The scripts here are dedicated for Chrome OS Factory Software, for the process of turning off the device for packaging. Most clamshell devices will try to do battery cut-off in this stage (or check battery charging level). Chromeboxes usually prefer shutdown. Routers or non-conventional devices may prefer reboot.
To change cut-off options:
If you are changing the cut-off options for the finalization when building factory toolkit, copy the cutoff.json.default to your board overlay into file path chromeos-base/factory-board/files/py/config/cutoff.json. Change values in the config file, and rebuild a new factory toolkit. This config file also applies to reset shim.
If you want to set a different value for reset shim (for example to reset after OQC), or for finalization when the RMA shim is already created, use setup/image_tool edit_cutoff to modify the cut-off config stored in toolkit_config payload.
This folder is shared by Chrome OS Factory Toolkit (complete execution environment with Python) and Factory Reset Shim (also known as factory_install image, using a very limited root file system without Python) so it must not have any dependency with other files outside this folder.
Scripts here will be installed to /usr/local/factory/sh/cutoff. Factory Toolkit will execute the scripts via Gooftool by reading arguments from Finalize pytest. Reset shim (build_image factory_install) will invoke this by factory_installer.sh using arguments from lsb-factory.
As explained in previous section, the factory software may execute cut-off scripts using different approaches that you may override execution options.
But the most easy way would be to create a per-board configuration file so it will be shared as default value. To do that, go to chromeos-base/factory-board in your board overlay and put the files in files/py/config/cutoff.json.
There are few options you can set:
CUTOFF_METHOD: What to do for cut-off. Available options: shutdown, reboot, ectool_cutoff and battery_cutoff.CUTOFF_AC_STATE: Should AC be removed of not. Available options: connect_ac, remove_ac.CUTOFF_BATTERY_MIN_PERCENTAGE: Minimal allowed value for battery charging level (in percentage). Should be 0~100.CUTOFF_BATTERY_MAX_PERCENTAGE: Maximal allowed value for battery charging level (in percentage). Should be 0~100.CUTOFF_BATTERY_MIN_VOLTAGE: Minimal allowed value for battery voltage.CUTOFF_BATTERY_MAX_VOLTAGE: Maximal allowed value for battery voltage.SHOPFLOOR_URL: URL to shopfloor server that we can send request to inform “device is cut-off and ready for packaging”.TTY: Path of terminal for output. Defaults to /run/frecon/vt0.The options should be set in JSON format. For example:
{ "CUTOFF_METHOD": "battery_cutoff", "CUTOFF_AC_STATE": "remove_ac", "CUTOFF_BATTERY_MIN_PERCENTAGE": 60, "CUTOFF_BATTERY_MAX_PERCENTAGE": 80, "SHOPFLOOR_URL": "http://192.168.1.1/" }