[resend v2 08/19] drivers: mtd: nand: cadence: Add support for NAND_CMD_RESET

[dinesh . maniyam]

From: Dinesh Maniyam <dinesh.mani...@intel.com>

Support nand reset command for Cadence Nand Driver.

Signed-off-by: Dinesh Maniyam <dinesh.mani...@intel.com>

---
v2:
- remove the "this patch is to" commit phrases
---
---
 drivers/mtd/nand/raw/cadence_nand.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/drivers/mtd/nand/raw/cadence_nand.c 
b/drivers/mtd/nand/raw/cadence_nand.c
index 0775a8a0ce..74926560ad 100644
--- a/drivers/mtd/nand/raw/cadence_nand.c
+++ b/drivers/mtd/nand/raw/cadence_nand.c
@@ -1994,6 +1994,22 @@ static int cadence_nand_param(struct mtd_info *mtd, u8 
offset_in_page, unsigned
        return 0;
 }
 
+static int cadence_nand_reset(struct mtd_info *mtd, unsigned int command)
+{
+       struct nand_chip *chip = mtd_to_nand(mtd);
+       int ret = 0;
+
+       ret = cadence_nand_cmd_opcode(chip, command);
+       if (ret)
+               return ret;
+
+       ret = cadence_nand_waitfunc(mtd, chip);
+       if (ret)
+               return ret;
+
+       return 0;
+}
+
 static void cadence_nand_cmdfunc(struct mtd_info *mtd, unsigned int command,
                                 int offset_in_page, int page)
 {
@@ -2014,6 +2030,10 @@ static void cadence_nand_cmdfunc(struct mtd_info *mtd, 
unsigned int command,
        case NAND_CMD_PARAM:
                ret = cadence_nand_param(mtd, offset_in_page, command);
                break;
+
+       case NAND_CMD_RESET:
+               ret = cadence_nand_reset(mtd, command);
+               break;
        /*
         * ecc will override other command for read, write and erase
         */
@@ -2021,6 +2041,12 @@ static void cadence_nand_cmdfunc(struct mtd_info *mtd, 
unsigned int command,
                break;
        }
 
+       if (cadence->cmd == NAND_CMD_RESET) {
+               ret = cadence_nand_select_target(chip);
+               if (ret)
+                       dev_err(cadence->dev, "Chip select failure after 
reset\n");
+       }
+
        if (ret != 0)
                printf("ERROR:%s:command:0x%x\n", __func__, cadence->cmd);
 }
-- 
2.19.0