[PATCH v1 1/2] dt-bindings: mfd: maxim,max77686: document optional RTC address

[Svyatoslav Ryhel <clamor95@gmail.com>]

Document an optional second I2C address for the PMIC's RTC device, to be
used if the RTC is located at a non-default I2C address

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
---
 .../devicetree/bindings/mfd/maxim,max77686.yaml   | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/mfd/maxim,max77686.yaml b/Documentation/devicetree/bindings/mfd/maxim,max77686.yaml
index c13d51e462ba..2d4aad8feaeb 100644
--- a/Documentation/devicetree/bindings/mfd/maxim,max77686.yaml
+++ b/Documentation/devicetree/bindings/mfd/maxim,max77686.yaml
@@ -32,7 +32,17 @@ properties:
     maxItems: 1
 
   reg:
-    maxItems: 1
+    description:
+      Can contain an optional second I2C address pointing to the PMIC's
+      RTC device. If no RTC address is provided, a default address specific
+      to this PMIC will be used.
+    minItems: 1
+    maxItems: 2
+
+  reg-names:
+    items:
+      - const: pmic
+      - const: rtc
 
   voltage-regulators:
     $ref: /schemas/regulator/maxim,max77686.yaml
@@ -59,7 +69,8 @@ examples:
 
         max77686: pmic@9 {
             compatible = "maxim,max77686";
-            reg = <0x09>;
+            reg = <0x09>, <0x06>;
+            reg-names = "pmic", "rtc";
 
             interrupt-parent = <&gpx0>;
             interrupts = <7 IRQ_TYPE_LEVEL_LOW>;
-- 
2.51.0