dt-bindings: timer: sprd-timer: convert to YAML

Convert the Spreadtrum SC9860 timer bindings to DT schema.

Changes during conversion:
  - rename file to match compatible
  - add sprd,sc9860-suspend-timer which was previously undocumented
  - minor grammar fix in description
Signed-off-by: Stanislav Jakubek <stano.jakubek@gmail.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Link: https://lore.kernel.org/r/ZoU95lBgoyF/8Md3@standask-GA-A55M-S2HPSigned-off-by: Rob Herring (Arm) <robh@kernel.org>

Documentation/devicetree/bindings/timer/sprd,sc9860-timer.yaml

+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/timer/sprd,sc9860-timer.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Spreadtrum SC9860 timer
+
+maintainers:
+  - Orson Zhai <orsonzhai@gmail.com>
+  - Baolin Wang <baolin.wang7@gmail.com>
+  - Chunyan Zhang <zhang.lyra@gmail.com>
+
+description:
+  The Spreadtrum SC9860 platform provides 3 general-purpose timers.
+  These timers can support 32bit or 64bit counter, as well as supporting
+  period mode or one-shot mode, and they can be a wakeup source
+  during deep sleep.
+
+properties:
+  compatible:
+    enum:
+      - sprd,sc9860-timer
+      - sprd,sc9860-suspend-timer
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: sprd,sc9860-timer
+    then:
+      required:
+        - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    soc {
+      #address-cells = <2>;
+      #size-cells = <2>;
+
+      timer@40050000 {
+        compatible = "sprd,sc9860-timer";
+        reg = <0 0x40050000 0 0x20>;
+        interrupts = <GIC_SPI 26 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&ext_32k>;
+      };
+    };
+...

Documentation/devicetree/bindings/timer/spreadtrum,sprd-timer.txt

-Spreadtrum timers
-
-The Spreadtrum SC9860 platform provides 3 general-purpose timers.
-These timers can support 32bit or 64bit counter, as well as supporting
-period mode or one-shot mode, and they are can be wakeup source
-during deep sleep.
-
-Required properties:
-- compatible: should be "sprd,sc9860-timer" for SC9860 platform.
-- reg: The register address of the timer device.
-- interrupts: Should contain the interrupt for the timer device.
-- clocks: The phandle to the source clock (usually a 32.768 KHz fixed clock).
-
-Example:
-	timer@40050000 {
-		compatible = "sprd,sc9860-timer";
-		reg = <0 0x40050000 0 0x20>;
-		interrupts = <GIC_SPI 26 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&ext_32k>;
-	};