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=== Adding a new device
A good all-round advice would be to start by looking at recent commits about adding a new device, to see what files where changed and how.
Many files try to be as self-explanatory as possible, most of the times just opening them will be enough to understand their function.
This is a general map of where most important files are located:
==== /target/linux/<arch_name>/base-files/etc/...
This folder contains files and folders that will be integrated in the firmware's /etc folder.
These are its subfolders and files:
* **...board.d/** scripts for defining device-specific default hardware, like leds and network interfaces.
* **...hotplug.d/** scripts for defining device-specific actions to be done automatically on hotplugging of devices
* **...init.d/** scripts for defining device-specific actions to be done automatically on boot
* **...uci-defaults/** files for defining device-specific uci configuration defualts
* **...diag.sh** defines what is the led to use for error codes for each board
=== /target/linux/<arch_name>/base-files/lib/...
This folder contains files and folders that will be integrated in the firmware's /lib folder.
These are its subfolders and files:
* **...<arch_name>.sh** human-readable full board name associated to script-safe board name
* **...preinit/** common <arch_name> preinit startup scripts
* **...upgrade/** common <arch_name> upgrade scripts
=== /target/linux/<arch_name>/base-files/sbin
This folder contains files and folders that will be integrated in the firmware's /sbin folder, usually common <arch_name> sbin scripts and tools.
==== /target/linux/<arch_name>/dts/
Device tree source files, or dts for short.
=== /target/linux/<arch_name>/image/
Configuration needed to build device-specific flashable images.
=== /target/linux/<arch_name>/<board_name>/
Board-specific configuration.
=== /target/linux/<arch_name>/modules.mk
Arch-specific kernel module config file for menuconfig
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