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[0/3] mtd: spi-nor: add support for locking on Macronix nor flashes

Message ID 20200326114257.1782-1-rasmus.villemoes@prevas.dk
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Series mtd: spi-nor: add support for locking on Macronix nor flashes | expand

Message

Rasmus Villemoes March 26, 2020, 11:42 a.m. UTC 
Here's an attempt at implementing locking support for Macronix
flashes. I've tested that it works on the chip used on our boards, and
reading data sheets for various other Macronix chips suggest they
behave in the same way.

I'm still not entirely sure about the best way to hook up these
functions in spi_nor_scan. Also, I'm ignoring the UI/UX issue of
automatically setting a OTP bit without some "force" or "yes, I'm
sure" opt-in - maybe I'm simply overthinking it and it's not a problem
in practice (at least for our use case at hand, we will use bottom
protect, so we can't really shoot ourselves in the foot).


Rasmus Villemoes (3):
  mtd: spi-nor: don't guard stm_*lock* family by preprocessor
    conditionals
  mtd: spi-nor: add support for locking on Macronix nor flashes
  mtd: spi-nor: set SPI_NOR_HAS_LOCK for Macronix mx25l3205d

 drivers/mtd/spi/spi-nor-core.c | 268 ++++++++++++++++++++++++++++-----
 drivers/mtd/spi/spi-nor-ids.c  |   2 +-
 include/linux/mtd/spi-nor.h    |   3 +
 3 files changed, 236 insertions(+), 37 deletions(-)

Comments

Rasmus Villemoes April 21, 2020, 8:23 a.m. UTC | #1 
On 26/03/2020 12.42, Rasmus Villemoes wrote:
> Here's an attempt at implementing locking support for Macronix
> flashes.

ping

Rasmus