diff options
| author | Florian Fainelli <f.fainelli@gmail.com> | 2016-06-10 01:23:54 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-06-10 05:21:29 (GMT) |
| commit | 0830c9802e33d8c94b9b2f89b3db4aae92e55bf6 (patch) | |
| tree | 2c7e52741cf7856c59c1b2535737ce3ef288fac8 /drivers | |
| parent | 967dd82ffc52e9d8ea0defde094f9a39a3f4eeed (diff) | |
| download | linux-0830c9802e33d8c94b9b2f89b3db4aae92e55bf6.tar.xz | |
net: dsa: b53: Add BCM7445 quirk
The Broadcom BCM7445 STB chip has an issued in its revision D0 which was
previously worked around in drivers/net/dsa/bcm_sf2.c where we may
end-up double programming the integrated BCM7445 switch (bcm_sf2) and an
external Broadcom switch such as BCM53125, since these are mostly
register compatible.
Add a small quirk which just defers probing until we are sitting on the
slave DSA MDIO bus, which will allow us to intercept reads/writes and
funnel them through the SF2 internal MDIO master (which happens to
disconnect its pseudo PHY).
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/dsa/b53/b53_mdio.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/net/dsa/b53/b53_mdio.c b/drivers/net/dsa/b53/b53_mdio.c index c6cf7cf..aa87c3f 100644 --- a/drivers/net/dsa/b53/b53_mdio.c +++ b/drivers/net/dsa/b53/b53_mdio.c @@ -316,6 +316,17 @@ static int b53_mdio_probe(struct mdio_device *mdiodev) return -ENODEV; } + /* First probe will come from SWITCH_MDIO controller on the 7445D0 + * switch, which will conflict with the 7445 integrated switch + * pseudo-phy (we end-up programming both). In that case, we return + * -EPROBE_DEFER for the first time we get here, and wait until we come + * back with the slave MDIO bus which has the correct indirection + * layer setup + */ + if (of_machine_is_compatible("brcm,bcm7445d0") && + strcmp(mdiodev->bus->name, "sf2 slave mii")) + return -EPROBE_DEFER; + dev = b53_switch_alloc(&mdiodev->dev, &b53_mdio_ops, mdiodev->bus); if (!dev) return -ENOMEM; |