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

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@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --git a/drivers/mtd/nand/raw/arasan_nfc.c b/drivers/mtd/nand/raw/arasan_nfc.c
index d1b1a4263a2e3fe8b3ce4c7849de65df00d790df..110c32b396167115a3e84ac55a175acd8c89a167 100644 (file)
--- 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;