megi's PinePhone Development Log RSS


2023–08–02: Update on the Pinephone Pro U-Boot build

NotKamui in Pinephone chat room pointed out that my U-Boot doesn't start correctly from SPI NOR flash.

I was a bit too aggressive configuring the SPI NOR frequency used by U-Boot SPL for loading u-boot.itb, resulting in failures of U-Boot to show GUI on some Pinephone Pro (because SPI access failed due to signal integrity issues).

If you have this issue (my U-Boot build for Pinephone Pro doesn't show GUI when loaded from SPI), you can try the fixed build that's uploaded to my server.