Read ID (0x90) command does not toggle the R/B# pin. Without this patch, NAND_CMD_READID falls into the default: label, then R/B# is checked by chip->dev_ready().
[masahiro: import Linux commit 3158fa0e739615769cc047d2428f30f4c3b6640e]
Signed-off-by: Masahiro Yamada yamada.masahiro@socionext.com Signed-off-by: Boris Brezillon boris.brezillon@free-electrons.com ---
drivers/mtd/nand/nand_base.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index 3f1b3a7..776c20f 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -651,6 +651,7 @@ static void nand_command(struct mtd_info *mtd, unsigned int command, case NAND_CMD_ERASE2: case NAND_CMD_SEQIN: case NAND_CMD_STATUS: + case NAND_CMD_READID: return;
case NAND_CMD_RESET: @@ -748,6 +749,7 @@ static void nand_command_lp(struct mtd_info *mtd, unsigned int command, case NAND_CMD_SEQIN: case NAND_CMD_RNDIN: case NAND_CMD_STATUS: + case NAND_CMD_READID: return;
case NAND_CMD_RESET: