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Comments
As Doron noted, it's not called in the BUS driver... The child device's EvtDriverDeviceAdd Event Processing Callback is called in the FUNCTION driver when it is loaded on top of the PDO that your Bus Driver creates, and it (the FUNCTION driver) subsequently creates the FDO.
I know that the "Toaster" series of samples in the WDK has a sample bus driver. I've never reviewed it... I just know it exists. But it'll at least give you a place to start.
You could do Static Enumeration with this bus driver... though, frankly, it doesn't save you much effort.
Peter
Peter Viscarola
OSR
@OSRDrivers
They were, iMX7 was supported at least in 2020