mtd: rawnand: mtk: Fix WAITRDY break condition and timeout
authorHauke Mehrtens <hauke@hauke-m.de>
Tue, 9 Mar 2021 00:01:07 +0000 (01:01 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 21 Apr 2021 11:00:50 +0000 (13:00 +0200)
commitb80ea54e1e715223b336d4e794775b7c42218f9a
tree6c2fb563e125917f045703ba44f9f006ae8bcc24
parent5a627026be4a17e5b9db23558cd28e62b2cbc66e
mtd: rawnand: mtk: Fix WAITRDY break condition and timeout

[ Upstream commit 2fb164f0ce95e504e2688b4f984893c29ebd19ab ]

This fixes NAND_OP_WAITRDY_INSTR operation in the driver. Without this
change the driver waits till the system is busy, but we should wait till
the busy flag is cleared. The readl_poll_timeout() function gets a break
condition, not a wait condition.

In addition fix the timeout. The timeout_ms is given in ms, but the
readl_poll_timeout() function takes the timeout in us. Multiple the
given timeout by 1000 to convert it.

Without this change, the driver does not work at all, it doesn't even
identify the NAND chip.

Fixes: 5197360f9e09 ("mtd: rawnand: mtk: Convert the driver to exec_op()")
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210309000107.1368404-1-hauke@hauke-m.de
Signed-off-by: Sasha Levin <sashal@kernel.org>
drivers/mtd/nand/raw/mtk_nand.c