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[v5,0/3] mtd: cfi_cmdset_0002: Use chip_ready() for write on S29GL064N

Message ID 20220322021001.138206-1-ikegami.t@gmail.com
Headers show
Series mtd: cfi_cmdset_0002: Use chip_ready() for write on S29GL064N | expand

Message

Tokunori Ikegami March 22, 2022, 2:09 a.m. UTC 
Since commit dfeae1073583("mtd: cfi_cmdset_0002: Change write buffer to
check correct value") buffered writes fail on S29GL064N. This is
because, on S29GL064N, reads return 0xFF at the end of DQ polling for
write completion, where as, chip_good() check expects actual data
written to the last location to be returned post DQ polling completion.
Fix is to revert to using chip_good() for S29GL064N which only checks
for DQ lines to settle down to determine write completion.

Fixes: dfeae1073583("mtd: cfi_cmdset_0002: Change write buffer to check correct value")
Signed-off-by: Tokunori Ikegami <ikegami.t@gmail.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/b687c259-6413-26c9-d4c9-b3afa69ea124@pengutronix.de/

Tokunori Ikegami (3):
  mtd: cfi_cmdset_0002: Move and rename
    chip_check/chip_ready/chip_good_for_write
  mtd: cfi_cmdset_0002: Use chip_ready() for write on S29GL064N
  mtd: cfi_cmdset_0002: Add S29GL064N ID definition

 drivers/mtd/chips/cfi_cmdset_0002.c | 112 ++++++++++++++--------------
 include/linux/mtd/cfi.h             |   1 +
 2 files changed, 55 insertions(+), 58 deletions(-)