Messages in this thread Patch in this message | | | From | Bjorn Andersson <> | Subject | [PATCH v2 2/4] dt-bindings: soc: smem: Make indirection optional | Date | Thu, 30 Sep 2021 11:21:09 -0700 |
| |
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> ---
Changes since v1: - None
.../bindings/soc/qcom/qcom,smem.yaml | 34 ++++++++++++++++--- 1 file changed, 30 insertions(+), 4 deletions(-)
diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,smem.yaml b/Documentation/devicetree/bindings/soc/qcom/qcom,smem.yaml index f7e17713b3d8..4149cf2b66be 100644 --- a/Documentation/devicetree/bindings/soc/qcom/qcom,smem.yaml +++ b/Documentation/devicetree/bindings/soc/qcom/qcom,smem.yaml @@ -10,14 +10,18 @@ maintainers: - Andy Gross <agross@kernel.org> - Bjorn Andersson <bjorn.andersson@linaro.org> -description: | - This binding describes the Qualcomm Shared Memory Manager, used to share data - between various subsystems and OSes in Qualcomm platforms. +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. @@ -29,11 +33,19 @@ properties: $ref: /schemas/types.yaml#/definitions/phandle description: handle to RPM message memory resource + no-map: true + required: - compatible - - memory-region - hwlocks +oneOf: + - required: + - reg + - no-map + - required: + - memory-region + additionalProperties: false examples: @@ -43,6 +55,20 @@ examples: #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; -- 2.29.2
| |