The kernel pseudo platform bus has no secrets from you anymore. With bus matching mechanisms, you are able to understand how, when, and why your driver has been loaded, as well as which device it was for. We can implement any probe function, based on the matching mechanism we want. Since the main purpose of a driver is to handle a device, we are now able to populate devices in the system (the old and depreciated way). To finish in beauty, the next chapter will exclusively deal with the device tree, which is the new mechanism used to populate devices, along with their configurations, on the system.