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-rw-r--r--drivers/net/dsa/mv88e6xxx/serdes.c22
1 files changed, 17 insertions, 5 deletions
diff --git a/drivers/net/dsa/mv88e6xxx/serdes.c b/drivers/net/dsa/mv88e6xxx/serdes.c
index f3c01119b3d1..4487d18132a4 100644
--- a/drivers/net/dsa/mv88e6xxx/serdes.c
+++ b/drivers/net/dsa/mv88e6xxx/serdes.c
@@ -55,18 +55,30 @@ static int mv88e6352_serdes_power_set(struct mv88e6xxx_chip *chip, bool on)
return err;
}
-int mv88e6352_serdes_power(struct mv88e6xxx_chip *chip, int port, bool on)
+static bool mv88e6352_port_has_serdes(struct mv88e6xxx_chip *chip, int port)
{
- int err;
u8 cmode;
+ int err;
err = mv88e6xxx_port_get_cmode(chip, port, &cmode);
- if (err)
- return err;
+ if (err) {
+ dev_err(chip->dev, "failed to read cmode\n");
+ return 0;
+ }
if ((cmode == MV88E6XXX_PORT_STS_CMODE_100BASE_X) ||
(cmode == MV88E6XXX_PORT_STS_CMODE_1000BASE_X) ||
- (cmode == MV88E6XXX_PORT_STS_CMODE_SGMII)) {
+ (cmode == MV88E6XXX_PORT_STS_CMODE_SGMII))
+ return 1;
+
+ return 0;
+}
+
+int mv88e6352_serdes_power(struct mv88e6xxx_chip *chip, int port, bool on)
+{
+ int err;
+
+ if (mv88e6352_port_has_serdes(chip, port)) {
err = mv88e6352_serdes_power_set(chip, on);
if (err < 0)
return err;