From: Dinesh Maniyam <[email protected]> The patch is to support nand reset command for Cadence Nand Driver.
Signed-off-by: Dinesh Maniyam <[email protected]> --- drivers/mtd/nand/raw/cadence_nand.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/drivers/mtd/nand/raw/cadence_nand.c b/drivers/mtd/nand/raw/cadence_nand.c index 1b5cda1955..1b1335af68 100644 --- a/drivers/mtd/nand/raw/cadence_nand.c +++ b/drivers/mtd/nand/raw/cadence_nand.c @@ -1965,10 +1965,28 @@ 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 cadence_nand_info *cadence = mtd_to_cadence(mtd); + struct nand_chip *chip = mtd_to_nand(mtd); + int ret = 0; + + ret = cadence_nand_cmd_opcode(cadence, 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) { struct cadence_nand_info *cadence = mtd_to_cadence(mtd); + struct nand_chip *chip = mtd_to_nand(mtd); int ret = 0; cadence->cmd = command; @@ -1984,6 +2002,10 @@ 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 */ @@ -1991,6 +2013,12 @@ static void cadence_nand_cmdfunc(struct mtd_info *mtd, unsigned int command, break; } + if (cadence->cmd == NAND_CMD_RESET) { + ret = cadence_nand_select_target(cadence, 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); } -- 2.26.2
