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net: dsa: bcm_sf2: Turn on PHY to allow successful registration

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[ Upstream commit c04a17d2a9 ]

We are binding to the PHY using the SF2 slave MDIO bus that we create,
binding involves reading the PHY's MII_PHYSID1/2 which won't be possible
if the PHY is turned off. Temporarily turn it on/off for the bus probing
to succeeed. This fixes unbind/bind problems where the port connecting
to that PHY would be in error since it could not connect to it.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Florian Fainelli 2018-11-06 15:15:16 -08:00 committed by Greg Kroah-Hartman
parent 2ac94b9e90
commit 5f2dc610eb
1 changed files with 4 additions and 0 deletions
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4
drivers/net/dsa/bcm_sf2.c
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@ -1099,12 +1099,16 @@ static int bcm_sf2_sw_probe(struct platform_device *pdev)
return ret;
}
bcm_sf2_gphy_enable_set(priv->dev->ds, true);
ret = bcm_sf2_mdio_register(ds);
if (ret) {
pr_err("failed to register MDIO bus\n");
return ret;
}
bcm_sf2_gphy_enable_set(priv->dev->ds, false);
ret = bcm_sf2_cfp_rst(priv);
if (ret) {
pr_err("failed to reset CFP\n");