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net: dsa: allow for more complex PHY setups

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Modify the DSA slave interface to be bound to an arbitray PHY, not just
the ones that are available as child PHY devices of the switch MDIO bus.

This allows us for instance to have external PHYs connected to a
separate MDIO bus, but yet also connected to a given switch port.

Under certain configurations, the physical port mask might not be a 1:1
mapping to the MII PHYs mask. This is the case, if e.g: Port 1 of the
switch is used and connects to a PHY at a MDIO address different than 1.

Introduce a phys_mii_mask variable which allows driver to implement and
divert their own MDIO read/writes operations for a subset of the MDIO
PHY addresses.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2014-08-27 17:04:51 -07:00 • committed by David S. Miller
parent bd47497a01
commit 0d8bcdd383
4 changed files with 83 additions and 3 deletions
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5
net/dsa/dsa.c
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@ -144,6 +144,11 @@ dsa_switch_setup(struct dsa_switch_tree *dst, int index,
goto out;
}
/* Make the built-in MII bus mask match the number of ports,
* switch drivers can override this later
*/
ds->phys_mii_mask = ds->phys_port_mask;
/*
* If the CPU connects to this switch, set the switch tree
* tagging protocol to the preferred tagging format of this