Add support for ZRX-DC compliant PHYs. If PHY is not compliant to ZRX-DC
specification, then after every 100ms link should transition to recovery
state during the low power states which increases power consumption.

Platforms with ZRX-DC compliant PHY can use "phy-zrxdc-compliant" property
in PCIe PHY DT node.

Signed-off-by: Anvesh Salveru <[email protected]>
Signed-off-by: Pankaj Dubey <[email protected]>
Signed-off-by: Shradha Todi <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: Kishon Vijay Abraham I <[email protected]>
Cc: Vidya Sagar <[email protected]>
---
 Documentation/devicetree/bindings/phy/phy-tegra194-p2u.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/phy/phy-tegra194-p2u.txt 
b/Documentation/devicetree/bindings/phy/phy-tegra194-p2u.txt
index d23ff90..73f2fa0 100644
--- a/Documentation/devicetree/bindings/phy/phy-tegra194-p2u.txt
+++ b/Documentation/devicetree/bindings/phy/phy-tegra194-p2u.txt
@@ -15,6 +15,10 @@ Required properties:
 Required properties for PHY port node:
 - #phy-cells: Defined by generic PHY bindings.  Must be 0.
 
+Optional properties for other PHY features:
+- phy-zrxdc-compliant: This property is needed if phy complies with the
+                      ZRX-DC specification.
+
 Refer to phy/phy-bindings.txt for the generic PHY binding properties.
 
 Example:
-- 
2.7.4

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