Device drivers are not just peripheral drivers. The baseband driver, the wifi driver, the kernel display adapter driver, the touch driver, the drivers to handle

Device drivers are not just peripheral drivers. The baseband driver, the wifi driver, the kernel display adapter driver, the touch driver, the drivers to handle the hardware buttons, the PCH and FSB controller hubs, bluetooth drivers, bluetooth device drivers, and NFC drivers, at the least. You may also be missing accelerometer and thermometer drivers.