dt-bindings: firmware: google,gs101-acpm-ipc: add PMIC child node

The PMIC is supposed to be a child of ACPM, add it here to describe the
connection.

Reviewed-by: Krzysztof Kozlowski <[email protected]>
Signed-off-by: André Draszik <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Krzysztof Kozlowski <[email protected]>

Author: andred

Documentation/devicetree/bindings/firmware/google,gs101-acpm-ipc.yaml

@@ -27,6 +27,15 @@ properties:
   mboxes:
     maxItems: 1
 
+  pmic:
+    description: Child node describing the main PMIC.
+    type: object
+    additionalProperties: true
+
+    properties:
+      compatible:
+        const: samsung,s2mpg10-pmic
+
   shmem:
     description:
       List of phandle pointing to the shared memory (SHM) area. The memory
@@ -43,8 +52,34 @@ additionalProperties: false
 
 examples:
   - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
     power-management {
         compatible = "google,gs101-acpm-ipc";
         mboxes = <&ap2apm_mailbox>;
         shmem = <&apm_sram>;
+
+        pmic {
+            compatible = "samsung,s2mpg10-pmic";
+            interrupts-extended = <&gpa0 6 IRQ_TYPE_LEVEL_LOW>;
+
+            regulators {
+                LDO1 {
+                    regulator-name = "vdd_ldo1";
+                    regulator-min-microvolt = <700000>;
+                    regulator-max-microvolt = <1300000>;
+                    regulator-always-on;
+                };
+
+                // ...
+
+                BUCK1 {
+                    regulator-name = "vdd_mif";
+                    regulator-min-microvolt = <450000>;
+                    regulator-max-microvolt = <1300000>;
+                    regulator-always-on;
+                    regulator-boot-on;
+                };
+            };
+        };
     };