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dt-bindings: net: meson-dwmac: Add the amlogic,rx-delay-ns property

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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>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Martin Blumenstingl 2020-05-12 23:10:56 +02:00 committed by David S. Miller
parent 6cd35888a0
commit 7af4c8451d
1 changed files with 13 additions and 0 deletions
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13
Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml
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@ -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