[PATCH v31 3/5] dt-bindings: i2c: ast2600-i2c.yaml: Add global-regs properties

Add the aspeed,global-regs phandle to reference the AST2600 global
registers syscon node, containing the SoC-common I2C register set.

These properties apply only to the AST2600 binding. Legacy DTs remain
unchanged.

Acked-by: Conor Dooley <[email protected]>
Reviewed-by: Rob Herring (Arm) <[email protected]>
Signed-off-by: Ryan Chen <[email protected]>
---
Changes in v29:
- remove aspeed,enable-dma properties.

Changes in v28:
- update commit message correspond with aspeed,enable-dma.
- remove aspeed,transfer-mode and add aspeed,enable-dma property and
  description.
- Fix aspeed,enable-dma description to reflect hardware capability rather
  than software behavior

Changes in v27:
- change aspeed,transfer-mode to aspeed,enable-dma.
---
 Documentation/devicetree/bindings/i2c/aspeed,ast2600-i2c.yaml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/i2c/aspeed,ast2600-i2c.yaml b/Documentation/devicetree/bindings/i2c/aspeed,ast2600-i2c.yaml
index abc614315dff..21469715d845 100644
--- a/Documentation/devicetree/bindings/i2c/aspeed,ast2600-i2c.yaml
+++ b/Documentation/devicetree/bindings/i2c/aspeed,ast2600-i2c.yaml
@@ -48,6 +48,12 @@ properties:
   resets:
     maxItems: 1
 
+  aspeed,global-regs:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      Phandle reference to the i2c global syscon node, containing the
+      SoC-common i2c register set.
+
 required:
   - reg
   - compatible
@@ -70,4 +76,5 @@ examples:
         resets = <&syscon ASPEED_RESET_I2C>;
         clock-frequency = <100000>;
         interrupts = <GIC_SPI 110 IRQ_TYPE_LEVEL_HIGH>;
+        aspeed,global-regs = <&i2c_global>;
     };

-- 
2.34.1