net: renesas: rswitch: Add "max-speed" handling

The previous code set the speed by the interface mode of PHY.
Also this hardware has a restriction which cannot change the speed
at runtime. To use other speed, add "max-speed" handling to set
each port's speed if needed.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/renesas/rswitch.c b/drivers/net/ethernet/renesas/rswitch.c
index f1a0dd1098f96d66c0819814775566eeab558ed7..50b61a0a7f535d715dfce4ca2ee00bda766ec30b 100644 (file)
--- a/drivers/net/ethernet/renesas/rswitch.c
+++ b/drivers/net/ethernet/renesas/rswitch.c
@@ -1072,13 +1072,23 @@ out:
 
 static int rswitch_etha_get_params(struct rswitch_device *rdev)
 {
+       u32 max_speed;
        int err;
 
        if (!rdev->np_port)
                return 0;       /* ignored */
 
        err = of_get_phy_mode(rdev->np_port, &rdev->etha->phy_interface);
+       if (err)
+               return err;
+
+       err = of_property_read_u32(rdev->np_port, "max-speed", &max_speed);
+       if (!err) {
+               rdev->etha->speed = max_speed;
+               return 0;
+       }
 
+       /* if no "max-speed" property, let's use default speed */
        switch (rdev->etha->phy_interface) {
        case PHY_INTERFACE_MODE_MII:
                rdev->etha->speed = SPEED_100;
@@ -1090,11 +1100,10 @@ static int rswitch_etha_get_params(struct rswitch_device *rdev)
                rdev->etha->speed = SPEED_2500;
                break;
        default:
-               err = -EINVAL;
-               break;
+               return -EINVAL;
        }
 
-       return err;
+       return 0;
 }
 
 static int rswitch_mii_register(struct rswitch_device *rdev)