flipperdevices/u-boot
Dec 2024 – Apr 2025
3 Months active
Languages Used
AssemblyC
Technical Skills
Device DriversEmbedded SystemsLow-level ProgrammingMemory ManagementSoC InitializationDRAM Controller
Jernej Skrabec
PROFILE
Jernej Skrabec
Worked on low-level memory and hardware initialization for the flipperdevices/u-boot repository, focusing on DRAM and eMMC support for Sunxi SoCs. Delivered LPDDR4 DRAM initialization for the A523, refactored MMC reset logic to improve eMMC reliability on H616, and enhanced DRAM size detection algorithms to prevent mis-detection and align with BSP requirements. Led a cross-platform DRAM initialization refactor, introducing const-correctness and modular struct design to enable code sharing between H6 and H616 platforms. Utilized C and Assembly for device driver development, emphasizing maintainability, hardware interaction, and robust memory management across embedded ARM architectures and SoC platforms.
Overall Statistics
Feature vs Bugs
80%Features
Repository Contributions
8Total
Bugs
1
Commits
8
Features
4
Lines of code
2,475
Activity Months3
Your Network
572 peopleShared Repositories
572
Liya HuangMember
Xu ZhangMember
Anurag DuttaMember
Aswath GovindrajuMember
Akashdeep KaurMember
Aniket LimayeMember
Aparna PatraMember
Aashvij ShenaiMember
Alexander DahlMember
Work History
April 2025
4 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for flipperdevices/u-boot: Delivered cross-platform DRAM initialization refactor enabling shared code paths with Sunxi H616. Key changes include const-correct function parameters, splitting the DRAM parameter struct into dram_para and dram_config, and extracting common helpers into shared code to reduce duplication and improve maintainability across H6/H616. In parallel, fixed DRAM size detection on Sunxi H6 by reusing the common DRAM infrastructure and integrating new helper functions into the build, improving initialization reliability. These efforts reduce platform fragmentation, streamline future enhancements, and lay groundwork for broader cross-platform reuse. Technologies demonstrated include C refactoring, const-correctness, modular struct design, and build integration for cross-platform code reuse.
4 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for flipperdevices/u-boot: Delivered cross-platform DRAM initialization refactor enabling shared code paths with Sunxi H616. Key changes include const-correct function parameters, splitting the DRAM parameter struct into dram_para and dram_config, and extracting common helpers into shared code to reduce duplication and improve maintainability across H6/H616. In parallel, fixed DRAM size detection on Sunxi H6 by reusing the common DRAM infrastructure and integrating new helper functions into the build, improving initialization reliability. These efforts reduce platform fragmentation, streamline future enhancements, and lay groundwork for broader cross-platform reuse. Technologies demonstrated include C refactoring, const-correctness, modular struct design, and build integration for cross-platform code reuse.
April 2025
March 2025
3 Commits • 2 Features
Mar 1, 2025In March 2025, delivered critical low-level improvements for Sunxi H616 bring-up in flipperdevices/u-boot, strengthening hardware reliability and operational stability. Implemented a dedicated MMC reset refactor into sunxi_mmc_reset to stabilize eMMC operations on Sunxi platforms, and enhanced DRAM size detection with a more robust algorithm, testing patterns, and address-wrapping checks to prevent mis-detection and ensure BSP alignment.
March 2025
3 Commits • 2 Features
Mar 1, 2025In March 2025, delivered critical low-level improvements for Sunxi H616 bring-up in flipperdevices/u-boot, strengthening hardware reliability and operational stability. Implemented a dedicated MMC reset refactor into sunxi_mmc_reset to stabilize eMMC operations on Sunxi platforms, and enhanced DRAM size detection with a more robust algorithm, testing patterns, and address-wrapping checks to prevent mis-detection and ensure BSP alignment.
December 2024
1 Commits • 1 Features
Dec 1, 2024Monthly summary for 2024-12 focused on delivering low-level memory initialization support for the Sunxi A523 in the U-Boot repository, with responsibilities spanning feature development, code integration, and maintainability improvements.
1 Commits • 1 Features
Dec 1, 2024Monthly summary for 2024-12 focused on delivering low-level memory initialization support for the Sunxi A523 in the U-Boot repository, with responsibilities spanning feature development, code integration, and maintainability improvements.
December 2024
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Quality Metrics
Correctness91.2%
Maintainability90.0%
Architecture90.0%
Performance78.8%
AI Usage20.0%
Skills & Technologies
Programming Languages
AssemblyC
Technical Skills
ARM ArchitectureDRAM ControllerDevice DriversDriver DevelopmentEmbedded SystemsHardware InitializationHardware InteractionLow-level ProgrammingMemory ManagementSoC ArchitectureSoC Initialization
Repositories Contributed To
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