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Date: Mon, 16 Nov 2015 16:57:33 -0800 From: Laura Abbott <laura@...bott.name> To: Rob Herring <robh+dt@...nel.org>, Frank Rowand <frowand.list@...il.com>, Sumit Semwal <sumit.semwal@...aro.org>, Andrew Andrianov <andrew@...mnt.org>, <arve@...roid.com>, Riley Andrews <riandrews@...roid.com> Cc: Laura Abbott <laura@...bott.name>, John Stultz <john.stultz@...aro.org>, Grant Likely <grant.likely@...aro.org>, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, Tom Gall <tom.gall@...aro.org>, Colin Cross <ccross@...gle.com>, devel@...verdev.osuosl.org, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, romlem@...gle.com, mitchelh@...eaurora.org, linux-arm-kernel@...ts.infradead.org, Feng Tang <feng.tang@...el.com>, Marek Szyprowski <m.szyprowski@...sung.com> Subject: [PATCHv2 1/3] ion: Devicetree bindings for Ion This adds a base set of devicetree bindings for the Ion memory manager. This supports setting up the generic set of heaps and their properties. Signed-off-by: Laura Abbott <laura@...bott.name> --- drivers/staging/android/ion/devicetree.txt | 50 ++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 drivers/staging/android/ion/devicetree.txt diff --git a/drivers/staging/android/ion/devicetree.txt b/drivers/staging/android/ion/devicetree.txt new file mode 100644 index 0000000..e1ea537 --- /dev/null +++ b/drivers/staging/android/ion/devicetree.txt @@ -0,0 +1,50 @@ +Ion Memory Manager + +Ion is a memory manager that allows for sharing of buffers via dma-buf. +Ion allows for different types of allocation via an abstraction called +a 'heap'. A heap represents a specific type of memory. Each heap has +a different type. There can be multiple instances of the same heap +type. + +Required properties for Ion + +- compatible: "linux,ion" PLUS a compatible property for the device + +All child nodes of a linux,ion node are interpreted as heaps + +required properties for heaps + +- compatible: compatible string for a heap type PLUS a compatible property +for the specific instance of the heap. Current heap types +-- linux,ion-heap-system +-- linux,ion-heap-system-contig +-- linux,ion-heap-carveout +-- linux,ion-heap-chunk +-- linux,ion-heap-dma +-- linux,ion-heap-custom + +Optional properties +- memory-region: A phandle to a memory region. Required for DMA heap type +(see reserved-memory.txt for details on the reservation) + +Example: + + ion { + compatbile = "qcom,msm8916-ion", "linux,ion"; + #address-cells = <1>; + #size-cells = <0>; + + ion-system-heap { + compatbile = "qcom,system-heap", "linux,ion-heap-system" + }; + + ion-camera-region { + compatible = "qcom,camera-heap", "linux,ion-heap-dma" + memory-region = <&camera_region>; + }; + + ion-fb-region { + compatbile = "qcom,fb-heap", "linux,ion-heap-dma" + memory-region = <&fb_region>; + }; + } -- 2.5.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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