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Heiko Stuebner

PROFILE

Heiko Stuebner

Worked across flipperdevices/u-boot, torvalds/linux, linux-riscv/linux, and intel/cve-bin-tool to deliver hardware enablement and stability improvements for Rockchip SoCs and embedded platforms. Developed and fixed device-tree bindings, clock control, and DMA address constraints using C, DTS, and YAML, ensuring correct hardware initialization and compatibility for peripherals like SPI, DDR, and Ethernet. Enhanced PXE boot reliability and expanded RAM support beyond 4GB, while also addressing schema compliance in CycloneDX VEX generation with Python. Prioritized correctness, maintainability, and standards alignment through code reviews, thorough documentation, and targeted bug fixes, supporting robust embedded systems and backend development workflows.

Overall Statistics

Feature vs Bugs

56%Features

Repository Contributions

16Total
Bugs
4
Commits
16
Features
5
Lines of code
1,125
Activity Months5

Your Network

2164 people

Shared Repositories

2164

Work History

June 2026

2 Commits • 1 Features

Jun 1, 2026

June 2026 monthly summary focusing on key accomplishments, major fixes, and business impact across two repositories (flipperdevices/u-boot and intel/cve-bin-tool).

October 2025

1 Commits • 1 Features

Oct 1, 2025

October 2025 monthly summary for linux-riscv/linux: Delivered RK3506 SPI compatibility support in spi-rockchip bindings by updating spi-rockchip.yaml to include rockchip,rk3506-spi, enabling proper recognition and configuration of the RK3506 SPI controller across RK-based boards. The change was implemented in commit 1b824134261d2db08fb6583ccbd05cb71861bd53. This work enhances hardware compatibility, reduces integration risk, and demonstrates kernel DT bindings and SPI subsystem proficiency.

August 2025

1 Commits

Aug 1, 2025

August 2025 monthly summary for torvalds/linux focusing on stability and correctness of device-tree clock bindings for RK3576 MIPI DCPHY. Implemented a critical bug fix correcting a missing clock reference in the RK3576-dcphy syscon bindings, restoring proper clock control and preventing misconfiguration that could cause instability or degraded performance. This work improves hardware compatibility and reliability for RK3576-based deployments, reducing field incidents and support overhead.

April 2025

11 Commits • 3 Features

Apr 1, 2025

April 2025 monthly summary for flipperdevices/u-boot: Key platform work on RK3576 plus a critical fix to PXE boot. Delivered RAM/DDR improvements and device-tree integration for RK3576, OTP configuration support, and broad RK3576 peripheral/board support (SDHCI/MMC, Ethernet, ROC-RK3576-PC). Major bug fix: reintroduced dhcp_run in extlinux_pxe_read_bootflow to restore PXE boot addressing a regression caused by optimization. This work expands hardware compatibility, enables RAM beyond 4GB on RK3576, and strengthens boot reliability and platform readiness. Technologies/skills demonstrated: kernel/bootloader development, DDR/SDR memory mapping, device-tree bindings, OTP configuration, network boot flow debugging, and board support across Rockchip platforms.

November 2024

1 Commits

Nov 1, 2024

Month: 2024-11 — Focused on correctness and stability in the RK3588 clock control code path within the U-Boot repository. Delivered a bug fix to the aclk_vop_root mask, aligning with the Technical Reference Manual to prevent misconfiguration of clock settings. This work reduces boot/runtime risk for RK3588-based devices and improves maintainability of clock-related code.

Activity

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Quality Metrics

Correctness100.0%
Maintainability100.0%
Architecture98.8%
Performance96.2%
AI Usage22.6%

Skills & Technologies

Programming Languages

CDTSYAMLyaml

Technical Skills

ARM ArchitectureBackend DevelopmentBootloader DevelopmentData ValidationDevice DriversDevice TreeDriver DevelopmentEmbedded SystemsEmbedded Systems DevelopmentHardware ConfigurationHardware IntegrationHardware InteractionKernel ConfigurationKernel DevelopmentLinux kernel development

Repositories Contributed To

4 repos

Overview of all repositories you've contributed to across your timeline

flipperdevices/u-boot

Nov 2024 Jun 2026
3 Months active

Languages Used

CDTSyaml

Technical Skills

Device DriversEmbedded SystemsKernel DevelopmentARM ArchitectureBootloader DevelopmentDevice Tree

torvalds/linux

Aug 2025 Aug 2025
1 Month active

Languages Used

YAML

Technical Skills

Linux kernel developmentdevice tree bindingsembedded systems

linux-riscv/linux

Oct 2025 Oct 2025
1 Month active

Languages Used

YAML

Technical Skills

Device TreeEmbedded SystemsKernel Development

intel/cve-bin-tool

Jun 2026 Jun 2026
1 Month active

Languages Used

No languages

Technical Skills

Backend DevelopmentData ValidationPythonSchema Compliance