[PATCH] mtd: nand: Fix on-die ecc issues in arasan_nfc driver

[Michal Simek]

From: T Karthik Reddy <t.karthik.reddy at xilinx.com>

Fixed wrong enumeration of nand_config structure. Added chip select
function before reading the nand chip for maf/dev id's, without this
unable to access id's from some of the micron chips. Also added a
print statement to identify if a nand flash is using on-die ecc.

Signed-off-by: T Karthik Reddy <t.karthik.reddy at xilinx.com>
Signed-off-by: Michal Simek <michal.simek at xilinx.com>
---

 drivers/mtd/nand/raw/arasan_nfc.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/mtd/nand/raw/arasan_nfc.c b/drivers/mtd/nand/raw/arasan_nfc.c
index d1b1a4263a2e..110c32b39616 100644
--- a/drivers/mtd/nand/raw/arasan_nfc.c
+++ b/drivers/mtd/nand/raw/arasan_nfc.c
@@ -1120,12 +1120,15 @@ static void arasan_nand_cmd_function(struct mtd_info *mtd, unsigned int command,
 static void arasan_check_ondie(struct mtd_info *mtd)
 {
 	struct nand_chip *nand_chip = mtd_to_nand(mtd);
-	struct nand_config *nand = nand_get_controller_data(nand_chip);
+	struct nand_drv *info = nand_get_controller_data(nand_chip);
+	struct nand_config *nand = &info->config;
 	u8 maf_id, dev_id;
 	u8 get_feature[4];
 	u8 set_feature[4] = {ENABLE_ONDIE_ECC, 0x00, 0x00, 0x00};
 	u32 i;
 
+	nand_chip->select_chip(mtd, 0);
+
 	/* Send the command for reading device ID */
 	nand_chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
 	nand_chip->cmdfunc(mtd, NAND_CMD_READID, 0, -1);
@@ -1150,10 +1153,12 @@ static void arasan_check_ondie(struct mtd_info *mtd)
 		for (i = 0; i < 4; i++)
 			get_feature[i] = nand_chip->read_byte(mtd);
 
-		if (get_feature[0] & ENABLE_ONDIE_ECC)
+		if (get_feature[0] & ENABLE_ONDIE_ECC) {
 			nand->on_die_ecc_enabled = true;
-		else
+			printf("On-DIE ECC Enabled\n");
+		} else {
 			printf("%s: Unable to enable OnDie ECC\n", __func__);
+		}
 
 		/* Use the BBT pattern descriptors */
 		nand_chip->bbt_td = &bbt_main_descr;
-- 
2.25.0