BDN9 keymap

[lickel]

Description

This is a BDN9 keymap that toggles between two core layers. It has VIA enabled by default.

I have included a trivial rgb_matrix_reload_from_eeprom() implementation drawing heavily from the equivalent rgblight_reload_from_eeprom().

Types of Changes

• Core
• Bugfix
• New feature
• Enhancement/optimization
• Keyboard (addition or update)
• Keymap/layout/userspace (addition or update)
• Documentation

Checklist

• My code follows the code style of this project: C, Python
• I have read the PR Checklist document and have made the appropriate changes.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• I have tested the changes and verified that they work and don't break anything (as well as I can manage).

[lickel]

Please let me know if I need to extract out rgb_matrix_reload_from_eeprom() into a separate PR

[daskygit]

Please let me know if I need to extract out rgb_matrix_reload_from_eeprom() into a separate PR

Yes it will definitely need pulling out into a separate PR. It will also need to target develop as with any core change.