On Wed, Sep 13, 2023 at 02:40:10PM +0530, MD Danish Anwar wrote: > In order to support half-duplex operation at 10M and 100M link speeds, the > PHY collision detection signal (COL) should be routed to ICSSG > GPIO pin (PRGx_PRU0/1_GPI10) so that firmware can detect collision signal > and apply the CSMA/CD algorithm applicable for half duplex operation. A DT > property, "ti,half-duplex-capable" is introduced for this purpose. If > board has PHY COL pin conencted to PRGx_PRU1_GPIO10, this DT property can > be added to eth node of ICSSG, MII port to support half duplex operation at > that port. > > Reviewed-by: Roger Quadros <rogerq@xxxxxxxxxx> > Signed-off-by: MD Danish Anwar <danishanwar@xxxxxx> Acked-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx> Thanks, Conor. > --- > Documentation/devicetree/bindings/net/ti,icssg-prueth.yaml | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/Documentation/devicetree/bindings/net/ti,icssg-prueth.yaml b/Documentation/devicetree/bindings/net/ti,icssg-prueth.yaml > index 836d2d60e87d..229c8f32019f 100644 > --- a/Documentation/devicetree/bindings/net/ti,icssg-prueth.yaml > +++ b/Documentation/devicetree/bindings/net/ti,icssg-prueth.yaml > @@ -107,6 +107,13 @@ properties: > phandle to system controller node and register offset > to ICSSG control register for RGMII transmit delay > > + ti,half-duplex-capable: > + type: boolean > + description: > + Indicates that the PHY output pin COL is routed to ICSSG GPIO pin > + (PRGx_PRU0/1_GPIO10) as input so that the ICSSG MII port is > + capable of half duplex operations. > + > required: > - reg > anyOf: > -- > 2.34.1 >
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