# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
%YAML 1.2
---
$id:
http://devicetree.org/schemas/soc/qcom/qcom,smd.yaml#
$schema:
http://devicetree.org/meta-schemas/core.yaml#
title: Qualcomm Shared Memory Driver
maintainers:
- Andy Gross <agross@kernel.org>
- Bjorn Andersson <bjorn.andersson@linaro.org>
- Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
description:
The Qualcomm Shared Memory Driver is a FIFO based communication channel for
sending data between the various subsystems in Qualcomm platforms.
Using the top-level SMD node is deprecated. Instead, the SMD edges are defined
directly below the device node representing the respective remote subsystem
or remote processor.
deprecated: true
properties:
compatible:
const: qcom,smd
patternProperties:
"^smd-edge|rpm$":
$ref: /schemas/remoteproc/qcom,smd-edge.yaml#
unevaluatedProperties: false
description:
Each subnode of the SMD node represents a remote subsystem or a remote
processor of some sort - or in SMD language an "edge". The name of the
edges are not important.
required:
- compatible
additionalProperties: false
examples:
# The following example represents a smd node, with one edge representing the
# "rpm" subsystem. For the "rpm" subsystem we have a device tied to the
# "rpm_request" channel.
# NOTE: This is deprecated, represent the RPM using "qcom,rpm-proc" instead.
- |
#include <dt-bindings/interrupt-controller/arm-gic.h>
shared-memory {
compatible = "qcom,smd";
rpm {
interrupts = <GIC_SPI 168 IRQ_TYPE_EDGE_RISING>;
qcom,ipc = <&apcs 8 0>;
qcom,smd-edge = <15>;
rpm-requests {
compatible = "qcom,rpm-msm8974", "qcom,smd-rpm";
qcom,smd-channels = "rpm_requests";
clock-controller {
compatible = "qcom,rpmcc-msm8974", "qcom,rpmcc";
#clock-cells = <1>;
};
};
};
};
