[PATCH RFC 11/11] ARM: dts: bcm2711: add bcm2711-dma node

[Stefan Wahren]

BCM2711 has 4 DMA channels with a 40-bit address range, allowing them
to access the full 4GB of memory on a Pi 4. Not sure which adjustments to
the parent node (scb) are required.

Signed-off-by: Stefan Wahren <stefan.wahren at i2se.com>
---
 arch/arm/boot/dts/bcm2711.dtsi | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm/boot/dts/bcm2711.dtsi b/arch/arm/boot/dts/bcm2711.dtsi
index 590068b..12f373b 100644
--- a/arch/arm/boot/dts/bcm2711.dtsi
+++ b/arch/arm/boot/dts/bcm2711.dtsi
@@ -536,6 +536,22 @@
 				#size-cells = <0x1>;
 			};
 		};
+
+		dma40: dma-controller at 7e007b00 {
+			compatible = "brcm,bcm2711-dma";
+			reg = <0x0 0x7e007b00 0x400>;
+			interrupts = <GIC_SPI 89 IRQ_TYPE_LEVEL_HIGH>, /* dma4 11 */
+				     <GIC_SPI 90 IRQ_TYPE_LEVEL_HIGH>, /* dma4 12 */
+				     <GIC_SPI 91 IRQ_TYPE_LEVEL_HIGH>, /* dma4 13 */
+				     <GIC_SPI 92 IRQ_TYPE_LEVEL_HIGH>; /* dma4 14 */
+			interrupt-names = "dma11",
+					  "dma12",
+					  "dma13",
+					  "dma14";
+			#dma-cells = <1>;
+			/* The VPU firmware uses DMA channel 11 for VCHIQ */
+			brcm,dma-channel-mask = <0x7000>;
+		};
 	};
 };
 
-- 
2.7.4