Add support for Interrupts to be translated by the GIC-600
Interrupt Translation Service (ITS).
ITS provides a software mechanism for translating message-based
interrupts into Locality-specific Peripheral Interrupts (LPIs).

This is based on prior work from XiaoDong Huang and
Peter Geis fixing this issue specifically for Rockchip 356x.
Plus comments of Robin Murphy about Non-Coherent properties.

Signed-off-by: Lucas Tanure <lucas.tanure@collabora.com>
---
 arch/arm64/boot/dts/rockchip/rk3588s.dtsi | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3588s.dtsi b/arch/arm64/boot/dts/rockchip/rk3588s.dtsi
index 24919cb5c153..695aed05eba2 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588s.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588s.dtsi
@@ -1594,6 +1594,25 @@ gic: interrupt-controller@fe600000 {
 		mbi-ranges = <424 56>;
 		msi-controller;
 		#interrupt-cells = <4>;
+		ranges;
+
+		its0: msi-controller@fe640000 {
+			compatible = "arm,gic-v3-its";
+			msi-controller;
+			dma-noncoherent;
+			#msi-cells = <1>;
+			reg = <0x0 0xfe640000 0x0 0x20000>;
+			power-domains = <&power RK3588_PD_PCIE>;
+		};
+
+		its1: msi-controller@fe660000 {
+			compatible = "arm,gic-v3-its";
+			msi-controller;
+			dma-noncoherent;
+			#msi-cells = <1>;
+			reg = <0x0 0xfe660000 0x0 0x20000>;
+			power-domains = <&power RK3588_PD_PCIE>;
+		};
 
 		ppi-partitions {
 			ppi_partition0: interrupt-partition-0 {
-- 
2.39.2