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Date: Tue, 17 Nov 2020 10:19:35 -0800 From: Minchan Kim <minchan@...nel.org> To: Andrew Morton <akpm@...ux-foundation.org> Cc: LKML <linux-kernel@...r.kernel.org>, linux-mm <linux-mm@...ck.org>, hyesoo.yu@...sung.com, willy@...radead.org, david@...hat.com, iamjoonsoo.kim@....com, vbabka@...e.cz, surenb@...gle.com, pullip.cho@...sung.com, joaodias@...gle.com, hridya@...gle.com, sumit.semwal@...aro.org, john.stultz@...aro.org, Brian.Starkey@....com, linux-media@...r.kernel.org, devicetree@...r.kernel.org, robh@...nel.org, christian.koenig@....com, linaro-mm-sig@...ts.linaro.org, Minchan Kim <minchan@...nel.org> Subject: [PATCH 4/4] dma-heap: Devicetree binding for chunk heap From: Hyesoo Yu <hyesoo.yu@...sung.com> Document devicetree binding for chunk heap on dma heap framework Signed-off-by: Hyesoo Yu <hyesoo.yu@...sung.com> Signed-off-by: Minchan Kim <minchan@...nel.org> --- .../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@...aro.org> + +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
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