# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause %YAML 1.2 --- $id: http://devicetree.org/schemas/mailbox/qcom-ipcc.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# title: Qualcomm Technologies, Inc. Inter-Processor Communication Controller maintainers: - Manivannan Sadhasivam description: The Inter-Processor Communication Controller (IPCC) is a centralized hardware to route interrupts across various subsystems. It involves a three-level addressing scheme called protocol, client and signal. For example, consider an entity on the Application Processor Subsystem (APSS) that wants to listen to Modem's interrupts via Shared Memory Point to Point (SMP2P) interface. In such a case, the client would be Modem (client-id is 2) and the signal would be SMP2P (signal-id is 2). The SMP2P itself falls under the Multiprocessor (MPROC) protocol (protocol-id is 0). Refer include/dt-bindings/mailbox/qcom-ipcc.h for the list of such IDs. properties: compatible: items: - enum: - qcom,sm6350-ipcc - qcom,sm8250-ipcc - qcom,sm8350-ipcc - qcom,sc7280-ipcc - const: qcom,ipcc reg: maxItems: 1 interrupts: maxItems: 1 interrupt-controller: true "#interrupt-cells": const: 3 description: The first cell is the client-id, the second cell is the signal-id and the third cell is the interrupt type. "#mbox-cells": const: 2 description: The first cell is the client-id, and the second cell is the signal-id. required: - compatible - reg - interrupts - interrupt-controller - "#interrupt-cells" - "#mbox-cells" additionalProperties: false examples: - | #include #include mailbox@408000 { compatible = "qcom,sm8250-ipcc", "qcom,ipcc"; reg = <0x408000 0x1000>; interrupts = ; interrupt-controller; #interrupt-cells = <3>; #mbox-cells = <2>; }; smp2p-modem { compatible = "qcom,smp2p"; interrupts-extended = <&ipcc_mproc IPCC_CLIENT_MPSS IPCC_MPROC_SIGNAL_SMP2P IRQ_TYPE_EDGE_RISING>; mboxes = <&ipcc_mproc IPCC_CLIENT_MPSS IPCC_MPROC_SIGNAL_SMP2P>; /* Other SMP2P fields */ };