massdrop alt/ctrl: support saving into nvm (#6068)
* support saving into SmartEEPROM
Signed-off-by: Alexandre d Alton <alex@alexdalton.org>
* atsam: update smarteeprom implementation
- Use define for SmartEEPROM buffer address
- Check buffer overflow
- Do not perform operation when timeout occurs
Signed-off-by: Alexandre d'Alton <alex@alexdalton.org>
* return 0 instead of ff for invalid address or timeout
Signed-off-by: Alexandre d'Alton <alex@alexdalton.org>
* clang-format
* Add extra bounds checks
Co-authored-by: zvecr <git@zvecr.com>
90797d903c