mirror of
https://github.com/torvalds/linux.git
synced 2026-04-20 15:53:59 -04:00
7a99e87e2e
In the olden days the Qualcomm shared memory (SMEM) region consisted of multiple chunks of memory, so SMEM was described as a standalone node with references to its various memory regions. But practically all modern Qualcomm platforms has a single reserved memory region used for SMEM. So rather than having to use two nodes to describe the one SMEM region, update the binding to allow the reserved-memory region alone to describe SMEM. The olden format is preserved as valid, as this is widely used already. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Reviewed-by: Rob Herring <robh@kernel.org> Reviewed-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org> Link: https://lore.kernel.org/r/20210930182111.57353-3-bjorn.andersson@linaro.org
99 lines
1.9 KiB
YAML
99 lines
1.9 KiB
YAML
# 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 binding
|
|
|
|
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>;
|
|
};
|
|
};
|
|
|
|
...
|