December 2025 delivered partition-aware MMC raw image loading and boot flow for U-Boot on flipperdevices/u-boot, improving boot reliability and hardware compatibility. Implemented partition-type loading as the primary path for raw-mode MMC images, added dynamic sector handling from SPL, and adjusted configurations to ensure SPL_LOAD_BLOCK is selected when using partition-type raw loading. This resolved boot issues on devices like de0_nano_soc and aligned with ROM loader behavior. In parallel, EFI boot support was introduced for SOC FPGA boards via a hybrid partition table, enabling both bootrom and UEFI paths and broadening OS compatibility. The combined work reduces boot failures, accelerates bring-up across boards, and demonstrates strong cross-functional collaboration.

Month 2025-10: Delivered a targeted patch for flipperdevices/u-boot to stabilize signature verification in Key2dtsi, with a focus on keys that include leading zeros. The change aligns modulus and r-squared lengths with the key length to mirror rsa_add_verify_data() behavior, eliminating verification failures and improving boot security reliability across platforms.

This month (2025-09) focused on enhancing OP-TEE debugging usability and stabilizing unit tests in flipperdevices/u-boot, delivering clearer logs and more reliable CI builds, enabling faster issue isolation and reducing maintenance overhead.

Performance-driven monthly summary for 2025-08: Delivered network boot reliability, improved cross-build stability, hardening of EFI STMM driver for memory safety, and API-level maintainability improvements across two repositories.

In June 2025, the flipperdevices/u-boot repo focused on stabilizing the MMC RPMB subsystem by reverting an earlier change to the RPMB driver's R1 response type and tightening header usage. The revert ensures compatibility with downstream commits and hardware expectations, while directly including the byteorder.h header resolves a previous indirect dependency and guards against build fragility. These changes reduce regression risk in RPMB transactions and improve maintenance reliability across affected boards.