April 2026 monthly summary for the phytec/doc-bsp-yocto repository focusing on documentation and release processes.

Month: 2026-03 — phytec/doc-bsp-yocto. This period focused on delivering i.MX91/93 BSP capabilities in the Yocto-based documentation, improving hardware reliability, boot flow, and release readiness. Key features delivered include thermal management enhancements for i.MX91/93, display configuration updates, and a comprehensive documentation refresh and alignment across the BSP. Key features delivered: - Thermal Management Enhancements for i.MX91/93: Implemented temperature shutdown in U-Boot, integrated kernel-level thermal management, and added PWM fan control via device-tree overlays to support proactive cooling. Commits include 64aa5266172500ac765ba5e1dcaf407368760b05. Business impact: reduces thermal throttling risk and improves system reliability in production environments. - Display Configuration Updates for i.MX91/93: Updated display configurations with new overlay configurations to support additional displays and ensure smooth boot with FIT overlays. Commit 8313426d785fc84f13e34e15957973bdfac71f03. Business impact: enables broader hardware compatibility and smoother customer deployments. - Documentation Refresh and Alignment for i.MX91/93 BSP: Comprehensive updates covering release notes, kernel/U-Boot changes, booting with FIT and overlays, JTAG, M-Core firmware, NPU, and wireless network support. Series of commits including 1390db06dadf9afe3d1d5e759d70d56e698f598b, dba44a15aea26020a318db2b6e0ac81ed759097b, 2175a3eb718905cc0379af8232edaf97453c2ee8, 3d96e66fdf808f973808b0d740668c1da85a295a, 75877a95046f5d7d11775e9b0565522cce03c633, 0a2f1ca38d4ef1bead867677ed63d9a563b176b0, 031cf8fa415c9a24f82ef1d2e2ee6cf4b8cc737d, dc411f9fb671e0bee9f6767f0a879413f03c234f, c958e61f44b3a523a7abbfab43ccae6b55e0fe53. Business impact: ensures customers have up-to-date, accurate documentation aligned with current boot flow and hardware support. Major bugs fixed: - Overlay configuration inconsistencies across i.MX91/93 BSP surfaced during integration were addressed to stabilize FIT booting and overlay usage. Affected areas include M-Core, NPU, wireless, and display modules. Representative commits include 64aa5266..., 031cf8fa..., and dc411f9f.... Business impact: reduces field issues due to misconfigured overlays and improves reliability of boot paths for new hardware revisions. - Documentation corrections such as MCU core naming (i.MX93 uses M33, not M7) were fixed to prevent confusion and ensure correct architecture references. Commit c958e61f44b3a523a7abbfab43ccae6b55e0fe53. Business impact: improves accuracy of technical references and developer onboarding. Overall impact and accomplishments: - Accelerated production readiness for i.MX91/93-based platforms through a combination of hardware-side improvements and stronger, clearer documentation. - Reduced onboarding time for customers and internal teams with aligned release notes and consistent boot/configuration guidance. - Demonstrated end-to-end ownership from kernel/U-Boot integration to documentation, with traceable commits for auditability. Technologies and skills demonstrated: - U-Boot and kernel-level thermal management integration; device-tree overlays; FIT booting. - Display overlays and supported hardware configurations for i.MX91/93. - Yocto BSP documentation, release-note management, and cross-functional coordination (JTAG, M-Core, NPU, wireless).

Month: 2025-12 — flipperdevices/u-boot monthly work summary focusing on key accomplishments and business value. Key features delivered: - PhyCORE-i.MX93 Boot Configuration Modernization: switched to standard boot for phyCORE-i.MX93, added necessary boot variables, removed outdated scripts, enabling dynamic boot configurations based on the boot device. Commit references include: 2d964cb7... (board: phytec: phycore-imx93: Switch to standard boot) and 8f4d7492... (board: phytec: phycore-imx93: Set boot_targets dynamically). - NXP UUU flash script environment variables added: introduced emmc_dev and sd_dev environment variables to enable NXP UUU flash scripts for phycore_imx93. Commit reference: 76948dd2... Major bugs fixed: - Restored NXP UUU flash workflow by providing required environment variables (emmc_dev, sd_dev), eliminating flash script failures on phycore-imx93. This reduces manual intervention during flashing and prevents script errors. Overall impact and accomplishments: - Boot configuration now follows standard, reproducible, and hardware-aware defaults, improving reliability across SD/eMMC boot paths and simplifying deployments. - Dynamic boot_targets reduce manual configuration and align boot behavior with the chosen boot medium, while preserving user-defined overrides. - Automation-friendly changes position the project for easier manufacturing flashing and faster onboarding of hardware revisions. Technologies/skills demonstrated: - U-Boot environment management, boot flow customization, and distro-boot alignment (PHYTEC), - Scripted environment variable management and defconfig maintenance (savedefconfig), - Cross-repo coordination for boot workflow improvements and UUU tooling integration. Business value: - Increased deployment speed and repeatability, reduced risk of misconfiguration during boot and flashing, and clearer maintenance pathways for future hardware revisions.

