[PATCH 1/2] dt-bindings: gpio: rockchip: add clock-names

[Jianqun Xu]

Add 'clock-names' to the gpio dt node. so the driver could get clocks by
a const char id, this patch names the clock-names as
  - 'bus': the apb clock for cpu to access the gpio controller
  - 'db': the debounce clock for cpu to set debounce clock rate

Since the old dt nodes may have no clock-names, this patch not make them
as part of 'required properties'.

Signed-off-by: Jianqun Xu <jay.xu@xxxxxxxxxxxxxx>
---
 .../devicetree/bindings/gpio/rockchip,gpio-bank.yaml        | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml b/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml
index affd823c881d..d43d4c71bebf 100644
--- a/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml
+++ b/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml
@@ -27,6 +27,12 @@ properties:
       - description: APB interface clock source
       - description: GPIO debounce reference clock source
 
+  clock-names:
+    minItems: 1
+    items:
+      - const: bus
+      - const: db
+
   gpio-ranges: true
 
   gpio-controller: true
-- 
2.25.1