dts: bindings: zephyr,linker-region property

Introduce optional `zephyr,linker-region` property which signifies that
the node should result in a linker memory region and what the name of
that region should be. Property added to compatibles likely to result
in a linker memory region; 'mmio-sram', 'arm,itcm`, `arm,dtcm`,
`nxp,imx-itcm`, `nxp,imx-dtcm` and `fixed-partitions`.

Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>

dts/bindings/arm/arm,dtcm.yaml

@@ -4,7 +4,7 @@ description: Cortex-M DTCM (Data Tightly Coupled Memory)
 
 compatible: "arm,dtcm"
 
-include: base.yaml
+include: [base.yaml, mem-region.yaml]
 
 properties:
     reg:

dts/bindings/arm/arm,itcm.yaml

@@ -4,7 +4,7 @@ description: Cortex-M ITCM (Instruction Tightly Coupled Memory)
 
 compatible: "arm,itcm"
 
-include: base.yaml
+include: [base.yaml, mem-region.yaml]
 
 properties:
     reg:

dts/bindings/arm/nxp,imx-dtcm.yaml

@@ -5,7 +5,7 @@ description: i.MX DTCM (Data Tightly Coupled Memory)
 
 compatible: "nxp,imx-dtcm"
 
-include: base.yaml
+include: [base.yaml, mem-region.yaml]
 
 properties:
     reg:

dts/bindings/arm/nxp,imx-itcm.yaml

@@ -5,7 +5,7 @@ description: i.MX ITCM (Instruction Tightly Coupled Memory)
 
 compatible: "nxp,imx-itcm"
 
-include: base.yaml
+include: [base.yaml, mem-region.yaml]
 
 properties:
     reg:

dts/bindings/base/mem-region.yaml

@@ -0,0 +1,13 @@
+# Copyright (c) 2021, CSIRO
+# SPDX-License-Identifier: Apache-2.0
+# Common fields for devices resulting in linker memory regions
+
+properties:
+  zephyr,memory-region:
+    type: string
+    required: false
+    description: |
+      Signify that this node should result in a dedicated linker script
+      memory region in the final executable. The region address and size
+      is taken from the <reg> property, while the name is the value of
+      this property.

dts/bindings/memory-controllers/st,stm32-backup-sram.yaml

@@ -9,7 +9,7 @@ description: |
 
 compatible: "st,stm32-backup-sram"
 
-include: base.yaml
+include: [base.yaml, mem-region.yaml]
 
 properties:
   label:

dts/bindings/mtd/fixed-partitions.yaml

@@ -28,3 +28,12 @@ child-binding:
           type: array
           description: register space
           required: true
+       zephyr,memory-region:
+          type: string
+          required: false
+          description: |
+            Signify that this node should result in a dedicated linker script
+            memory region in the final executable. The region address and size
+            is taken from the <reg> property, while the name is the value of
+            this property. This must only be added to memory-mapped partitions,
+            not partitions on external flash.

dts/bindings/sram/mmio-sram.yaml

@@ -5,7 +5,7 @@ description: Generic on-chip SRAM description
 
 compatible: "mmio-sram"
 
-include: base.yaml
+include: [base.yaml, mem-region.yaml]
 
 properties:
     reg: