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-rw-r--r-- | Documentation/devicetree/bindings/soc/qcom/qcom,smem.yaml | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,smem.yaml b/Documentation/devicetree/bindings/soc/qcom/qcom,smem.yaml new file mode 100644 index 000000000..4149cf2b6 --- /dev/null +++ b/Documentation/devicetree/bindings/soc/qcom/qcom,smem.yaml @@ -0,0 +1,98 @@ +# 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>; + }; + }; + +... |