4d7902f22b
Stashing is only supported on the 85xx (e500-based) SoCs. The 83xx and 86xx chips don't have a proper cache for this. U-Boot has been updated to add stashing properties to the device tree nodes of gianfar devices on 85xx. So now we modify Linux to keep stashing off unless those properties are there. Signed-off-by: Andy Fleming <afleming@freescale.com> Signed-off-by: David S. Miller <davem@davemloft.net>
77 lines
2.9 KiB
Plaintext
77 lines
2.9 KiB
Plaintext
* MDIO IO device
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The MDIO is a bus to which the PHY devices are connected. For each
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device that exists on this bus, a child node should be created. See
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the definition of the PHY node in booting-without-of.txt for an example
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of how to define a PHY.
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Required properties:
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- reg : Offset and length of the register set for the device
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- compatible : Should define the compatible device type for the
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mdio. Currently, this is most likely to be "fsl,gianfar-mdio"
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Example:
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mdio@24520 {
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reg = <24520 20>;
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compatible = "fsl,gianfar-mdio";
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ethernet-phy@0 {
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......
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};
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};
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* TBI Internal MDIO bus
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As of this writing, every tsec is associated with an internal TBI PHY.
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This PHY is accessed through the local MDIO bus. These buses are defined
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similarly to the mdio buses, except they are compatible with "fsl,gianfar-tbi".
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The TBI PHYs underneath them are similar to normal PHYs, but the reg property
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is considered instructive, rather than descriptive. The reg property should
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be chosen so it doesn't interfere with other PHYs on the bus.
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* Gianfar-compatible ethernet nodes
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Properties:
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- device_type : Should be "network"
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- model : Model of the device. Can be "TSEC", "eTSEC", or "FEC"
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- compatible : Should be "gianfar"
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- reg : Offset and length of the register set for the device
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- local-mac-address : List of bytes representing the ethernet address of
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this controller
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- interrupts : For FEC devices, the first interrupt is the device's
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interrupt. For TSEC and eTSEC devices, the first interrupt is
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transmit, the second is receive, and the third is error.
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- phy-handle : The phandle for the PHY connected to this ethernet
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controller.
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- fixed-link : <a b c d e> where a is emulated phy id - choose any,
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but unique to the all specified fixed-links, b is duplex - 0 half,
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1 full, c is link speed - d#10/d#100/d#1000, d is pause - 0 no
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pause, 1 pause, e is asym_pause - 0 no asym_pause, 1 asym_pause.
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- phy-connection-type : a string naming the controller/PHY interface type,
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i.e., "mii" (default), "rmii", "gmii", "rgmii", "rgmii-id", "sgmii",
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"tbi", or "rtbi". This property is only really needed if the connection
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is of type "rgmii-id", as all other connection types are detected by
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hardware.
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- fsl,magic-packet : If present, indicates that the hardware supports
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waking up via magic packet.
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- bd-stash : If present, indicates that the hardware supports stashing
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buffer descriptors in the L2.
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- rx-stash-len : Denotes the number of bytes of a received buffer to stash
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in the L2.
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- rx-stash-idx : Denotes the index of the first byte from the received
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buffer to stash in the L2.
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Example:
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ethernet@24000 {
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device_type = "network";
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model = "TSEC";
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compatible = "gianfar";
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reg = <0x24000 0x1000>;
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local-mac-address = [ 00 E0 0C 00 73 00 ];
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interrupts = <29 2 30 2 34 2>;
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interrupt-parent = <&mpic>;
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phy-handle = <&phy0>
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};
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