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Occasionally, it is useful to map supplies from a child device onto the MFD device. A typical usecase for this would be if the MFD device is represented as a single node in device tree. All supplies will be defined in device tree as existing on the MFD device. When a child depends on frameworks which might have no knowledge of MFD to lookup supplies on its behalf the supply will not be found. This patch adds a list of supplies that should be looked up on the parent rather than the child as part of the mfd_cell structure. Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Acked-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Mark Brown <broonie@linaro.org>