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docs: net: dsa: document change_tag_protocol 

Support for changing the tagging protocol was added without this
operation being documented; do so now.

Fixes: 53da0ebaad ("net: dsa: allow changing the tag protocol via the "tagging" device attribute")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
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 21:53:34 +03:00 committed by David S. Miller
parent c56313a42a
commit d6a0336add
1 changed files with 6 additions and 0 deletions
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6
Documentation/networking/dsa/dsa.rst
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@ -600,6 +600,12 @@ Switch configuration
upstream switch, in case there are hardware limitations in terms of supported
tag formats.
- ``change_tag_protocol``: when the default tagging protocol has compatibility
problems with the master or other issues, the driver may support changing it
at runtime, either through a device tree property or through sysfs. In that
case, further calls to ``get_tag_protocol`` should report the protocol in
current use.
- ``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,
interrupts, mutexes, locks, etc. This function is also expected to properly