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The PPE (packet process engine) hardware block is available in Qualcomm IPQ chipsets that support PPE architecture, such as IPQ9574. The PPE in the IPQ9574 SoC includes six Ethernet ports (6 GMAC and 6 XGMAC), which are used to connect with external PHY devices by PCS. It includes an L2 switch function for bridging packets among the 6 Ethernet ports and the CPU port. The CPU port enables packet transfer between the Ethernet ports and the ARM cores in the SoC, using the Ethernet DMA. The PPE also includes packet processing offload capabilities for various networking functions such as route and bridge flows, VLANs, different tunnel protocols and VPN. The PPE switch is modeled according to the Ethernet switch schema, with additional properties defined for the switch node for interrupts, clocks, resets, interconnects and Ethernet DMA. The switch port node is extended with additional properties for clocks and resets. Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Signed-off-by: Luo Jie <quic_luoj@quicinc.com> Link: https://patch.msgid.link/20250818-qcom_ipq_ppe-v8-1-1d4ff641fce9@quicinc.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>