[PATCH v4 03/11] dt-bindings: rtc: isil,isl1208: Document clock and clock-names properties

[Biju Das <biju.das.jz@xxxxxxxxxxxxxx>]

As per the HW manual, XTOSCB bit setting is as follows

If using an external clock signal, set the XTOSCB bit as 1 to
disable the crystal oscillator.

If using an external crystal, the XTOSCB bit needs to be set at 0
to enable the crystal oscillator.

Document clock and clock-names properties.

Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
---
v4:
 * New patch
---
 .../devicetree/bindings/rtc/isil,isl1208.yaml       | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/Documentation/devicetree/bindings/rtc/isil,isl1208.yaml b/Documentation/devicetree/bindings/rtc/isil,isl1208.yaml
index 565965147ce6..6c270dd53605 100644
--- a/Documentation/devicetree/bindings/rtc/isil,isl1208.yaml
+++ b/Documentation/devicetree/bindings/rtc/isil,isl1208.yaml
@@ -25,6 +25,19 @@ properties:
   reg:
     maxItems: 1
 
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    description: |
+      Use xin, if connected to an external crystal.
+      Use clkin, if connected to an external clock signal.
+    oneOf:
+      - items:
+          - const: xin
+      - items:
+          - const: clkin
+
   interrupts:
     minItems: 1
     maxItems: 2
-- 
2.25.1