1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) 2%YAML 1.2 3--- 4$id: "http://devicetree.org/schemas/soc/qcom/qcom,smem.yaml#" 5$schema: "http://devicetree.org/meta-schemas/core.yaml#" 6 7title: Qualcomm Shared Memory Manager binding 8 9maintainers: 10 - Andy Gross <agross@kernel.org> 11 - Bjorn Andersson <bjorn.andersson@linaro.org> 12 13description: | 14 This binding describes the Qualcomm Shared Memory Manager, used to share data 15 between various subsystems and OSes in Qualcomm platforms. 16 17properties: 18 compatible: 19 const: qcom,smem 20 21 memory-region: 22 maxItems: 1 23 description: handle to memory reservation for main SMEM memory region. 24 25 hwlocks: 26 maxItems: 1 27 28 qcom,rpm-msg-ram: 29 $ref: /schemas/types.yaml#/definitions/phandle 30 description: handle to RPM message memory resource 31 32required: 33 - compatible 34 - memory-region 35 - hwlocks 36 37additionalProperties: false 38 39examples: 40 - | 41 reserved-memory { 42 #address-cells = <1>; 43 #size-cells = <1>; 44 ranges; 45 46 smem_region: smem@fa00000 { 47 reg = <0xfa00000 0x200000>; 48 no-map; 49 }; 50 }; 51 52 smem { 53 compatible = "qcom,smem"; 54 55 memory-region = <&smem_region>; 56 qcom,rpm-msg-ram = <&rpm_msg_ram>; 57 58 hwlocks = <&tcsr_mutex 3>; 59 }; 60 61 soc { 62 #address-cells = <1>; 63 #size-cells = <1>; 64 ranges; 65 66 rpm_msg_ram: sram@fc428000 { 67 compatible = "qcom,rpm-msg-ram"; 68 reg = <0xfc428000 0x4000>; 69 }; 70 }; 71 72... 73