From: Hyesoo Yu <hyesoo.yu@xxxxxxxxxxx> Document devicetree binding for chunk heap on dma heap framework Signed-off-by: Hyesoo Yu <hyesoo.yu@xxxxxxxxxxx> Signed-off-by: Minchan Kim <minchan@xxxxxxxxxx> --- .../bindings/dma-buf/chunk_heap.yaml | 52 +++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma-buf/chunk_heap.yaml diff --git a/Documentation/devicetree/bindings/dma-buf/chunk_heap.yaml b/Documentation/devicetree/bindings/dma-buf/chunk_heap.yaml new file mode 100644 index 000000000000..f382bee02778 --- /dev/null +++ b/Documentation/devicetree/bindings/dma-buf/chunk_heap.yaml @@ -0,0 +1,52 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/dma-buf/chunk_heap.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Device tree binding for chunk heap on DMA HEAP FRAMEWORK + +maintainers: + - Sumit Semwal <sumit.semwal@xxxxxxxxxx> + +description: | + The chunk heap is backed by the Contiguous Memory Allocator (CMA) and + allocates the buffers that are made up to a list of fixed size chunks + taken from CMA. Chunk sizes are configurated when the heaps are created. + +properties: + compatible: + enum: + - dma_heap,chunk + + memory-region: + maxItems: 1 + + alignment: + maxItems: 1 + +required: + - compatible + - memory-region + - alignment + +additionalProperties: false + +examples: + - | + reserved-memory { + #address-cells = <2>; + #size-cells = <1>; + + chunk_memory: chunk_memory { + compatible = "shared-dma-pool"; + reusable; + size = <0x10000000>; + }; + }; + + chunk_default_heap: chunk_default_heap { + compatible = "dma_heap,chunk"; + memory-region = <&chunk_memory>; + alignment = <0x10000>; + }; -- 2.29.2.299.gdc1121823c-goog
