diff options
| -rw-r--r-- | arch/arm/boot/dts/bcm2711.dtsi | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/bcm2711.dtsi b/arch/arm/boot/dts/bcm2711.dtsi index ac83dac2e6ba..34d24fe272e2 100644 --- a/arch/arm/boot/dts/bcm2711.dtsi +++ b/arch/arm/boot/dts/bcm2711.dtsi @@ -12,6 +12,26 @@ interrupt-parent = <&gicv2>; + reserved-memory { + #address-cells = <2>; + #size-cells = <1>; + ranges; + + /* + * arm64 reserves the CMA by default somewhere in ZONE_DMA32, + * that's not good enough for the BCM2711 as some devices can + * only address the lower 1G of memory (ZONE_DMA). + */ + linux,cma { + compatible = "shared-dma-pool"; + size = <0x2000000>; /* 32MB */ + alloc-ranges = <0x0 0x00000000 0x40000000>; + reusable; + linux,cma-default; + }; + }; + + soc { /* * Defined ranges: |