[PATCH v3 2/6] dt-bindings: gpio: Add DW GPIO debounce clock property

[<Sergey.Semin@xxxxxxxxxxxxxxxxxxxx>]

From: Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx>

Port A of the DW GPIO controller may optionally have a debounce
logic enabled if it was synthesized with that functionality enabled.
In this case a dedicated reference clock should be declared in the
node with corresponding "db" name presented in the clock-names
property.

Signed-off-by: Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx>
Acked-by: Rob Herring <robh@xxxxxxxxxx>
Cc: Alexey Malahov <Alexey.Malahov@xxxxxxxxxxxxxxxxxxxx>
Cc: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
Cc: Paul Burton <paulburton@xxxxxxxxxx>
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
 Documentation/devicetree/bindings/gpio/snps,dw-apb-gpio.yaml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/gpio/snps,dw-apb-gpio.yaml b/Documentation/devicetree/bindings/gpio/snps,dw-apb-gpio.yaml
index f84f92c4dd53..58a8df367623 100644
--- a/Documentation/devicetree/bindings/gpio/snps,dw-apb-gpio.yaml
+++ b/Documentation/devicetree/bindings/gpio/snps,dw-apb-gpio.yaml
@@ -31,12 +31,16 @@ properties:
     maxItems: 1
 
   clocks:
+    minItems: 1
     items:
       - description: APB interface clock source
+      - description: DW GPIO debounce reference clock source
 
   clock-names:
+    minItems: 1
     items:
       - const: bus
+      - const: db
 
   resets:
     maxItems: 1
-- 
2.25.1