[PATCH v2 1/3] dt-bindings: cache: qcom,llcc: Document Hawi SoC

Francisco Munoz Ruiz
2026-04-07T21:52:08Z

Add documentation for the Last Level Cache Controller (LLCC) bindings
to support Hawi SoC 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 <francisco.ruiz@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
---
.../devicetree/bindings/cache/qcom,llcc.yaml | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)

diff --git a/Documentation/devicetree/bindings/cache/qcom,llcc.yaml b/Documentation/devicetree/bindings/cache/qcom,llcc.yaml
index 995d57815781..40b737ad2230 100644
--- a/Documentation/devicetree/bindings/cache/qcom,llcc.yaml
+++ b/Documentation/devicetree/bindings/cache/qcom,llcc.yaml
@@ -21,6 +21,7 @@ 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