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In order to deprecate the ->select_chip hook we need to pass the CS line a NAND operations are targeting. This is done through the addition of a cs field to the nand_operation struct. We also need to keep track of the currently selected target to properly initialize op->cs, hence the ->cur_cs field addition to the nand_chip struct. Note that op->cs is not assigned in nand_exec_op() because we might rework the way we execute NAND operations in the future (adopt a queuing mechanism instead of the serialization we have right now). Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com> Tested-by: Janusz Krzysztofik <jmkrzyszt@gmail.com> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>