diff options
| author | MD Danish Anwar <danishanwar@ti.com> | 2023-09-13 12:10:10 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-09-15 15:54:34 +0300 |
| commit | 927c568d62128f48d6646d6df801c1ae25cf139f (patch) | |
| tree | 2191531db586b3bbb8008017646dd722e66b0e10 | |
| parent | 7c192ce9ff1d93f004fa6cdc0f567f5ab3dd4feb (diff) | |
| download | linux-927c568d62128f48d6646d6df801c1ae25cf139f.tar.xz | |
dt-bindings: net: Add documentation for Half duplex support.
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@kernel.org>
Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | Documentation/devicetree/bindings/net/ti,icssg-prueth.yaml | 7 |
1 files changed, 7 insertions, 0 deletions
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: |