From 644b213ccced83495eb54dd48764f7e963bcc1c0 Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Fri, 4 Nov 2016 14:44:22 -0700 Subject: [PATCH] xtensa: configure shared DMA pool reservation in kc705 DTS Add example 64MByte long reservation in the first 512MBytes of physical memory used as shared DMA pool. Signed-off-by: Max Filippov --- arch/xtensa/boot/dts/kc705.dts | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/arch/xtensa/boot/dts/kc705.dts b/arch/xtensa/boot/dts/kc705.dts index b1f4ee8c9a22..6106bdc097ad 100644 --- a/arch/xtensa/boot/dts/kc705.dts +++ b/arch/xtensa/boot/dts/kc705.dts @@ -11,4 +11,20 @@ device_type = "memory"; reg = <0x00000000 0x38000000>; }; + + reserved-memory { + #address-cells = <1>; + #size-cells = <1>; + ranges; + + /* global autoconfigured region for contiguous allocations */ + linux,cma { + compatible = "shared-dma-pool"; + reusable; + size = <0x04000000>; + alignment = <0x2000>; + alloc-ranges = <0x00000000 0x20000000>; + linux,cma-default; + }; + }; }; -- 2.20.1