# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) # Copyright 2019 Linaro Ltd. %YAML 1.2 --- $id: "http://devicetree.org/schemas/misc/intel,ixp4xx-ahb-queue-manager.yaml#" $schema: "http://devicetree.org/meta-schemas/core.yaml#" title: Intel IXP4xx AHB Queue Manager maintainers: - Linus Walleij description: | The IXP4xx AHB Queue Manager maintains queues as circular buffers in an 8KB embedded SRAM along with hardware pointers. It is used by both the XScale processor and the NPEs (Network Processing Units) in the IXP4xx for accelerating queues, especially for networking. Clients pick queues from the queue manager with foo-queue = <&qmgr N> where the &qmgr is a phandle to the queue manager and N is the queue resource number. The queue resources available and their specific purpose on a certain IXP4xx system will vary. properties: compatible: items: - const: intel,ixp4xx-ahb-queue-manager reg: maxItems: 1 interrupts: items: - description: Interrupt for queues 0-31 - description: Interrupt for queues 32-63 required: - compatible - reg - interrupts examples: - | #include qmgr: queue-manager@60000000 { compatible = "intel,ixp4xx-ahb-queue-manager"; reg = <0x60000000 0x4000>; interrupts = <3 IRQ_TYPE_LEVEL_HIGH>, <4 IRQ_TYPE_LEVEL_HIGH>; };