de> Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>