Month: 2024-12 focused on strengthening power subsystem reliability in the flipperdevices/u-boot repository. Key feature delivered: TPS65219 regulator driver improvements, including enhanced error diagnostics and readability. Specifically, replaced printf with pr_err for kernel-style logging and introduced descriptive macros to replace magic numbers, aligning the driver with the TPS65219 datasheet and improving maintainability. These changes reduce debugging time during regulator probing and mitigate misdiagnosis risks. Impact: improved boot-time reliability, easier support, and safer future changes to the regulator driver. Major bugs fixed: none reported within this scope; the enhanced logging and macro usage reduce root-cause effort for regulator-related issues. Technologies/skills demonstrated: Linux kernel driver development, power management, C programming, kernel logging conventions (pr_err), macro-based constants, and code readability/maintainability improvements. Business value: lowers mean time to diagnose regulator issues, reduces risk during power-up sequences, and accelerates safe deployments. Commits contributing to this work include: eda65fa42b95bf83363dd07451f760d1213793ac (power: regulator: replace printf() with pr_err()) and 7e261a05a5039ee0c1c106ca17f5775a75912d06 (power: replace magic numbers with macros).