PASUNUTI RAMU
Bengaluru
Summary
Senior systems engineer with 5 years of experience in embedded Linux, Linux BSP development, and Yocto-based systems on Qualcomm platforms. Specialized in board bring-up, Linux kernel device driver integration, Device Tree customization, kernel debugging, and Secure Boot integration. Proven track record in resolving complex kernel-level issues, optimizing system performance, and collaborating with cross-functional teams. Experienced in delivering reliable embedded solutions through successful hardware bring-up, validation, and system integration.
Overview
5
5
years of professional experience
Work History
Senior Systems Engineer
Cavalier Wireless Private Limited
11.2024 - Current
- Developed and customized Linux BSP for Qualcomm MDM9607 platforms, including board bring-up, hardware validation, and peripheral integration.
- Integrated and debugged Linux kernel device drivers for LCD, audio codec, RTC, eMMC, SD Card, CAN controller, battery fuel gauge, ambient light sensor, and SPI NAND.
- Integrated and brought up Qualcomm QCA9377-3 Wi-Fi and Bluetooth, including Wi-Fi hotspot functionality, with end-to-end hardware validation.
- Validated modem functionality using AT commands for SIM management, GNSS/GPS, RF configuration, network registration, and OTA/FOTA operations.
- Developed and modified Device Tree (DTS/DTSI), Kconfig, and Defconfig for hardware and feature enablement.
- Built and customized Yocto Linux images and SDKs, including recipe development, layer customization, and application integration.
- Integrated and validated Linux utilities and services, including OpenSSL, iptables, MQTT, SSH/SCP/SFTP, FTP, cURL, i2c-tools, ALSA, lighttpd, cron, and NTP, based on customer requirements.
- Developed and integrated boot-time applications using Yocto and SysV Init (init.d); created startup scripts and Yocto recipes for automatic application execution.
- Performed Linux kernel boot-up analysis, driver debugging, root-cause analysis, and issue resolution using embedded Linux debugging tools.
- Integrated and validated Secure Boot, ARM TrustZone, and Cavli OTA/FOTA using Cavli APIs and AT commands.
- Configured MPM GPIOs through Device Tree and implemented GPIO-based wake-up for touch, Bluetooth, and lock/unlock events, including interrupt and suspend/resume validation.
- Performed firmware flashing and software release validation using QFIL, ADB, and Fastboot.
- Analyzed and resolved customer-reported issues through JIRA, performing root-cause analysis and implementing software fixes.
- Collaborated with firmware, hardware, QA, and customer engineering teams to resolve integration issues and ensure successful software releases.
- Participated in customer technical meetings, discussed defect status, and provided timely technical updates and resolutions for field-reported issues.
Embedded Developer
US TECHNOLOGY INTERNATIONAL PRIVATE LIMITED
10.2021 - 11.2024
Client: Bosch Global Software Technologies (BGSW)
- Executed unit testing for embedded software modules in a Linux environment using the Google Test framework to validate functionality and performance.
- Developed clear and maintainable test cases in Embedded C++ using the Google Test framework, ensuring comprehensive software validation.
- Created and executed test plans and test cases to improve software quality, reliability, and functional coverage.
- Tested and debugged applications using Visual Studio 2019 and Visual Studio Code, identifying and resolving software defects.
- Participated in code reviews and test reviews, ensuring compliance with SDLC processes and software quality standards.
