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Power Management Software Engineer - SoC / Kernel

Power Management Software Engineer - SoC / Kernel

SEMI LEAFHyderabad
30+ days ago
Job description

Power Management Software Development :

  • Develop and optimize platform-specific power management features on SoCs (based on custom Oryon CPUs).
  • Implement DVFS (Dynamic Voltage and Frequency Scaling), Sleep / Wake logic, and rail / clock gating across CPU, NPU, GPU, and DSP domains.
  • Integrate with Power Management ICs (PMICs) and configure resource power managers (RPMh, RSC).

Low Power Mode Enablement :

  • Enable platform deep sleep, suspend-to-idle, and system sleep states tailored for Always-On (AON) use cases.
  • Validate retention / restore sequences of SoC subsystems and memory during low-power modes.
  • Integrate SPMI-based communication with PMIC for power domain & Performance Scaling :
  • Develop and tune thermal mitigation policies using sensors and thermal zones.
  • Interface with Battery Management System (BMS) and configure thermal trip points.
  • Implement CPUFreq / DevFreq drivers with QoS-aware thermal throttling and performance & Thermal Characterization :
  • Measure and optimize platform power (active and idle) using Trepn Profiler, QDART, QPST, and onboard fuel gauges.
  • Perform power regression analysis across software releases and feature integrations.
  • Work with system architects to define performance-per-watt KPIs for devices (e.g., AI laptops, edge compute and Bootloader Integration :
  • Collaborate with UEFI / TF-A developers to manage early-stage power initialization.
  • Coordinate with XBL, ABL, and UEFI teams for seamless handoff of power states to Linux / Windows OS.

    • Debug & Bring-up Support :

  • Triage system-level power and thermal issues with tools like QXDM, QPST, kernel logs, ftrace, trace32, JTAG.
  • Work with silicon validation teams to debug board-level or SoC-level anomalies in power delivery or heat Collaboration :
  • Partner with PMIC, platform, kernel, BSP, and thermal teams to co-design efficient power solutions.
  • Support OEM / ODM partners in tuning and validating power features for commercial products (e.g., laptops or tablets).
  • Contribute to system-level test plans and validations for power and thermal readiness at EVT / DVT Expertise : Knowledge :
  • Hands-on experience with Resource Power Manager (RPMh), SPMI, TSENS, and CPR (Core Power Reduction) mechanisms.
  • Familiarity with Oryon CPUs, Hexagon DSPs, Adreno GPU, and AI accelerators.
  • Experience with tools : QXDM, QPST, Trepn Profiler, QDART, Dragonboard / CRB and Driver Development :
  • Strong C / C++ development skills for Linux or Windows kernel power / thermal subsystems.
  • Integration of custom PMIC or thermal drivers in AOSP or Yocto-based Profiling & Tuning :
  • Use of Trepn, PowerTOP, ftrace, perf, and RAPL-like interfaces for detailed power / perf analysis.
  • Tuning performance-per-watt metrics across workloads (AI inference, GPU rendering, video playback, and Analysis :
  • Strong log analysis skills (kernel, ADB, QXDM).
  • Familiarity with JTAG / debug probes, boot tracing, and event timelines for power issue Qualifications :
  • Prior experience working on any platforms (reference or commercial).
  • Familiarity with Linux on ARM64 and power management on ARM64 SoCs.
  • Knowledge of modern thermal management techniques for fanless laptops or ultrabooks.
  • Exposure to AI performance-power optimization, e.g., NPU power scaling for LLM workloads.

    • (ref : hirist.tech)

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