linux-kernel - [PATCH v7 3/5] dt-bindings: PHY: P2U: Add binding for ZRX-DC PHY property

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Date:   Thu,  7 Jan 2021 20:58:41 +0530
From:   Shradha Todi <shradha.t@...sung.com>
To:     linux-kernel@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-pci@...r.kernel.org
Cc:     pankaj.dubey@...sung.com, sriram.dash@...sung.com,
        niyas.ahmed@...sung.com, p.rajanbabu@...sung.com,
        l.mehra@...sung.com, hari.tv@...sung.com,
        Shradha Todi <shradha.t@...sung.com>,
        Anvesh Salveru <anvesh.salveru@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        Vidya Sagar <vidyas@...dia.com>
Subject: [PATCH v7 3/5] dt-bindings: PHY: P2U: Add binding for ZRX-DC PHY
 property

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 <anvesh.salveru@...il.com>
Signed-off-by: Pankaj Dubey <pankaj.dubey@...sung.com>
Signed-off-by: Shradha Todi <shradha.t@...sung.com>
Cc: Rob Herring <robh+dt@...nel.org>
Cc: Kishon Vijay Abraham I <kishon@...com>
Cc: Vidya Sagar <vidyas@...dia.com>
---
 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