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docs: net: dsa: add more info about the other arguments to get_tag_protocol

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Changes were made to the prototype of get_tag_protocol without
describing at a high level what they are about. Update the documentation
to explain that.

Fixes: 5ed4e3eb02 ("net: dsa: Pass a port to get_tag_protocol()")
Fixes: 4d776482ec ("net: dsa: Get information about stacked DSA protocol")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vladimir Oltean 2022-07-16 21:53:33 +03:00 committed by David S. Miller
parent c3f0e84d10
commit c56313a42a
1 changed files with 5 additions and 1 deletions
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6
Documentation/networking/dsa/dsa.rst
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@ -594,7 +594,11 @@ Switch configuration
--------------------
- ``get_tag_protocol``: this is to indicate what kind of tagging protocol is
supported, should be a valid value from the ``dsa_tag_protocol`` enum
supported, should be a valid value from the ``dsa_tag_protocol`` enum.
The returned information does not have to be static; the driver is passed the
CPU port number, as well as the tagging protocol of a possibly stacked
upstream switch, in case there are hardware limitations in terms of supported
tag formats.
- ``setup``: setup function for the switch, this function is responsible for setting
up the ``dsa_switch_ops`` private structure with all it needs: register maps,