| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 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 | |
| 7 | title: Qualcomm Shared Memory Manager |
| 8 | |
| 9 | maintainers: |
| 10 | - Andy Gross <agross@kernel.org> |
| 11 | - Bjorn Andersson <bjorn.andersson@linaro.org> |
| 12 | |
| 13 | description: |
| 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 | |
| 18 | properties: |
| 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 | |
| 38 | required: |
| 39 | - compatible |
| 40 | - hwlocks |
| 41 | |
| 42 | oneOf: |
| 43 | - required: |
| 44 | - reg |
| 45 | - no-map |
| 46 | - required: |
| 47 | - memory-region |
| 48 | |
| 49 | additionalProperties: false |
| 50 | |
| 51 | examples: |
| 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 | ... |