arm64: dts: allwinner: a64: Add watchdog

Add a watchdog node for the A64, automatically enabled on all boards.
Since the device is compatible with an existing driver, we only reserve
a new compatible string to be used together with the fall back.
Tested on Olimex Teres-I.

Signed-off-by: Harald Geyer <harald@ccbib.org>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>

2 files changed, 11 insertions, 2 deletions

diff --git a/Documentation/devicetree/bindings/watchdog/sunxi-wdt.txt b/Documentation/devicetree/bindings/watchdog/sunxi-wdt.txt
index 62dd5baad70e..04fc368d828f 100644
--- a/Documentation/devicetree/bindings/watchdog/sunxi-wdt.txt
+++ b/Documentation/devicetree/bindings/watchdog/sunxi-wdt.txt
@@ -2,8 +2,10 @@ Allwinner SoCs Watchdog timer
 
 Required properties:
 
-- compatible : should be either "allwinner,sun4i-a10-wdt" or
-               "allwinner,sun6i-a31-wdt"
+- compatible : should be one of
+        "allwinner,sun4i-a10-wdt"
+        "allwinner,sun6i-a31-wdt"
+        "allwinner,sun50i-a64-wdt","allwinner,sun6i-a31-wdt"
 - reg : Specifies base physical address and size of the registers.
 
 Example:
diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
index 64e452a758fa..8401e7f887ff 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
@@ -665,5 +665,12 @@
                         #address-cells = <1>;
                         #size-cells = <0>;
                 };
+
+                wdt0: watchdog@1c20ca0 {
+                        compatible = "allwinner,sun50i-a64-wdt",
+                                     "allwinner,sun6i-a31-wdt";
+                        reg = <0x01c20ca0 0x20>;
+                        interrupts = <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>;
+                };
         };
 };