[PATCH v2 1/2] dt-bindings: PCI: designware: Add binding for ZRX-DC PHY property

[Anvesh Salveru <anvesh.s@samsung.com>]

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 "snps,phy-zrxdc-compliant"
property in DesignWare controller DT node.

CC: Rob Herring <robh+dt@kernel.org>
CC: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Anvesh Salveru <anvesh.s@samsung.com>
Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com>
Reviewed-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
---
Change in v2: None

 Documentation/devicetree/bindings/pci/designware-pcie.txt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/pci/designware-pcie.txt b/Documentation/devicetree/bindings/pci/designware-pcie.txt
index 78494c4050f7..9507ac38ac89 100644
--- a/Documentation/devicetree/bindings/pci/designware-pcie.txt
+++ b/Documentation/devicetree/bindings/pci/designware-pcie.txt
@@ -38,6 +38,8 @@ Optional properties:
    for data corruption. CDM registers include standard PCIe configuration
    space registers, Port Logic registers, DMA and iATU (internal Address
    Translation Unit) registers.
+- snps,phy-zrxdc-compliant: This property is needed if phy complies with the
+  ZRX-DC specification.
 RC mode:
 - num-viewport: number of view ports configured in hardware. If a platform
   does not specify it, the driver assumes 2.
-- 
2.17.1