[PATCH 3/3] dt-bindings: gpio: rockchip,gpio add optional 'gpio-ranges'

[Jianqun Xu <jay.xu@xxxxxxxxxxxxxx>]

Add a optional property 'gpio-ranges', such as
    gpio-ranges = <&pinctrl 0 0 32>;

When the gpio nodes are under pinctrl, the property 'gpio-ranges' is
a optional property, but when they are under root node, the property
'gpio-ranges' is a required property.

Signed-off-by: Jianqun Xu <jay.xu@xxxxxxxxxxxxxx>
---
 .../devicetree/bindings/gpio/rockchip,gpio-bank.yaml       | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml b/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml
index d4e42c2b995b..7a075fcea75f 100644
--- a/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml
+++ b/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml
@@ -49,7 +49,12 @@ required:
   - interrupt-controller
   - "#interrupt-cells"
 
-additionalProperties: false
+additionalProperties: true
+  gpio-ranges:
+    maxItems: 1
+    description: |
+      The property is a optional if gpio node under pinctrl node;
+      but it is a required property if the gpio is under root node.
 
 examples:
   - |
-- 
2.25.1