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When the host ECC fails to correct the data error of NAND device, there's a special read for data recovery method which can be setup by the host for the next read. There are several retry levels that can be attempted until the lost data is recovered or definitely assumed lost. This is the port of linux commit f2cb43c98010 (mtd: spinand: Add read retry support) Signed-off-by: Cheng Ming Lin <chengminglin@mxic.com.tw> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Signed-off-by: Mikhail Kshevetskiy <mikhail.kshevetskiy@iopsys.eu> # U-Boot port Reviewed-by: Frieder Schrempf <frieder.schrempf@kontron.de> Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>