[PATCH v4 1/2] dt-bindings: PCI: mediatek-gen3: Add support for controlling power and reset

[Jian Yang <jian.yang@mediatek.com>]

From: "jian.yang" <jian.yang@mediatek.com>

Add new properties to support control power supplies and reset pin of
a downstream component.

Signed-off-by: jian.yang <jian.yang@mediatek.com>
---
 .../bindings/pci/mediatek-pcie-gen3.yaml      | 30 +++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml b/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml
index 7e8c7a2a5f9b..a4f6b48d57fa 100644
--- a/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml
+++ b/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml
@@ -84,6 +84,26 @@ properties:
     items:
       enum: [ phy, mac ]
 
+  vpcie1v8-supply:
+    description:
+      The regulator phandle that provides 1.8V power from root port to a
+      downstream component.
+
+  vpcie3v3-supply:
+    description:
+      The regulator phandle that provides 3.3V power from root port to a
+      downstream component.
+
+  vpcie12v-supply:
+    description:
+      The regulator phandle that provides 12V power from root port to a
+      downstream component.
+
+  dsc-reset-gpios:
+    description:
+      The extra reset pin other than PERST# required by a downstream component.
+    maxItems: 1
+
   clocks:
     minItems: 4
     maxItems: 6
@@ -238,5 +258,15 @@ examples:
                       #interrupt-cells = <1>;
                       interrupt-controller;
             };
+
+            pcie@0 {
+                device_type = "pci";
+                reg = <0x0 0x0 0x0 0x0 0x0>;
+                vpcie3v3-supply = <&pcie3v3_regulator>;
+
+                #address-cells = <3>;
+                #size-cells = <2>;
+                ranges;
+            };
         };
     };
-- 
2.18.0