[PATCH v3 2/4] dt-bindings: gpio: rockchip,gpio-bank: Add rockchip,grf property

Some Rockchip SoCs, such as the RV1106, give each GPIO bank its own
IO control (IOC) register block rather than grouping the registers of
all banks into a shared GRF region. Add an optional rockchip,grf
property to the gpio-bank binding so that each bank node can reference
the syscon for its own IOC block.

Signed-off-by: Simon Glass <[email protected]>
---

(no changes since v2)

Changes in v2:
- Add new patch for the per-bank IOC reference

 .../devicetree/bindings/gpio/rockchip,gpio-bank.yaml       | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml b/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml
index bdd83f42615c..774e9c7de606 100644
--- a/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml
+++ b/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml
@@ -44,6 +44,13 @@ properties:
   power-domains:
     maxItems: 1
 
+  rockchip,grf:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      The phandle of the syscon node managing the IO control registers
+      of this bank, on SoCs such as the RV1106 where each GPIO bank has
+      its own IOC block.
+
 patternProperties:
   "^.+-hog(-[0-9]+)?$":
     type: object
-- 
2.43.0