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authorFlorian Fainelli <f.fainelli@gmail.com>2018-04-25 22:12:51 +0300
committerDavid S. Miller <davem@davemloft.net>2018-04-27 18:53:03 +0300
commit6207a78c098a183df1620c1e2cbf620a4cc7c3e3 (patch)
tree356ad8023c0b4a18cc7a895267711fdf620472a3 /net/dsa
parent89f09048348936a9a8c5131c8538cc6ed26fd44c (diff)
downloadlinux-6207a78c098a183df1620c1e2cbf620a4cc7c3e3.tar.xz
net: dsa: Add helper function to obtain PHY device of a given port
In preparation for having more call sites attempting to obtain a reference against a PHY device corresponding to a particular port, introduce a helper function for that purpose. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dsa')
-rw-r--r--net/dsa/port.c33
1 files changed, 22 insertions, 11 deletions
diff --git a/net/dsa/port.c b/net/dsa/port.c
index 7acc1169d75e..5e2a88720a9a 100644
--- a/net/dsa/port.c
+++ b/net/dsa/port.c
@@ -273,25 +273,38 @@ int dsa_port_vlan_del(struct dsa_port *dp,
return 0;
}
-static int dsa_port_setup_phy_of(struct dsa_port *dp, bool enable)
+static struct phy_device *dsa_port_get_phy_device(struct dsa_port *dp)
{
- struct device_node *port_dn = dp->dn;
struct device_node *phy_dn;
- struct dsa_switch *ds = dp->ds;
struct phy_device *phydev;
- int port = dp->index;
- int err = 0;
- phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
+ phy_dn = of_parse_phandle(dp->dn, "phy-handle", 0);
if (!phy_dn)
- return 0;
+ return NULL;
phydev = of_phy_find_device(phy_dn);
if (!phydev) {
- err = -EPROBE_DEFER;
- goto err_put_of;
+ of_node_put(phy_dn);
+ return ERR_PTR(-EPROBE_DEFER);
}
+ return phydev;
+}
+
+static int dsa_port_setup_phy_of(struct dsa_port *dp, bool enable)
+{
+ struct dsa_switch *ds = dp->ds;
+ struct phy_device *phydev;
+ int port = dp->index;
+ int err = 0;
+
+ phydev = dsa_port_get_phy_device(dp);
+ if (!phydev)
+ return 0;
+
+ if (IS_ERR(phydev))
+ return PTR_ERR(phydev);
+
if (enable) {
err = genphy_config_init(phydev);
if (err < 0)
@@ -317,8 +330,6 @@ static int dsa_port_setup_phy_of(struct dsa_port *dp, bool enable)
err_put_dev:
put_device(&phydev->mdio.dev);
-err_put_of:
- of_node_put(phy_dn);
return err;
}