dt-bindings: watchdog: sprd,sp9860-wdt: convert to YAML

Convert Spreadtrum SP9860 watchdog timer bindings to DT schema.
Adjust file name to match compatible.
Signed-off-by: Stanislav Jakubek <stano.jakubek@gmail.com>
Acked-by: Chunyan Zhang <zhang.lyra@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/ZdDUlGdqH7Qv3SDu@standask-GA-A55M-S2HPSigned-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

Documentation/devicetree/bindings/watchdog/sprd,sp9860-wdt.yaml

+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/watchdog/sprd,sp9860-wdt.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Spreadtrum SP9860 watchdog timer
+
+maintainers:
+  - Orson Zhai <orsonzhai@gmail.com>
+  - Baolin Wang <baolin.wang7@gmail.com>
+  - Chunyan Zhang <zhang.lyra@gmail.com>
+
+allOf:
+  - $ref: watchdog.yaml#
+
+properties:
+  compatible:
+    const: sprd,sp9860-wdt
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 2
+
+  clock-names:
+    items:
+      - const: enable
+      - const: rtc_enable
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - timeout-sec
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/sprd,sc9860-clk.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    soc {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        watchdog@40310000 {
+            compatible = "sprd,sp9860-wdt";
+            reg = <0 0x40310000 0 0x1000>;
+            interrupts = <GIC_SPI 61 IRQ_TYPE_LEVEL_HIGH>;
+            clocks = <&aon_gate CLK_APCPU_WDG_EB>, <&aon_gate CLK_AP_WDG_RTC_EB>;
+            clock-names = "enable", "rtc_enable";
+            timeout-sec = <12>;
+        };
+    };
+...

Documentation/devicetree/bindings/watchdog/sprd-wdt.txt

-Spreadtrum SoCs Watchdog timer
-
-Required properties:
-- compatible : Should be "sprd,sp9860-wdt".
-- reg : Specifies base physical address and size of the registers.
-- interrupts : Exactly one interrupt specifier.
-- timeout-sec : Contain the default watchdog timeout in seconds.
-- clock-names : Contain the input clock names.
-- clocks : Phandles to input clocks.
-
-Example:
-	watchdog: watchdog@40310000 {
-		compatible = "sprd,sp9860-wdt";
-		reg = <0 0x40310000 0 0x1000>;
-		interrupts = <GIC_SPI 61 IRQ_TYPE_LEVEL_HIGH>;
-		timeout-sec = <12>;
-		clock-names = "enable", "rtc_enable";
-		clocks = <&clk_aon_apb_gates1 8>, <&clk_aon_apb_rtc_gates 9>;
-	};