dt-bindings: remoteproc: k3-r5f: Add memory-region-names

Add names to the memory-region-names for easier identification of memory
regions. As the meaning of the second memory region can be different
also require the use of memory-region-names if memory-region is in use.

Signed-off-by: Markus Schneider-Pargmann (TI) <msp@baylibre.com>
Link: https://lore.kernel.org/r/20260318-topic-am62a-ioddr-dt-v6-19-v3-2-c41473cb23c3@baylibre.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>

Documentation/devicetree/bindings/remoteproc/ti,k3-r5f-rproc.yaml

@@ -175,6 +175,24 @@ patternProperties:
               - description: LPM FS context data and reserved sections
               - description: DM RM/PM trace and firmware code/data
 
+      memory-region-names:
+        description: |
+          Names for the memory regions specified in the memory-region property.
+          The names must correspond with the entries in memory-region.
+        oneOf:
+          - description: Basic layout
+            items:
+              - const: dma
+              - const: firmware
+          - description: Detailed layout
+            items:
+              - const: dma
+              - const: ipc
+              - const: lpm-stub
+              - const: lpm-metadata
+              - const: lpm-context
+              - const: dm-firmware
+
 # Optional properties:
 # --------------------
 # The following properties are optional properties for each of the R5F cores:
@@ -227,6 +245,13 @@ patternProperties:
       - resets
       - firmware-name
 
+    if:
+      required:
+        - memory-region
+    then:
+      required:
+        - memory-region-names
+
     unevaluatedProperties: false
 
 allOf:
@@ -330,6 +355,7 @@ examples:
                         mboxes = <&mailbox0 &mbox_mcu_r5fss0_core0>;
                         memory-region = <&mcu_r5fss0_core0_dma_memory_region>,
                                         <&mcu_r5fss0_core0_memory_region>;
+                        memory-region-names = "dma", "firmware";
                         sram = <&mcu_r5fss0_core0_sram>;
                     };