Month: 2025-11. Focused delivery in phytec/doc-bsp-yocto: created Power Button Customization Documentation for the imx9 bb nsm device tree, detailing how to reassign the default ON/OFF button function to enable user customization. The work aligns with customer demand and improves end-user configurability.

October 2025 monthly summary for phytec/doc-bsp-yocto: Focused on documentation improvements that enhance developer clarity and onboarding for BSPs. Key feature delivered this month: renaming the 'Network' chapter to 'Ethernet' across BSP documentation, aligning terminology with the upcoming WLAN/Bluetooth chapter and product roadmap. Commit reference: f791886205e9b0867343e60ae53cc4591a224f0e.

September 2025 focused on delivering hardware integration features, stabilizing power management, and improving developer experience through documentation across three repositories. Key outcomes include: IIO HWMon current sense support and device-tree binding enhancement enabling current-sense readings via iio-hwmon; Wake-on-LAN disabled to save power by removing fsl,magic-packet; TLV320AIC3007 class-D amplifier initialization timing fix to prevent startup failures; runtime PMIC voltage mode detection and debugging for phyCORE-i.MX93 in U-Boot, increasing power-management visibility; Ethernet primary interface fix by setting CONFIG_ETHPRIME to eth0 for phycore-imx93 SoM; documentation restructuring for WLAN/Bluetooth in phytec/doc-bsp-yocto and USB OTG documentation for i.MX93 BSP to improve discoverability and alignment.

August 2025 (Month: 2025-08) focused on stabilizing and modernizing Imx-based boot flow in flipperdevices/u-boot, delivering code cleanup, device-tree consolidation, and configurable hardware interfaces to improve boot reliability and maintenance. Key outcomes include refactoring IMX9/IMX93 code to reuse low_drive_freq_update(), consolidation of imx93-phyboard-segin device-tree entries, and improvements to log verbosity. Delivered hardware stability fixes, configurability enhancements, and PMIC integration with measurable impact on boot stability and hardware support. Overall, the work reduces boot-time failures, simplifies future maintenance, and aligns with downstream distribution expectations, delivering clear business value through improved reliability and faster bring-up for new board variants.

July 2025 monthly summary: Delivered targeted documentation enhancements and essential code maintenance across two repositories. Key outcomes include correcting RPMsg device-tree overlay suffix in the IMX93 BSP docs, adding comprehensive i.MX93 Ethos-U NPU documentation, and performing codebase cleanup in U-Boot for PHYCORE-i.MX93 (removing an unused PMIC define and erasing unused include files), all improving configuration accuracy, enablement, and maintainability.

May 2025 monthly performance summary focused on maintainability, upstream readiness, and documentation traceability across two repositories. Delivered two targeted features that align with PHYTEC's long-term strategy: strengthen documentation consistency and migrate device trees to upstream support, reducing future maintenance and enabling easier kernel integration.

April 2025 monthly summary for developer work focusing on features, bugs, and overall impact across two repositories. 주요 accomplishments include documentation consolidation, robustness improvements in boot processes, and enhanced configurability for kernel boot state.

March 2025 monthly summary for the phytec/doc-bsp-yocto project focused on PD24.2.1 release readiness for the i.MX93 BSP. The effort consolidated release documentation, aligned component versions, and standardized device-tree overlay naming. It also expanded hardware support with a new Nash board overlay for WLAN/BT and updates to bootmode, display, and GPIO documentation. In-scope changes across related BSP components ensured PD24.2.1 compatibility and improved maintainability.

Consolidated the PD24.2.0 i.MX9 BSP release into a single, user-facing feature for the phytec/doc-bsp-yocto project, delivering comprehensive release documentation, hardware overlays, and packaging updates. Work ensured kernel/U-Boot config alignment, image naming/format changes, and Village File System (VFS) notes for LowDrive variants. Expanded per-board documentation (WLAN, PWM fan, UART substitutions, bootmode revisions) and integrated PD24.2.0-specific overlays and changes. Updated image links and rootfs handling to reflect new packaging (including .rootfs and rootfs.wic.xz ending), adjusted URLs after kernel repo move, and added consistency fixes across components (PD version alignment).