p71924506
/
linux_old1
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

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 <jcmvbkbc@gmail.com>
This commit is contained in:
Max Filippov 2016-11-04 14:44:22 -07:00
parent 9d2ffe5c62
commit 644b213ccc
1 changed files with 16 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
arch/xtensa/boot/dts/kc705.dts
View File

@ -11,4 +11,20 @@ memory@0 {
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;
};
};
};