dts: arm: sifli: sf32lb52x： define mailbox

Mbox is hardware interface between Application HCPU and Bluetooth LCPU.

Signed-off-by: Gang He <[email protected]>

Author: Gang He

dts/arm/sifli/sf32lb52x-ram012.dtsi

@@ -3,6 +3,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+#include <zephyr/dt-bindings/memory-attr/memory-attr-arm.h>
 #include <mem.h>
 
 / {
@@ -13,7 +14,21 @@
 	soc {
 		ram012: memory@20000000 {
 			compatible = "mmio-sram";
-			reg = <0x20000000 DT_SIZE_K(512)>;
+			reg = <0x20000000 DT_SIZE_K(511)>;
+		};
+		sram0_shared: memory@2007fc00 {
+			compatible = "zephyr,memory-region", "mmio-sram";
+			reg = <0x2007fc00 DT_SIZE_K(1)>;
+			device_type = "memory";
+			zephyr,memory-region = "sram0_shared";
+			zephyr,memory-attr = <(DT_MEM_ARM(ATTR_MPU_RAM_NOCACHE))>;
+			};
+		sram1_shared: memory@20400000 {
+			compatible = "zephyr,memory-region", "mmio-sram";
+			reg = <0x20400000 DT_SIZE_K(64)>;
+			device_type = "memory";
+			zephyr,memory-region = "sram1_shared";
+			zephyr,memory-attr = <(DT_MEM_ARM(ATTR_MPU_RAM_NOCACHE))>;
 		};
 	};
 };

dts/arm/sifli/sf32lb52x.dtsi

@@ -129,6 +129,13 @@
 			status = "disabled";
 		};
 
+		mailbox: mailbox@50082000 {
+			compatible = "sifli,sf32lb-mailbox";
+			reg = <0x50082000 0x1000>;
+			interrupts = <58 1>;
+			status = "disabled";
+		};
+
 		usart1: serial@50084000 {
 			compatible = "sifli,sf32lb-usart";
 			reg = <0x50084000 0x400>;

dts/bindings/bluetooth/sifli,sf32lb-mailbox.yaml

@@ -0,0 +1,16 @@
+# Mailbox Bluetooth HCI device
+
+description: Bluetooth HCI behind a mailbox IPC device (H:4)
+
+compatible: "sifli,sf32lb-mailbox"
+
+include: bt-hci.yaml
+
+properties:
+  bt-hci-name:
+    default: "mailbox"
+  bt-hci-bus:
+    default: "virtual"
+
+mail-cells:
+  - channel