Raspberry Pi Zero 3W and Pi 4 Model A spotted in device trees

Raspberry Pi has quietly added Linux kernel device tree files for a Raspberry Pi Zero 3 W and a Raspberry Pi 4 Model A, which may indicate the upcoming release of new boards. The Zero 3 W is expected to be powered by a Broadcom BCM2711 SoC, a quad-core Cortex-A72 chip that is also used in the Raspberry Pi 4, representing a significant upgrade from the Cortex-A53 RP3A0 chip in the Zero 2 W. The device tree files also suggest the Zero 3 W may have a PCIe controller and a 4-lane CSI configuration for the camera, but the details are not clear and may be subject to change. The Raspberry Pi 4 Model A is likely to be a variant of the existing Pi 4 Model B, but with possibly some changes to the board layout.