Feb 2023 – Apr 2024 · 1 yr 2 mos

• Upstreamed the Linux kernel and U-Boot bootloader complete support for TI K3 J784S4 SoC.
• Developed inter-processor communication support for TI K3 SoCs, based on remoteproc, rpmsg, virtio and mailbox Linux frameworks.
• Implemented the support for OSPI NAND flash boot with UBIFS along with the test infrastructure support, across all TI K3 SoCs, both Jacinto and Sitara family.
• Implemented thermal mitigation using Dynamic Frequency Scaling of ARM cores, to provide a cooling effect in event of CPU overheating
• Conceptualized and developed a utility from scratch that eliminated the efforts put by the developers in writing unit tests, by providing a swift setup and an optimized & automated test development flow environment.
• Link to contributions:
• https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/log/?qt=author&q=Apurva+Nandan
• https://source.denx.de/u-boot/u-boot/-/commits/master?search=Apurva+Nandan
• https://git.ti.com/cgit/ti-linux-kernel/ti-linux-kernel/log/?h=ti-linux-6.1.y&qt=author&q=Apurva+Nandan
• https://git.ti.com/cgit/ti-u-boot/ti-u-boot/log/?h=ti-u-boot-2023.04&qt=author&q=Apurva+Nandan

Aug 2021 – Apr 2024 · 2 yrs 8 mos

• Developed Linux and bootloader support for Jacinto family of TI ARM based SoCs focused towards Automotive customers.
• Lead the pre-sillicon and post-silicon software development for TI K3 J784S4 SoC
• Pre-silicon software development involved bringing up SPL, firmwares & Linux kernel, to boot up on all 8 ARM Cortex-A72 cores & 4 DDR instances, on a FPGA based design implementation of J784S4 SoC
• Post-silicon software development involved bringup, testing and customer release of Linux SDK with complete IP support within a period of 2 weeks from the actual silicon chip generation
• Implemented Linux kernel driver for new Sony IMX390 camera sensor for TI K3 SoCs using V4L2 and media frameworks

May 2021 – Jul 2021 · 2 mos

• Implemented Octal DDR SPI protocol support in Linux MTD subsystem for NAND flashes, boosting flash read & write performance by 900%
• Added support for runtime auto-suspending/resuming of SPI Flash controller using Linux runtime_pm framework for reducing power consumption in idle period

Jun 2020 – Aug 2020 · 2 mos

• Developed a web-hosted automated regression and performance
• benchmark suite for kernel and userland libraries of NetBSD-current.
• Performed software maintenance of pkgsrc by upstreaming patches
• for new package imports, upgrades and bug fixes, and patched
• NetBSD source for improving the compatibility with the packages.
• https://summerofcode.withgoogle.com/projects/#4645452886048768

Aug 2019 – Mar 2020 · 7 mos · India

• • Designed and validated AXI IPs for CRC24, QPSK modulator and demodulator in high & low-PHY layer (L1) of Physical Downlink Control Channel (PDCCH) of the 5G NR baseband unit on Xilinx Zynq RFSoC.

May 2019 – Aug 2019 · 3 mos · India

• Developed the firmware in VHDL for USB 3.0 plugin module of the AXIOM Beta, an open hardware camera, to provide a raw 4K resolution video throughput of 20+ FPS.
• Designed PHY layer for high-speed data transfer between Zynq SoC and Lattice FPGA using SerDes on 6 LVDS lanes with 8b/10b encoding scheme, and achieved 3.0 Gbps bandwidth with BER < 10^−14.
• https://summerofcode.withgoogle.com/archive/2019/projects/5710711492182016