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dt-bindings: net: Update Freescale TSEC to support "queue-group"

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At present the Freescale TSEC node DT bindings doc requires a <reg>
property in the TSEC node. But this might not always be the case.
In the upstream Linux kernel, there is no DT bindings doc for it
but the kernel driver tests a subnode of a name prefixed with
"queue-group", as we can see from gfar_of_init():

  for_each_available_child_of_node(np, child) {
      if (!of_node_name_eq(child, "queue-group"))
  ...

in drivers/net/ethernet/freescale/gianfar.c

Update our DT bindings to describe this alternate description.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
This commit is contained in:
Bin Meng 2021-03-14 20:15:00 +08:00 • committed by Priyanka Jain
parent 408f056e06
commit 05153702d3
1 changed files with 18 additions and 1 deletions
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19
doc/device-tree-bindings/net/fsl-tsec-phy.txt
View file

@ -3,12 +3,17 @@
Properties:
- compatible : Should be "fsl,etsec2" or "gianfar"
- reg : Offset and length of the register set for the device
- reg : Offset and length of the register set for the device. If this is
missing, a subnode with a name prefix "queue-group" must be provided to
provide the <reg> property.
- phy-handle : See ethernet.txt file in the same directory.
- phy-connection-type : See ethernet.txt file in the same directory. This
property is only really needed if the connection is of type "rgmii-id",
"rgmii-rxid" and "rgmii-txid" as all other connection types are detected
by hardware.
- ranges : an <empty> value if subnode "queue-group" is present, specifying
that no address translation is required between them TSEC parent node and
the child "queue-group" node.
Example:
ethernet@24000 {
@ -18,6 +23,18 @@ Example:
phy-connection-type = "sgmii";
};
An alternate description with "queue-group" subnode example:
ethernet@24000 {
compatible = "fsl,etsec2";
phy-handle = <&phy0>;
phy-connection-type = "sgmii";
ranges;
queue-group {
reg = <0x24000 0x1000>;
};
};
Child nodes of the TSEC controller are typically the individual PHY devices
connected via the MDIO bus (sometimes the MDIO bus controller is separate).