[PATCH 8/9] dt-bindings: rtc: stmp3xxx-rtc: convert to dtschema

[Javier Carrasco <javier.carrasco.cruz@gmail.com>]

Convert existing binding to dtschema to support validation.

The 'fsl,imx28-rtc' compatible is currently not supported, and it is
only referenced in this binding and in nxp/mxs/imx28.dtsi. Therefore,
that compatible has been dropped, which triggers a warning when testing
the DT against the new binding.

There is another reference to fsl,stmp3xxx-rtc in nxp/mxs/imx23.dtsi,
where another unsupported compatible 'fsl,imx23-rtc' is used, and the
same problem would arise when testing the file against the new binding.

Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
---
 .../devicetree/bindings/rtc/fsl,stmp3xxx-rtc.yaml  | 45 ++++++++++++++++++++++
 .../devicetree/bindings/rtc/stmp3xxx-rtc.txt       | 21 ----------
 2 files changed, 45 insertions(+), 21 deletions(-)

diff --git a/Documentation/devicetree/bindings/rtc/fsl,stmp3xxx-rtc.yaml b/Documentation/devicetree/bindings/rtc/fsl,stmp3xxx-rtc.yaml
new file mode 100644
index 000000000000..bf70cce2701f
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/fsl,stmp3xxx-rtc.yaml
@@ -0,0 +1,45 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/rtc/fsl,stmp3xxx-rtc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: STMP3xxx/i.MX28 Time Clock Controller
+
+maintainers:
+  - Javier Carrasco <javier.carrasco.cruz@gmail.com>
+
+allOf:
+  - $ref: rtc.yaml#
+
+properties:
+  compatible:
+    const: fsl,stmp3xxx-rtc
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  stmp,crystal-freq:
+    description:
+      Override crystal frequency as determined from fuse bits.
+      Use <0> for "no crystal".
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 32000, 32768]
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    rtc@80056000 {
+        compatible = "fsl,stmp3xxx-rtc";
+        reg = <0x80056000 2000>;
+        interrupts = <29>;
+    };
diff --git a/Documentation/devicetree/bindings/rtc/stmp3xxx-rtc.txt b/Documentation/devicetree/bindings/rtc/stmp3xxx-rtc.txt
deleted file mode 100644
index fa6a94226669..000000000000
--- a/Documentation/devicetree/bindings/rtc/stmp3xxx-rtc.txt
+++ /dev/null
@@ -1,21 +0,0 @@
-* STMP3xxx/i.MX28 Time Clock controller
-
-Required properties:
-- compatible: should be one of the following.
-    * "fsl,stmp3xxx-rtc"
-- reg: physical base address of the controller and length of memory mapped
-  region.
-- interrupts: rtc alarm interrupt
-
-Optional properties:
-- stmp,crystal-freq: override crystal frequency as determined from fuse bits.
-  Only <32000> and <32768> are possible for the hardware.  Use <0> for
-  "no crystal".
-
-Example:
-
-rtc@80056000 {
-	compatible = "fsl,imx28-rtc", "fsl,stmp3xxx-rtc";
-	reg = <0x80056000 2000>;
-	interrupts = <29>;
-};

-- 
2.40.1