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dt-bindings: net: mdio: add reset-post-delay-us property

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Add "reset-post-delay-us" parameter to MDIO bus properties,
so it's possible to add a delay after reset deassert.
This is optional in case external hardware slows down
release of the reset signal.

Signed-off-by: Bruno Thomsen <bruno.thomsen@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Bruno Thomsen 2020-07-30 21:57:46 +02:00 committed by David S. Miller
parent bd0b33b248
commit c44a1b9175
1 changed files with 7 additions and 0 deletions
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7
Documentation/devicetree/bindings/net/mdio.yaml
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@ -39,6 +39,13 @@ properties:
and must therefore be appropriately determined based on all devices
requirements (maximum value of all per-device RESET pulse widths).
reset-post-delay-us:
description:
Delay after reset deassert in microseconds. It applies to all MDIO
devices and it's determined by how fast all devices are ready for
communication. This delay happens just before e.g. Ethernet PHY
type ID auto detection.
clock-frequency:
description:
Desired MDIO bus clock frequency in Hz. Values greater than IEEE 802.3