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doc: bindings: Aquantia PHY node binding

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A couple of optional properties have been introduced for Aquantia PHY
allowing the driver to set up wiring related configuration points that
are otherwise driven by firmware.

Signed-off-by: Alex Marginean <alexandru.marginean@nxp.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
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Alex Marginean 2019-11-14 18:28:37 +02:00 committed by Joe Hershberger
parent e81031c2b8
commit ee278acdf1
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doc/device-tree-bindings/net/aquantia-phy.txt Normal file
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PHY nodes for Aquantia devices.
This text describes properties that are applicable to Aquantia PHY nodes in
addition to the bindings in phy.txt.
Aquantia PHYs allow some flexibility in the way they are wired in a system,
they allow MDI pins to be reversed, LEDs linked up in different weays, have an
I2C slave interface that can be used for debug. Normally the configuration
corresponding to these is driven by the PHY firmware with the downside that
a custom firmware is needed for each integration of a PHY.
Several optional bindings are defined that allow these configuration points to
be driven by the PHY driver and reduce dependency on specific FW versions.
Optional properties:
mdi-reversal: 0 or 1 indicating that reversal must be disabled/enabled.
Firmware default is used if the property is missing.
smb-addr: I2C/SMBus address to use, firmware default is used if the property
is missing.
Example node:
phy@00 {
reg = <0x00>;
mdi-reversal = <1>;
smb-addr = <0x25>;
};