dt-bindings: mtd: partitions: Convert brcm,trx to DT schema

Convert the brcm,trx partition binding to DT schema format.

As the "linksys,ns-firmware" compatible also uses "brcm,trx" as a
fallback, move it to the converted binding.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

Author: robherring

Documentation/devicetree/bindings/mtd/partitions/brcm,trx.txt

@@ -0,0 +1,65 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mtd/partitions/brcm,trx.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom TRX Container Partition
+
+maintainers:
+  - Hauke Mehrtens <hauke@hauke-m.de>
+  - Rafał Miłecki <rafal@milecki.pl>
+
+description: >
+  TRX is Broadcom's official firmware format for the BCM947xx boards. It's used by
+  most of the vendors building devices based on Broadcom's BCM47xx SoCs and is
+  supported by the CFE bootloader.
+
+  Design of the TRX format is very minimalistic. Its header contains
+  identification fields, CRC32 checksum and the locations of embedded partitions.
+  Its purpose is to store a few partitions in a format that can be distributed as
+  a standalone file and written in a flash memory.
+
+  Container can hold up to 4 partitions. The first partition has to contain a
+  device executable binary (e.g. a kernel) as it's what the CFE bootloader starts
+  executing. Other partitions can be used for operating system purposes. This is
+  useful for systems that keep kernel and rootfs separated.
+
+  TRX doesn't enforce any strict partition boundaries or size limits. All
+  partitions have to be less than the 4GiB max size limit.
+
+  There are two existing/known TRX variants:
+    1) v1 which contains 3 partitions
+    2) v2 which contains 4 partitions
+
+  There aren't separated compatible bindings for them as version can be trivially
+  detected by a software parsing TRX header.
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - const: linksys,ns-firmware
+          - const: brcm,trx
+      - const: brcm,trx
+
+  brcm,trx-magic:
+    description: TRX magic, if it is different from the default magic.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    default: 0x30524448
+
+required:
+  - compatible
+
+allOf:
+  - $ref: partition.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    flash {
+        partitions {
+            compatible = "brcm,trx";
+        };
+    };

Documentation/devicetree/bindings/mtd/partitions/brcm,trx.yaml

@@ -30,13 +30,7 @@ properties:
 
 patternProperties:
   "^partition@[0-9a-f]+$":
-    $ref: partition.yaml#
-    properties:
-      compatible:
-        items:
-          - const: linksys,ns-firmware
-          - const: brcm,trx
-    unevaluatedProperties: false
+    $ref: partition.yaml#/$defs/partition-node
 
 required:
   - "#address-cells"