net: dsa: Add new binding implementation

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>

1 files changed, 5 insertions, 0 deletions

diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index 6c314f300424..ce3b942dce76 100644
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -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)