Description :

Role : Embedded Software Engineer - Power Management

Experience : 8-15 Years

Location : Bengaluru

Key skills :

- Education : B.E./B.Tech/M.Tech in Electronics, Electrical, or Computer Engineering

- Experience : 4-12 years in embedded Linux / system software development

- Strong understanding of DVFS concepts and implementation

- Hands-on experience with ARM Trusted Firmware (ATF) and secure world power management

- Deep knowledge of the Linux Power Management Framework (CPUFreq, CPUIdle, PM domains, Runtime PM)

- Experience with thermal management frameworks in Linux

- Expertise in power & performance tuning for resource-constrained devices

- BSP bring-up experience with board-level power debugging

- Strong C programming skills; Linux kernel module development experience

- Familiarity with Device Tree configuration for power domains and regulators

Key Responsibilities :

General Power Management :

- Design, develop, and optimize power management subsystems for ARM-based SoCs

- Implement and tune DVFS (Dynamic Voltage and Frequency Scaling) policies for optimal power-performance balance

- Work with ARM Trusted Firmware (ATF) for secure boot and low-power state transitions (suspend/resume, idle states)

- Develop and maintain Linux Power Management Framework components including :

1. CPUIdle / CPUFreq governors

2. Runtime PM

3. System suspend (S2R, S2Idle)

4. Wakeup source management

- Implement thermal management solutions (thermal zones, cooling devices, throttling policies)

- Optimize system power consumption for battery-operated consumer devices

PMIC Driver Development & Integration :

- Develop, port, and maintain Linux PMIC drivers using standard kernel subsystems :

1. Regulator Framework for voltage rail management (LDOs, DC-DC converters)

2. MFD (Multi-Function Device) subsystem for PMICs with multiple sub-devices

3. RTC subsystem for PMIC-integrated real-time clocks

4. Input subsystem for PMIC power button/key events

5. Power Supply class for battery and charger interfaces

- Configure PMIC registers for voltage sequencing, power-on/off sequences, and soft-start timings

- Implement dynamic voltage scaling by interfacing PMIC regulators with CPUFreq/devfreq

- Handle PMIC interrupts for fault detection (over-voltage, under-voltage, over-temperature, over-current)

- Debug and resolve PMIC-related issues such as :

1. Voltage droop during load transients

2. Sequencing failures during suspend/resume cycles

3. I2C/SPI communication errors with PMIC

- Watchdog timer configuration and recovery,Configure low-power modes on PMIC (sleep, standby, hibernate) and coordinate with SoC power states

- Work with PMIC vendors (e.g., TI, Qualcomm, Dialog, Maxim, Rohm) on register maps, errata, and tuning parameters

- Optimize quiescent current (Iq) and standby power consumption through proper PMIC configuration

- Validate PMIC behavior using bench measurements (oscilloscope, multimeter, power analyzer)

BSP & Board-Level Debugging :

- Perform board-level power debugging using oscilloscopes, power analyzers, and JTAG/SWD tools

- Collaborate with hardware teams during BSP bring-up and power rail validation

- Analyze power rail startup sequences and debug boot failures related to PMIC

- Document power architecture, tuning parameters, and debugging procedures

Skill Area Expectation :

- Regulator Framework : In-depth understanding of Linux regulator consumer/provider model, constraints, and coupling

- PMIC Communication : Experience with I2C/SPI-based PMIC register access and debugging

- Voltage Sequencing : Knowledge of power rail dependencies and sequencing requirements

- Low-Power States : Experience configuring PMIC sleep/standby modes and wake sources

- Fault Handling : Ability to implement and debug OVP, UVP, OCP, OTP fault handlers

- PMIC Families : Hands-on experience with PMICs from vendors like TI (TPS series), Qualcomm, Dialog, Maxim Integrated, Rohm, or similar

- Hardware Debugging : Proficiency in using oscilloscopes, logic analyzers, and power monitors for PMIC debugging

Good-to-Have :

- Experience with battery management systems (BMS) and fuel gauge ICs (e.g., TI BQ series)

- Familiarity with battery charging ICs and USB PD/Type-C power negotiation

- Exposure to power profiling tools (Joulescope, Monsoon Power Monitor, etc.)

- Understanding of ARM architecture (Cortex-A/Cortex-M) power states

- Experience with consumer electronics or IoT device development

- Knowledge of PSCI (Power State Coordination Interface)

- Experience with PMIC bring-up on new silicon (pre-silicon/emulation experience is a pluse)