mtd: nand: davinci: add support for on-die ECC engine type

Some chips, e.g. Micron MT29F1G08ABBFAH4, has a mandatory on-die ECC.
Add "on-die" as ECC engine type in order to be compatible with those.

Signed-off-by: Marcus Folkesson <[email protected]>
Signed-off-by: Miquel Raynal <[email protected]>

Author: marcusfolkesson

drivers/mtd/nand/raw/davinci_nand.c

@@ -66,6 +66,7 @@ struct davinci_nand_pdata {
 
 	/* none  == NAND_ECC_ENGINE_TYPE_NONE (strongly *not* advised!!)
 	 * soft  == NAND_ECC_ENGINE_TYPE_SOFT
+	 * on-die == NAND_ECC_ENGINE_TYPE_ON_DIE
 	 * else  == NAND_ECC_ENGINE_TYPE_ON_HOST, according to ecc_bits
 	 *
 	 * All DaVinci-family chips support 1-bit hardware ECC.
@@ -525,6 +526,8 @@ nand_davinci_get_pdata(struct platform_device *pdev)
 				pdata->engine_type = NAND_ECC_ENGINE_TYPE_SOFT;
 			if (!strncmp("hw", mode, 2))
 				pdata->engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
+			if (!strncmp("on-die", mode, 6))
+				pdata->engine_type = NAND_ECC_ENGINE_TYPE_ON_DIE;
 		}
 		if (!device_property_read_u32(&pdev->dev,
 					      "ti,davinci-ecc-bits", &prop))
@@ -580,6 +583,7 @@ static int davinci_nand_attach_chip(struct nand_chip *chip)
 
 	switch (chip->ecc.engine_type) {
 	case NAND_ECC_ENGINE_TYPE_NONE:
+	case NAND_ECC_ENGINE_TYPE_ON_DIE:
 		pdata->ecc_bits = 0;
 		break;
 	case NAND_ECC_ENGINE_TYPE_SOFT: