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Commit 849ff819 authored by Yisheng Xie's avatar Yisheng Xie Committed by Greg Kroah-Hartman
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staging/android/ion: remove useless document file 



After commit 9828282e ("staging: android: ion: Remove old platform
support"), the document about devicetree of ion is no need anymore, so
just remove it.

Signed-off-by: default avatarYisheng Xie <xieyisheng1@huawei.com>
Acked-by: default avatarLaura Abbott <labbott@redhat.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 2ea659a9

Documentation/devicetree/bindings/staging/ion/hi6220-ion.txt

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Hi6220 SoC ION

===================================================================

Required properties:

- compatible : "hisilicon,hi6220-ion"

- list of the ION heaps

	- heap name : maybe heap_sys_user@0

	- heap id   : id should be unique in the system.

	- heap base : base ddr address of the heap,0 means that

	it is dynamic.

	- heap size : memory size and 0 means it is dynamic.

	- heap type : the heap type of the heap, please also

	see the define in ion.h(drivers/staging/android/uapi/ion.h)

-------------------------------------------------------------------

Example:

	hi6220-ion {

		compatible = "hisilicon,hi6220-ion";

		heap_sys_user@0 {

			heap-name = "sys_user";

			heap-id   = <0x0>;

			heap-base = <0x0>;

			heap-size = <0x0>;

			heap-type = "ion_system";

		};

		heap_sys_contig@0 {

			heap-name = "sys_contig";

			heap-id   = <0x1>;

			heap-base = <0x0>;

			heap-size = <0x0>;

			heap-type = "ion_system_contig";

		};

	};

MAINTAINERS

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@@ -846,7 +846,6 @@ M: Laura Abbott <labbott@redhat.com> 
M:	Sumit Semwal <sumit.semwal@linaro.org>

L:	devel@driverdev.osuosl.org

S:	Supported

F:	Documentation/devicetree/bindings/staging/ion/

F:	drivers/staging/android/ion

F:	drivers/staging/android/uapi/ion.h

F:	drivers/staging/android/uapi/ion_test.h

drivers/staging/android/ion/devicetree.txt

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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.



Specific heap instances are tied to heap IDs. Heap IDs are not to be specified

in the devicetree.



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 = "hisilicon,ion", "linux,ion";



		ion-system-heap {

			compatbile = "hisilicon,system-heap", "linux,ion-heap-system"

		};



		ion-camera-region {

			compatible = "hisilicon,camera-heap", "linux,ion-heap-dma"

			memory-region = <&camera_region>;

		};



		ion-fb-region {

			compatbile = "hisilicon,fb-heap", "linux,ion-heap-dma"

			memory-region = <&fb_region>;

		};

	}