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
---
Changes in v4: - describe "ranges" is required fo the alternate description
Changes in v3: - add "ranges" in the alternate example
doc/device-tree-bindings/net/fsl-tsec-phy.txt | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-)
diff --git a/doc/device-tree-bindings/net/fsl-tsec-phy.txt b/doc/device-tree-bindings/net/fsl-tsec-phy.txt index a44c5fd9d9..f68980352b 100644 --- a/doc/device-tree-bindings/net/fsl-tsec-phy.txt +++ b/doc/device-tree-bindings/net/fsl-tsec-phy.txt @@ -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).