[PATCH v6 06/11] 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>
Reviewed-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
v5->v6:
 * Added Rb tag from Geert.
v4->v5:
 * Replaced oneOf->enum for clock-names as it is simpler.
 * Added Rb tag from Conor.
v4:
 * New patch
---
 .../devicetree/bindings/rtc/isil,isl1208.yaml         | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Documentation/devicetree/bindings/rtc/isil,isl1208.yaml b/Documentation/devicetree/bindings/rtc/isil,isl1208.yaml
index 565965147ce6..11f7378d4997 100644
--- a/Documentation/devicetree/bindings/rtc/isil,isl1208.yaml
+++ b/Documentation/devicetree/bindings/rtc/isil,isl1208.yaml
@@ -25,6 +25,17 @@ 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.
+    enum:
+      - xin
+      - clkin
+
   interrupts:
     minItems: 1
     maxItems: 2
-- 
2.25.1