Power Management Software Engineer

2 weeks ago

Bengaluru, Karnataka, India SEMI LEAF Full time

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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