GitLab

Support optional factory-fit non-removable memory devices

Some boards feature non-removable memory devices with a no-fit option that
can only detected by seeing whether the device responds or not once we
start trying to talk to it. To support these, defer drive allocation until
the UnitAttached service call. This is already designed to dynamically
add extra drives in case a shared MMC bus is found, so the only difference
is that the initial number of drives is 0, not 1. Note that there is still
a minimum of 1 drive per slot for removable slots, since a removable slot
may be empty at module initialisation time, and there's no way to
electrically distinguish an empty socket from a no-fit socket.