Education
B.Tech - Electrical and Electronics Engineering
TKR COLLEGE OF ENGINEERING AND TECHNOLOGY
HYDERABAD09-2018
Skills
- Programming: C, Embedded C, Data Structures
- Operating Systems: Embedded Linux, FreeRTOS
- IPC & Synchronization: IPC, Shared Memory, Message Queues, Semaphores, Mutexes
- Build Systems: Yocto Project, BitBake, Recipe Development, Layer Creation, Image Customization, SDK Generation
- Linux BSP: Board Bring-up, Device Tree (DTS/DTSI), Linux Kernel, Kernel Debugging, Device Driver Development
- Compilers: ARM GCC Cross Compiler (arm-none-linux-gnueabi, arm-linux-gnueabihf)
- Interfaces: I2C, SPI, UART
- Debugging Tools: dmesg, GDB, logcat, i2cdetect, i2cget, i2cset, spidev_test
- Flashing Tools: QFIL, ADB, Fastboot
- Security: Secure Boot, ARM TrustZone, OTA
- Hardware: Schematic Reading, Datasheet Analysis, Hardware Debugging, Hardware Validation
- Connectivity & IoT: Wi-Fi, Bluetooth, GNSS/GPS, MQTT
- Version Control & Tools: Git, Docker, Bitbucket, Jenkins, JIRA, VS Code, Minicom, Tera Term
Timeline
Senior Systems Engineer
Cavalier Wireless Private Limited
11.2024 - Current
Embedded Developer
US TECHNOLOGY INTERNATIONAL PRIVATE LIMITED
10.2021 - 11.2024
B.Tech - Electrical and Electronics Engineering
TKR COLLEGE OF ENGINEERING AND TECHNOLOGY
Professional Projects
ST77922 LCD Panel Bring-Up & QPIC Display Driver
Client: JMO
Platform: Qualcomm MDM9607 | Yocto SDK
- Integrated ST77922 LCD with the Linux QPIC display driver using an 8080 8-bit parallel interface.
- Developed panel initialization, power sequencing, and display update pipeline.
- Refactored the QPIC driver and optimized BAM DMA transfers for display data.
- Configured Device Tree, kernel, and Yocto BSP; validated using QFIL, ADB, and Tera Term.
Client: MicroProgram
Platform: Qualcomm MDM9607 | Yocto SDK
- Integrated the WM8940 audio codec using the ALSA ASoC framework, with Secondary MI2S for playback/capture and I²C for codec control.
- Enhanced the ASoC machine and codec drivers to support MI2S audio routing and codec initialization.
- Configured Device Tree and BSP for I²C, MI2S, GPIO, regulators, and audio routing.
- Validated audio playback, capture, and routing using Embedded Linux/ALSA utilities.
Client: Intellicar
Platform: Qualcomm MDM9607 | Yocto SDK
- Integrated Winbond SPI NAND using the Linux MTD subsystem.
- Extended the SPI NAND driver and configured flash partitions with ECC support.
- Enabled kernel support and validated storage functionality.
Client: MicroProgram
Platform: Qualcomm MDM9607 | Yocto SDK
- Integrated RX8130CE RTC with the Linux RTC subsystem over I2C.
- Added kernel support, updated Kconfig/Makefile, and configured Device Tree.
- Validated RTC communication and time synchronization.
Client: MicroProgram
Platform: Qualcomm MDM9607 | Yocto SDK
- Integrated BQ27750 battery fuel gauge over I2C.
- Configured device tree and kernel support for battery monitoring.
- Validated SOC, voltage, current, and capacity reporting.
Client: Hero
Platform: Qualcomm MDM9607 | Yocto SDK
- Enabled the SDHC2 controller and configured the MMC subsystem.
- Implemented device tree, GPIO, regulator, and clock configuration.
- Validated SD card detection and read/write operations.
Client: MicroProgram
Platform: Qualcomm MDM9607 | Yocto SDK
- Enhanced the SDHCI-MSM driver for eMMC support.
- Implemented power sequencing and MMC host configuration.
- Validated eMMC initialization and storage performance.
Client: JMO
Platform: Qualcomm MDM9607 | Yocto SDK
- Developed a Linux IIO driver using the I2C/regmap framework.
- Implemented sensor initialization, lux conversion, and sysfs interfaces.
- Added Device Tree support and validated sensor functionality.
Platform: AM3358
- Configured U-Boot, Yocto BSP, and Device Tree for MPU6050 integration.
- Implemented I2C communication and developed a user-space test application.
- Validated sensor data acquisition on hardware.
Client: BGSW
- Reviewed software requirements using DOORS.
- Developed and executed GTest-based validation and regression tests.
- Performed debugging, defect tracking, and test reporting in IBM RQM.