Linux driver development requires not only mastery of the Linux operating system kernel and driver framework knowledge but also an understanding of low-level ARM processors and interface technology, bootloader Uboot, Linux system porting, and file system deployment. Only by systematically mastering these foundational knowledge areas can one integrate and truly master Linux device driver skills. … Read more
Explanation: 1. The Bootloader handles the initial boot sequence on hardware before the operating system takes over. For example, U-boot is often used as the boot loader in embedded systems before starting embedded operating systems like Linux or FreeBSD. MCUBoot is also a bootloader, but it targets IoT, referring here to systems with limited memory … Read more
This section only records the general trimming method without introducing specific file modifications. Linux Kernel Trimming Steps 1 Modify the ARCH and CROSS_COMPILE environment variables in the makefile ARCH ?= arm CROSS_COMPILE ?= XXX (your cross compiler) 2 Find the configuration file xxxdeconfig in the arch/arm/configs folder, and modify it appropriately. Run the following in … Read more