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# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/soc/qcom/qcom,smd.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Qualcomm Shared Memory Driver
maintainers:
- Andy Gross <agross@kernel.org>
- Bjorn Andersson <bjorn.andersson@linaro.org>
- Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
description:
The Qualcomm Shared Memory Driver is a FIFO based communication channel for
sending data between the various subsystems in Qualcomm platforms.
properties:
compatible:
const: qcom,smd
patternProperties:
"^.*-edge|rpm$":
$ref: /schemas/remoteproc/qcom,smd-edge.yaml#
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.
properties:
rpm-requests:
type: object
description:
In turn, subnodes of the "edges" represent devices tied to SMD
channels on that "edge". The names of the devices are not
important. The properties of these nodes are defined by the
individual bindings for the SMD devices.
properties:
qcom,smd-channels:
$ref: /schemas/types.yaml#/definitions/string-array
minItems: 1
maxItems: 32
description:
A list of channels tied to this device, used for matching the
device to channels.
required:
- compatible
- qcom,smd-channels
additionalProperties: true
unevaluatedProperties: false
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.
- |
#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-channels = "rpm_requests";
clock-controller {
compatible = "qcom,rpmcc-msm8974", "qcom,rpmcc";
#clock-cells = <1>;
};
};
};
};
|
