# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id:
http://devicetree.org/schemas/soc/qcom/qcom,smem.yaml#
$schema:
http://devicetree.org/meta-schemas/core.yaml#
title: Qualcomm Shared Memory Manager
maintainers:
- Andy Gross <agross@kernel.org>
- Bjorn Andersson <bjorn.andersson@linaro.org>
description:
This binding describes the Qualcomm Shared Memory Manager, a region of
reserved-memory used to share data between various subsystems and OSes in
Qualcomm platforms.
properties:
compatible:
const: qcom,smem
reg:
maxItems: 1
memory-region:
maxItems: 1
description: handle to memory reservation for main SMEM memory region.
hwlocks:
maxItems: 1
qcom,rpm-msg-ram:
$ref: /schemas/types.yaml#/definitions/phandle
description: handle to RPM message memory resource
no-map: true
required:
- compatible
- hwlocks
oneOf:
- required:
- reg
- no-map
- required:
- memory-region
additionalProperties: false
examples:
- |
reserved-memory {
#address-cells = <1>;
#size-cells = <1>;
ranges;
smem@fa00000 {
compatible = "qcom,smem";
reg = <0xfa00000 0x200000>;
no-map;
hwlocks = <&tcsr_mutex 3>;
};
};
- |
reserved-memory {
#address-cells = <1>;
#size-cells = <1>;
ranges;
smem_region: smem@fa00000 {
reg = <0xfa00000 0x200000>;
no-map;
};
};
smem {
compatible = "qcom,smem";
memory-region = <&smem_region>;
qcom,rpm-msg-ram = <&rpm_msg_ram>;
hwlocks = <&tcsr_mutex 3>;
};
soc {
#address-cells = <1>;
#size-cells = <1>;
ranges;
rpm_msg_ram: sram@fc428000 {
compatible = "qcom,rpm-msg-ram";
reg = <0xfc428000 0x4000>;
};
};
...
