From: Hari Nagalla <hnagalla@ti.com>

The AM64x SoCs of the TI K3 family have a Cortex M4F core in the MCU
domain. This core can be used by non safety applications as a remote
processor. When used as a remote processor with virtio/rpmessage IPC,
two carveout reserved memory nodes are needed.

Disable by default as this node is not complete until mailbox data
is provided in the board level DT.

Signed-off-by: Hari Nagalla <hnagalla@ti.com>
Signed-off-by: Andrew Davis <afd@ti.com>
Tested-by: Wadim Egorov <w.egorov@phytec.de>
---
 arch/arm64/boot/dts/ti/k3-am64-mcu.dtsi | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am64-mcu.dtsi b/arch/arm64/boot/dts/ti/k3-am64-mcu.dtsi
index ad4bed5d3f9eb..a243c981e8535 100644
--- a/arch/arm64/boot/dts/ti/k3-am64-mcu.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am64-mcu.dtsi
@@ -161,4 +161,17 @@ mcu_esm: esm@4100000 {
 		/* Interrupt sources: esm0_cfg, esm0_hi, esm0_low, mrti0 */
 		ti,esm-pins = <0>, <1>, <2>, <85>;
 	};
+
+	mcu_m4fss: m4fss@5000000 {
+		compatible = "ti,am64-m4fss";
+		reg = <0x00 0x5000000 0x00 0x30000>,
+		      <0x00 0x5040000 0x00 0x10000>;
+		reg-names = "iram", "dram";
+		resets = <&k3_reset 9 1>;
+		firmware-name = "am64-mcu-m4f0_0-fw";
+		ti,sci = <&dmsc>;
+		ti,sci-dev-id = <9>;
+		ti,sci-proc-ids = <0x18 0xff>;
+		status = "disabled";
+	};
 };
-- 
2.39.2