It is the Exynos equivalent of Qualcomm's EDL mode. It requires specific drivers to communicate with the bootloader when the phone is "dark" or in a test-point state.
. Developers must ensure that the drivers do not consume too many system resources (RAM/CPU overhead), as these devices often have limited memory. Furthermore, as Android versions update, these drivers must be "ported" or updated to remain compatible, which determines the long-term lifespan of the device. Conclusion exynos 3830 driver work
Samsung developers contribute code to the Linux kernel to ensure the basic architecture is supported. HAL (Hardware Abstraction Layer): It is the Exynos equivalent of Qualcomm's EDL mode