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net: dsa: Add new binding implementation

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The existing DSA binding has a number of limitations and problems. The
main problem is that it cannot represent a switch as a linux device,
hanging off some bus. It is limited to one CPU port. The DSA platform
device is artificial, and does not really represent hardware.

Implement a new binding which can be embedded into any type of node on
a bus to represent one switch device, and its links to other switches.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrew Lunn 2016-06-04 21:17:07 +02:00 • committed by David S. Miller
parent b516d45323
commit 83c0afaec7
7 changed files with 694 additions and 4 deletions
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5
net/dsa/dsa.c
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@ -294,6 +294,7 @@ static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent)
}
dst->cpu_switch = index;
dst->cpu_port = i;
ds->cpu_port_mask |= 1 << i;
} else if (!strcmp(name, "dsa")) {
ds->dsa_port_mask |= 1 << i;
} else {
@ -492,6 +493,10 @@ static void dsa_switch_destroy(struct dsa_switch *ds)
if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port)))
continue;
dsa_cpu_dsa_destroy(ds->ports[port].dn);
/* Clearing a bit which is not set does no harm */
ds->cpu_port_mask |= ~(1 << port);
ds->dsa_port_mask |= ~(1 << port);
}
if (ds->slave_mii_bus && ds->drv->phy_read)