dt-bindings: mfd: atmel: Convert to YAML schema

Changes during conversion:

The text binding is misleading, add a fallback `atmel,at91sam9260-gpbr`
for both `microchip,sam9x60-gpbr` and `microchip,sam9x7-gpbr` which is
missing in old binding and `microchip,sam9x60-gpbr` is not a fallback
for `microchip,sam9x7-gpbr`.

Signed-off-by: Charan Pedumuru <charan.pedumuru@microchip.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20241219-gpbr-v1-1-e19a562ebf81@microchip.com
Signed-off-by: Lee Jones <lee@kernel.org>

diff --git a/Documentation/devicetree/bindings/mfd/atmel,at91sam9260-gpbr.yaml b/Documentation/devicetree/bindings/mfd/atmel,at91sam9260-gpbr.yaml
new file mode 100644 (file)
index 0000000..f805545
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/atmel,at91sam9260-gpbr.yaml
@@ -0,0 +1,44 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/atmel,at91sam9260-gpbr.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip AT91 General Purpose Backup Registers
+
+maintainers:
+  - Nicolas Ferre <nicolas.ferre@microchip.com>
+
+description:
+  The system controller embeds 256 bits of General Purpose Backup
+  registers organized as 8 32-bit registers.
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - atmel,at91sam9260-gpbr
+          - const: syscon
+      - items:
+          - enum:
+              - microchip,sam9x60-gpbr
+              - microchip,sam9x7-gpbr
+          - const: atmel,at91sam9260-gpbr
+          - const: syscon
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    syscon@fffffd50 {
+        compatible = "atmel,at91sam9260-gpbr", "syscon";
+        reg = <0xfffffd50 0x10>;
+    };

diff --git a/Documentation/devicetree/bindings/mfd/atmel-gpbr.txt b/Documentation/devicetree/bindings/mfd/atmel-gpbr.txt
deleted file mode 100644 (file)
index 3c989d1..0000000
--- a/Documentation/devicetree/bindings/mfd/atmel-gpbr.txt
+++ /dev/null
@@ -1,18 +0,0 @@
-* Device tree bindings for Atmel GPBR (General Purpose Backup Registers)
-
-The GPBR are a set of battery-backed registers.
-
-Required properties:
-- compatible:          Should be one of the following:
-                       "atmel,at91sam9260-gpbr", "syscon"
-                       "microchip,sam9x60-gpbr", "syscon"
-                       "microchip,sam9x7-gpbr", "microchip,sam9x60-gpbr", "syscon"
-- reg:                 contains offset/length value of the GPBR memory
-                       region.
-
-Example:
-
-gpbr: gpbr@fffffd50 {
-       compatible = "atmel,at91sam9260-gpbr", "syscon";
-       reg = <0xfffffd50 0x10>;
-};