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c869b0f15c
We currently set STM32_FLASH_OPT_LOCKED
to (STM32_FLASH_CR & FLASH_CR_OPTWRE), however the bit is set
when option byte are _unlocked_.
From STM32F0 Reference Manual:
Bit 9 OPTWRE: Option byte write enable
When set, the option byte can be programmed. This bit is set
on writing the correct key sequence to the FLASH_OPTKEYR register.
This bit can be reset by software
BRANCH=none
BUG=chromium:739608
TEST=Flash hammer, flashwp true; reboot; flashinfo
=> hammer does not hang on reboot, RO is protected
Change-Id: I1b6eb5d638534ece90d6d5164586f49bdb0c151d
Reviewed-on: https://chromium-review.googlesource.com/561036
Commit-Ready: Nicolas Boichat <drinkcat@chromium.org>
Tested-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Wei-Ning Huang <wnhuang@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit For instructions on building from source, refer to http://www.chromium.org/chromium-os/ec-development/getting-started-building-ec-images-quickly