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Diffstat (limited to 'drivers/net/dsa/mv88e6xxx/global1.c')
-rw-r--r--drivers/net/dsa/mv88e6xxx/global1.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/net/dsa/mv88e6xxx/global1.c b/drivers/net/dsa/mv88e6xxx/global1.c
index ca3a7a7a73c3..f62aa83ca08d 100644
--- a/drivers/net/dsa/mv88e6xxx/global1.c
+++ b/drivers/net/dsa/mv88e6xxx/global1.c
@@ -196,6 +196,23 @@ int mv88e6185_g1_ppu_disable(struct mv88e6xxx_chip *chip)
return mv88e6185_g1_wait_ppu_disabled(chip);
}
+int mv88e6185_g1_set_max_frame_size(struct mv88e6xxx_chip *chip, int mtu)
+{
+ u16 val;
+ int err;
+
+ err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_CTL1, &val);
+ if (err)
+ return err;
+
+ val &= ~MV88E6185_G1_CTL1_MAX_FRAME_1632;
+
+ if (mtu > 1518)
+ val |= MV88E6185_G1_CTL1_MAX_FRAME_1632;
+
+ return mv88e6xxx_g1_write(chip, MV88E6XXX_G1_CTL1, val);
+}
+
/* Offset 0x10: IP-PRI Mapping Register 0
* Offset 0x11: IP-PRI Mapping Register 1
* Offset 0x12: IP-PRI Mapping Register 2