odroidn2: u-boot: bump to v2026.04-rc3; make fancy, incl LWIP

[rpardini]

• 🌱 fancy: EFI debug, compression, LED, networking with LWIP
• 🍀 Kwiboo has worked his magic on LWIP in 2026.04
• 🌴 Use flashcp to write to SPI (mine needed a few times, as my flash is old and failing)
• 🌿 Move FIP handling from family to board file, but still the same
• 🌳 flash blue led in preboot once
• 🍃 adapt 24Mhz mmc patch

[coderabbitai]

Important

Review skipped

Auto reviews are limited based on label configuration.

🏷️ Required labels (at least one) (1)

• Needs review

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: 24fddc56-0ae3-4d57-b212-dcafed66934a

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[iav]

Will test with boot from sdcard be enough?

[EvilOlaf]

I could test with emmc too if I find time...and the emmc module lol

[rpardini]

I've tested with u-boot on eMMC and SPI, booting from eMMC and SD card.
my n2+ has the blown-USB-regulator thing that seems very common so I can't test USB booting, but it should work.
btw, my SPI flash after a few years is simply failing -- took many tries to get it to erase/write correctly: while ! flashcp --verbose --partition /usr/lib/linux-u-boot-edge-odroidn2/u-boot-spi.bin /dev/mtd0 ; do echo retry; done; echo done

[rpardini]

Will test with boot from sdcard be enough?

Yes, if you move the boot switch to eMMC, and boot without eMMC, I think it should load blobs and u-boot from SD card.

[github-actions]

✅ This PR has been reviewed and approved — all set for merge!