On 8/14/26 8:28 PM, Ralph Siemsen wrote:
Add an option to make use of hardware write protection in the QSPI
controller. This helps prevent flash corruption due to stray writes.
No stray writes have been observed, this is defensive code.
When enabled, the controller is configured to block writes to flash. Due
to known errata [1] the full 32-bit address range is protected, even
though the flash occupies only a portion.
The protection gets temporarily lifted while intentionally writing
to flash, for example using "sf write" command.
[1] https://www.renesas.com/en/document/tcu/qspi-contoller-issue
Signed-off-by: Ralph Siemsen <[email protected]>
Reviewed-by: Marek Vasut <[email protected]>
