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From:   Martin Blumenstingl <martin.blumenstingl@googlemail.com>
To:     robh+dt@kernel.org, andrew@lunn.ch, f.fainelli@gmail.com,
        linux-amlogic@lists.infradead.org, devicetree@vger.kernel.org
Cc:     jianxin.pan@amlogic.com, davem@davemloft.net,
        netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Subject: [PATCH v3 1/8] dt-bindings: net: meson-dwmac: Add the amlogic,rx-delay-ns property
Date:   Tue, 12 May 2020 23:10:56 +0200
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The PRG_ETHERNET registers on Meson8b and newer SoCs can add an RX
delay. Add a property with the known supported values so it can be
configured according to the board layout.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
 .../bindings/net/amlogic,meson-dwmac.yaml           | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml b/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml
index ae91aa9d8616..66074314e57a 100644
--- a/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml
@@ -67,6 +67,19 @@ allOf:
             PHY and MAC are adding a delay).
             Any configuration is ignored when the phy-mode is set to "rmii".
 
+        amlogic,rx-delay-ns:
+          enum:
+            - 0
+            - 2
+          default: 0
+          description:
+            The internal RGMII RX clock delay (provided by this IP block) in
+            nanoseconds. When phy-mode is set to "rgmii" then the RX delay
+            should be explicitly configured. When the phy-mode is set to
+            either "rgmii-id" or "rgmii-rxid" the RX clock delay is already
+            provided by the PHY. Any configuration is ignored when the
+            phy-mode is set to "rmii".
+
 properties:
   compatible:
     additionalItems: true
-- 
2.26.2