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Commit dd86c18c authored by Laura Abbott's avatar Laura Abbott Committed by Stephen Boyd
Browse files

msm: Add bindings for memblock_reserve memory 



Under some circumstances, drivers may wish to have a region of
memory set aside with memblock_reserved instead of memblock_remove.
Add bindings for this reservation.

Change-Id: I41f4eeebf2f1a38374a7c8a0b65f6907d6e38faa
Signed-off-by: default avatarLaura Abbott <lauraa@codeaurora.org>
parent 7b34af76

Documentation/devicetree/bindings/arm/msm/memory-reserve.txt

+17 −0
Original line number Diff line number Diff line
@@ -69,3 +69,20 @@ Required parameters: 
This region is assumed to be a part of a separate hole that has been removed

and this binding specifies the fixed location and size of the region within

that hole.





Some drivers may only wish to reserve memory from the system. Reserved memory

is still tracked internally by the Linux page allocator. The memory is reserved

from the buddy allocator at bootup but may be freed back at a later point in

time with memblock_free and free_bootmem_late.



Required parameters:

-qcom,memblock-reserve: base and size of block to be reserved. Drivers should

call memblock_is_reserved before attempting to use the base address to ensure

the memory was completely reserved.



	qcom,a-driver {

		compatible = "qcom,a-driver";

		/* reserve a 4MB region @ 0x200000 for use later */

		qcom,memblock-reserve = <0x200000 0x400000>;

	};