From 05968e7cfd5dcc50cfe51d03d119a5e9d77bd07c Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Fri, 3 Oct 2014 20:03:03 +0900 Subject: [PATCH] mtd: denali: fix NAND_CMD_PARAM command NAND_CMD_PARAM (0xEC) command is not working on the Denali NAND controller driver. Unlike NAND_CMD_READID (0x90), when the NAND_CMD_PARAM command is followed by an address cycle, the target device goes busy. (R/B# is deasserted) Wait until the parameter data are ready. In addition, unnecessary clear_interrupts() should be removed. Signed-off-by: Masahiro Yamada Acked-by: Chin Liang See --- drivers/mtd/nand/denali.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/mtd/nand/denali.c b/drivers/mtd/nand/denali.c index ba3de1a635..d9abc7e1d6 100644 --- a/drivers/mtd/nand/denali.c +++ b/drivers/mtd/nand/denali.c @@ -1059,9 +1059,8 @@ static void denali_cmdfunc(struct mtd_info *mtd, unsigned int cmd, int col, addr = MODE_11 | BANK(denali->flash_bank); index_addr(denali, addr | 0, cmd); break; - case NAND_CMD_PARAM: - clear_interrupts(denali); case NAND_CMD_READID: + case NAND_CMD_PARAM: reset_buf(denali); /* sometimes ManufactureId read from register is not right * e.g. some of Micron MT29F32G08QAA MLC NAND chips @@ -1070,6 +1069,8 @@ static void denali_cmdfunc(struct mtd_info *mtd, unsigned int cmd, int col, addr = MODE_11 | BANK(denali->flash_bank); index_addr(denali, addr | 0, cmd); index_addr(denali, addr | 1, col & 0xFF); + if (cmd == NAND_CMD_PARAM) + udelay(50); break; case NAND_CMD_READ0: case NAND_CMD_SEQIN: -- 2.25.1