dt-bindings: watchdog: qcom,pm8916-wdt: add parent spmi node to example

The PM8916 watchdog is part of an SPMI PMIC, which lives on an SPMI bus.

Add a parent SPMI bus node with an '#address-cells' of 2 and
'#size-cells' of 0 instead of relying on the fact that the default
number of register cells happen to match (i.e. 1 + 1).

Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Link: https://lore.kernel.org/r/20231130174254.13180-1-johan+linaro@kernel.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

Author: jhovold

Documentation/devicetree/bindings/watchdog/qcom,pm8916-wdt.yaml

@@ -30,22 +30,27 @@ examples:
     #include <dt-bindings/interrupt-controller/irq.h>
     #include <dt-bindings/spmi/spmi.h>
 
-    pmic@0 {
-        compatible = "qcom,pm8916", "qcom,spmi-pmic";
-        reg = <0x0 SPMI_USID>;
-        #address-cells = <1>;
+    spmi {
+        #address-cells = <2>;
         #size-cells = <0>;
 
-        pon@800 {
-            compatible = "qcom,pm8916-pon";
-            reg = <0x800>;
-            mode-bootloader = <0x2>;
-            mode-recovery = <0x1>;
-
-            watchdog {
-                compatible = "qcom,pm8916-wdt";
-                interrupts = <0x0 0x8 6 IRQ_TYPE_EDGE_RISING>;
-                timeout-sec = <60>;
+        pmic@0 {
+            compatible = "qcom,pm8916", "qcom,spmi-pmic";
+            reg = <0x0 SPMI_USID>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            pon@800 {
+                compatible = "qcom,pm8916-pon";
+                reg = <0x800>;
+                mode-bootloader = <0x2>;
+                mode-recovery = <0x1>;
+
+                watchdog {
+                    compatible = "qcom,pm8916-wdt";
+                    interrupts = <0x0 0x8 6 IRQ_TYPE_EDGE_RISING>;
+                    timeout-sec = <60>;
+                };
             };
         };
     };