Add mailbox node that describes AP-to-APM mailbox, that can be
used for communicating with APM co-processor on Exynos850 SoCs.

Signed-off-by: Alexey Klimov <alexey.klimov@linaro.org>
---
 arch/arm64/boot/dts/exynos/exynos850.dtsi | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm64/boot/dts/exynos/exynos850.dtsi b/arch/arm64/boot/dts/exynos/exynos850.dtsi
index cb55015c8dce..fcb665ccc7ae 100644
--- a/arch/arm64/boot/dts/exynos/exynos850.dtsi
+++ b/arch/arm64/boot/dts/exynos/exynos850.dtsi
@@ -298,6 +298,15 @@ cmu_apm: clock-controller@11800000 {
 			clock-names = "oscclk", "dout_clkcmu_apm_bus";
 		};
 
+		ap2apm_mailbox: mailbox@11900000 {
+			compatible = "samsung,exynos850-mbox";
+			reg = <0x11900000 0x1000>;
+			clocks = <&cmu_apm CLK_GOUT_MAILBOX_APM_AP_PCLK>;
+			clock-names = "pclk";
+			interrupts = <GIC_SPI 49 IRQ_TYPE_LEVEL_HIGH>;
+			#mbox-cells = <0>;
+		};
+
 		cmu_cmgp: clock-controller@11c00000 {
 			compatible = "samsung,exynos850-cmu-cmgp";
 			reg = <0x11c00000 0x8000>;

-- 
2.51.0