beagleconnect-freedom/sw/linux

mikroBUS Linux kernel driver

Build

To build, make sure you've already built your previous kernel properly, then...

cd <your linux source tree>
git am <beagleconnect source tree>/sw/linux/*.patch
scripts/kconfig/merge_config.sh <beagleconnect source tree>/sw/linux/mikrobus.config
make
sudo make modules_install
sudo make install

Then reboot and profit!

Notes:

• You'll need at least a 5.8 kernel

Instantiation

mikroBUS ports on a system can be of two different types:

• physical mikroBUS ports on host : For host systems like a PocketBeagle or a BeagleBone Black attached to mikroBUS cape, the mikroBUS ports are physically present on the board and they can be instantiated over a suitable device tree overlay[1] to describe the mikroBUS port, with physical mikroBUS ports the add-on board discovery is performed directly by reading the manifest from the ID Board[2] physically over 1-wire.
• mikroBUS ports instantiated over Greybus : mikroBUS ports are instantiated over Greybus and in this case the add-on board discovery is performed along with the Greybus interface discovery mechanism over the Greybus manifest, in this case the remote MCU device will either store the add-on board manifests during compile time or fetch it during runtime from ID Board(TODO) and pass it to the host along with the Greybus interface manifest.

1. PocketBeagle mikroBUS port 0 device tree overlay
2. mikroBUS ID adapter hardware draft documentation