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, a region of 15 reserved-memory used to share data between various subsystems and OSes in 16 Qualcomm platforms. 17 18properties: 19 compatible: 20 const: qcom,smem 21 22 reg: 23 maxItems: 1 24 25 memory-region: 26 maxItems: 1 27 description: handle to memory reservation for main SMEM memory region. 28 29 hwlocks: 30 maxItems: 1 31 32 qcom,rpm-msg-ram: 33 $ref: /schemas/types.yaml#/definitions/phandle 34 description: handle to RPM message memory resource 35 36 no-map: true 37 38required: 39 - compatible 40 - hwlocks 41 42oneOf: 43 - required: 44 - reg 45 - no-map 46 - required: 47 - memory-region 48 49additionalProperties: false 50 51examples: 52 - | 53 reserved-memory { 54 #address-cells = <1>; 55 #size-cells = <1>; 56 ranges; 57 58 smem@fa00000 { 59 compatible = "qcom,smem"; 60 reg = <0xfa00000 0x200000>; 61 no-map; 62 63 hwlocks = <&tcsr_mutex 3>; 64 }; 65 }; 66 - | 67 reserved-memory { 68 #address-cells = <1>; 69 #size-cells = <1>; 70 ranges; 71 72 smem_region: smem@fa00000 { 73 reg = <0xfa00000 0x200000>; 74 no-map; 75 }; 76 }; 77 78 smem { 79 compatible = "qcom,smem"; 80 81 memory-region = <&smem_region>; 82 qcom,rpm-msg-ram = <&rpm_msg_ram>; 83 84 hwlocks = <&tcsr_mutex 3>; 85 }; 86 87 soc { 88 #address-cells = <1>; 89 #size-cells = <1>; 90 ranges; 91 92 rpm_msg_ram: sram@fc428000 { 93 compatible = "qcom,rpm-msg-ram"; 94 reg = <0xfc428000 0x4000>; 95 }; 96 }; 97 98... 99