Files
OpenCellular/chip/stm32
Gwendal Grignou a35218e204 stm32f4: Add OTP support.
Add support for OTP memory: if needed store serial number in first bank.

BUG=chromium:746471
BRANCH=none
TEST=On sweetberry, check we can write serial number with serialno
command. Check serial number survive a firmware update.

First, check without write protect, check we can write 0s (but not 1s)
serialno
Serial number: NNNNNNNNNNNNNNNNNNNNNN
>
> serial set MMMMMMMMMMMMMMMMMMMMMMMMMMMMM
Saving serial number
Serial number: LLLLLLLLLLLLLLLLLLLLLL

After lock enabled, check we can not overwrite.
> serial set AMMMMMMMMMMMMMMMMMMMMMMMMMMMM
Saving serial number
Serial number: LLLLLLLLLLLLLLLLLLLLLL
Access Denied

Check that serialno returns "Uninitialized" if it was never set.

Change-Id: I9ab08486a7c3e1958e964649640d69b5b70947e3
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/580290
Reviewed-by: Nick Sanders <nsanders@chromium.org>
2017-07-28 17:45:13 -07:00
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