Add documentation for the Last Level Cache Controller (LLCC) bindings to support Hawi and upcoming Qualcomm SoCs where the System Cache Table (SCT) is programmed by firmware outside of Linux.
Introduce a property that specifies the base address of the shared memory region from which the driver should read SCT descriptors provided by firmware. Signed-off-by: Francisco Munoz Ruiz <[email protected]> Reviewed-by: Konrad Dybcio <[email protected]> --- .../devicetree/bindings/cache/qcom,llcc.yaml | 29 ++++++++++++++++++---- 1 file changed, 24 insertions(+), 5 deletions(-) diff --git a/Documentation/devicetree/bindings/cache/qcom,llcc.yaml b/Documentation/devicetree/bindings/cache/qcom,llcc.yaml index 995d57815781..ca1313de10ca 100644 --- a/Documentation/devicetree/bindings/cache/qcom,llcc.yaml +++ b/Documentation/devicetree/bindings/cache/qcom,llcc.yaml @@ -11,16 +11,17 @@ maintainers: description: | LLCC (Last Level Cache Controller) provides last level of cache memory in SoC, - that can be shared by multiple clients. Clients here are different cores in the - SoC, the idea is to minimize the local caches at the clients and migrate to - common pool of memory. Cache memory is divided into partitions called slices - which are assigned to clients. Clients can query the slice details, activate - and deactivate them. + that can be shared by multiple clients. Clients here are different cores in + the SoC. The idea is to minimize the local caches at the clients and migrate + to a common pool of memory. Cache memory is divided into partitions called + slices which are assigned to clients. Clients can query the slice details, + activate and deactivate them. properties: compatible: enum: - qcom,glymur-llcc + - qcom,hawi-llcc - qcom,ipq5424-llcc - qcom,kaanapali-llcc - qcom,qcs615-llcc @@ -57,6 +58,11 @@ properties: interrupts: maxItems: 1 + memory-region: + maxItems: 1 + description: handle to a reserved-memory node used for firmware-populated + SLC/SCT shared memory. + nvmem-cells: items: - description: Reference to an nvmem node for multi channel DDR @@ -318,6 +324,7 @@ allOf: contains: enum: - qcom,kaanapali-llcc + - qcom,hawi-llcc - qcom,sm8450-llcc - qcom,sm8550-llcc - qcom,sm8650-llcc @@ -340,6 +347,18 @@ allOf: - const: llcc3_base - const: llcc_broadcast_base - const: llcc_broadcast_and_base + - if: + properties: + compatible: + contains: + enum: + - qcom,hawi-llcc + then: + required: + - memory-region + else: + properties: + memory-region: false additionalProperties: false -- 2.34.1
