Added EFR32xG28 device

[shontal1005]

Add hal support for the EFR32xG28 Silicon Labs device

[jhedberg]

@shontal1005 thanks for the PR! However, please follow the same commit message (and PR description) guidelines as for the main tree. Also, please follow the steps documented here to reference this PR from your main tree PR: https://docs.zephyrproject.org/latest/develop/modules.html#process-for-submitting-changes-to-existing-modules

[asmellby]

I'm wondering if it would be better to build upon PR #95 for this, it already adds FG28 and does all the common things for xG28, so extending to ZG28 would be an incremental change. The reason it's not merged yet is that there is no corresponding main tree PR to demonstrate that it doesn't break existing devices.

[janchri]

fyi: I am bit struggeling on enabling the UART shell on the PG23 devKit. For PG28 DevKit everything seems to work fine.

[shontal1005]

For some reason the module.yml isn't getting updated to include the xg28 blobs. Can I get any help with this?

[jhedberg]

For some reason the module.yml isn't getting updated to include the xg28 blobs. Can I get any help with this?

The answer should be somewhere in the scripts/update_simplicity_sdk.py script. It seems to me like it's designed to only update platforms that are already part of module.yml, so perhaps you need to manually create an entry there for xg28 and then run the script to update it once more?

[asmellby]

This PR needs to be rebased now that #95 has been merged.

[jerome-pouiller]

Hello @shontal1005,

This PR has to be reworked in order to be merged:

• boards: silabs: Add support for Silabs EFR32ZG28 SoC zephyr#89597 only add support for zg28. While this PR add support for zg28 and fg28. FG28 has to be removed from this PR.
• Split your commits in an atomic way:
  1. Modification in the scripts
  2. Import the files from simplicity_sdk
• Properly prefix your commits titles (in your case: scripts: and simplicity_sdk:)
• Follow the guidelines for importation of external sources (see also other commits in the history): https://docs.zephyrproject.org/latest/contribute/guidelines.html#identifying-contribution-origin

[asmellby]

Please clean up the git commits, where the first commit changes the import script to add ZG28 (and potentially FG28), and the next commit adds the device files from SiSDK. You will also need to add the efr32xg28 RAIL and BT libraries to module.yml.

[jerome-pouiller]

Commit simplicity_sdk: Add SDK files for the EFR32xG28 modules has to follow:
https://docs.zephyrproject.org/latest/contribute/guidelines.html#identifying-contribution-origin
(see also other commits in this repo)

scripts/import_simplicity_sdk.py has to reference ZG28 files.