dt-bindings: mailbox: fsl,mu: add i.MX95 Generic/ELE/V2X MU compatible

Add i.MX95 Generic, Secure Enclave and V2X Message Unit compatible string.
And the MUs in AONMIX has internal RAMs for SCMI shared buffer usage.

Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Jassi Brar <jassisinghbrar@gmail.com>

Documentation/devicetree/bindings/mailbox/fsl,mu.yaml

@@ -29,8 +29,11 @@ properties:
       - const: fsl,imx8ulp-mu
       - const: fsl,imx8-mu-scu
       - const: fsl,imx8-mu-seco
-      - const: fsl,imx93-mu-s4
       - const: fsl,imx8ulp-mu-s4
+      - const: fsl,imx93-mu-s4
+      - const: fsl,imx95-mu
+      - const: fsl,imx95-mu-ele
+      - const: fsl,imx95-mu-v2x
       - items:
           - const: fsl,imx93-mu
           - const: fsl,imx8ulp-mu
@@ -95,6 +98,19 @@ properties:
   power-domains:
     maxItems: 1
 
+  ranges: true
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 1
+
+patternProperties:
+  "^sram@[a-f0-9]+":
+    $ref: /schemas/sram/sram.yaml#
+    unevaluatedProperties: false
+
 required:
   - compatible
   - reg
@@ -122,6 +138,15 @@ allOf:
         required:
           - interrupt-names
 
+  - if:
+      not:
+        properties:
+          compatible:
+            const: fsl,imx95-mu
+    then:
+      patternProperties:
+        "^sram@[a-f0-9]+": false
+
 additionalProperties: false
 
 examples:
@@ -134,3 +159,34 @@ examples:
         interrupts = <GIC_SPI 176 IRQ_TYPE_LEVEL_HIGH>;
         #mbox-cells = <2>;
     };
+
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    mailbox@445b0000 {
+        compatible = "fsl,imx95-mu";
+        reg = <0x445b0000 0x10000>;
+        ranges;
+        interrupts = <GIC_SPI 226 IRQ_TYPE_LEVEL_HIGH>;
+        #address-cells = <1>;
+        #size-cells = <1>;
+        #mbox-cells = <2>;
+
+        sram@445b1000 {
+            compatible = "mmio-sram";
+            reg = <0x445b1000 0x400>;
+            ranges = <0x0 0x445b1000 0x400>;
+            #address-cells = <1>;
+            #size-cells = <1>;
+
+            scmi-sram-section@0 {
+                compatible = "arm,scmi-shmem";
+                reg = <0x0 0x80>;
+            };
+
+            scmi-sram-section@80 {
+                compatible = "arm,scmi-shmem";
+                reg = <0x80 0x80>;
+            };
+        };
+    };