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device: implement dt_translate_address() properly
Currently this is implemented by calling dt_get_address() which only works when a device is a child of the root node. This patch implements the functionality to work with nested nodes when all parent nodes have an appropriate "ranges" property. This implementation only works for up to 64 bit addresses. Properly supporting larger addressing schemes is a fair amount of (probably pointless) work, so I'm leaving supporting that until we have an actual a need for it. Signed-off-by: Oliver O'Halloran <oohall@gmail.com> Tested-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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