The H6 SoC contains a message box that can be used to send messages and
interrupts back and forth between the ARM application CPUs and the ARISC
coprocessor. Add a device tree node for it.

Signed-off-by: Samuel Holland <sam...@sholland.org>
---
 arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi 
b/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi
index d93a7add67e7..950681b2f7d9 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi
@@ -189,6 +189,16 @@
                        #interrupt-cells = <3>;
                };
 
+               msgbox: mailbox@3003000 {
+                       compatible = "allwinner,sun50i-h6-msgbox",
+                                    "allwinner,sun6i-a31-msgbox";
+                       reg = <0x03003000 0x1000>;
+                       clocks = <&ccu CLK_BUS_MSGBOX>;
+                       resets = <&ccu RST_BUS_MSGBOX>;
+                       interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_HIGH>;
+                       #mbox-cells = <1>;
+               };
+
                pio: pinctrl@300b000 {
                        compatible = "allwinner,sun50i-h6-pinctrl";
                        reg = <0x0300b000 0x400>;
-- 
2.19.2

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