[PATCH v4 1/2] dt-bindings: pci: Retrain Link to work around Gen2 training defect.

[Nadeem Athani <nadeem@xxxxxxxxxxx>]

Cadence controller will not initiate autonomous speed change if strapped as
Gen2. The Retrain Link bit is set as quirk to enable this speed change.
Adding a quirk flag based on a new compatible string.

Signed-off-by: Nadeem Athani <nadeem@xxxxxxxxxxx>
---
 Documentation/devicetree/bindings/pci/cdns,cdns-pcie-host.yaml | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/pci/cdns,cdns-pcie-host.yaml b/Documentation/devicetree/bindings/pci/cdns,cdns-pcie-host.yaml
index 293b8ec318bc..204d78f9efe3 100644
--- a/Documentation/devicetree/bindings/pci/cdns,cdns-pcie-host.yaml
+++ b/Documentation/devicetree/bindings/pci/cdns,cdns-pcie-host.yaml
@@ -15,7 +15,9 @@ allOf:
 
 properties:
   compatible:
-    const: cdns,cdns-pcie-host
+    enum:
+        - cdns,cdns-pcie-host
+        - cdns,cdns-pcie-host-quirk-retrain
 
   reg:
     maxItems: 2
-- 
2.15.0