Embedded Linux BSP

Structured notes and case studies for Embedded Linux, Android BSP, and kernel subsystems.

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Overview

This repository contains:

• Structured notes for Linux kernel and subsystems
• BSP bring-up related knowledge
• Android system notes
• Driver examples with trace notes
• Real-world debugging case studies

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Contents

Notes

• Linux subsystem overviews (memory, scheduler, networking, etc.)
• Kernel concepts (interrupts, synchronization, power management)
• BSP topics (boot flow, device tree, interfaces, debug tools)
• Android system components (binder, services, boot flow)
• Firmware notes (TF-A boot flow and runtime)

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Case Studies

cases-study/ contains debugging and analysis records, including:

• Boot and flashing issues
• Peripheral bring-up problems
• Kernel / driver debugging
• System configuration issues

Platforms include:

• Renesas
• Rockchip
• NXP

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Code Examples

code/examples/ contains small kernel and userspace examples:

• Character device
• miscdevice
• mmap
• DMA allocation
• ioctl
• synchronization primitives

Each example includes:

• source code
• Makefile
• trace notes

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Driver Notes

• bcmdhd/ – Broadcom WiFi driver notes
• bluetooth/ – Bluetooth stack and transport notes
• mt76/ – MT76 driver analysis

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Purpose

This repository is used to:

• Organize subsystem knowledge
• Record debugging experience
• Keep trace notes for kernel and drivers

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Author

LC Wang