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dt-bindings: net: dp83822: change ti,rmii-mode description

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Drop reference to the 25MHz clock as it has nothing to do with connecting
the PHY and the MAC.
Add info about the reference clock direction between the PHY and the MAC
as it depends on the selected rmii mode.

Suggested-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jérémie Dautheribes <jeremie.dautheribes@bootlin.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20240305141309.127669-1-jeremie.dautheribes@bootlin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jérémie Dautheribes 2024-03-05 15:13:09 +01:00 committed by Jakub Kicinski
parent 7a04ff1277
commit b72413211b
1 changed files with 4 additions and 4 deletions
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8
Documentation/devicetree/bindings/net/ti,dp83822.yaml
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@ -84,10 +84,10 @@ properties:
description: |
If present, select the RMII operation mode. Two modes are
available:
- RMII master, where the PHY operates from a 25MHz clock reference,
provided by a crystal or a CMOS-level oscillator
- RMII slave, where the PHY operates from a 50MHz clock reference,
provided by a CMOS-level oscillator
- RMII master, where the PHY outputs a 50MHz reference clock which can
be connected to the MAC.
- RMII slave, where the PHY expects a 50MHz reference clock input
shared with the MAC.
The RMII operation mode can also be configured by its straps.
If the strap pin is not set correctly or not set at all, then this can be
used to configure it.