[PATCH 1/3] dt-bindings: watchdog: mt7621-wdt: add phandle to access system controller registers

[Sergio Paracuellos <sergio.paracuellos@gmail.com>]

MT7621 SoC provides a system controller node for accessing to some registers.
Add a phandle to this node to avoid using MIPS related arch operations and
includes in watchdog driver code.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
---
 .../bindings/watchdog/mediatek,mt7621-wdt.yaml       | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/watchdog/mediatek,mt7621-wdt.yaml b/Documentation/devicetree/bindings/watchdog/mediatek,mt7621-wdt.yaml
index b2b17fdf4..3c545065f 100644
--- a/Documentation/devicetree/bindings/watchdog/mediatek,mt7621-wdt.yaml
+++ b/Documentation/devicetree/bindings/watchdog/mediatek,mt7621-wdt.yaml
@@ -14,11 +14,18 @@ allOf:
 
 properties:
   compatible:
-    const: mediatek,mt7621-wdt
+    items:
+      - const: mediatek,mt7621-wdt
+      - const: syscon
 
   reg:
     maxItems: 1
 
+  ralink,sysctl:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      phandle of syscon used to control system registers
+
 required:
   - compatible
   - reg
@@ -28,6 +35,7 @@ additionalProperties: false
 examples:
   - |
     watchdog@100 {
-      compatible = "mediatek,mt7621-wdt";
+      compatible = "mediatek,mt7621-wdt", "syscon";
       reg = <0x100 0x100>;
+      ralink,sysctl = <&sysc>;
     };
-- 
2.25.1