[PATCH] net: phy: Add missing RGMII internal delay cases to vsc8541_config

["Shimizu, Ryan" <Ryan.Shimizu@viasat.com>]

Currently, vsc8541_config does not account for cases where RGMII
mode with internal delays on TX, RX or both are selected, even though
the device supports that functionality. Instead, it returns an
error when "rgmii-id", "rgmii-txid" or "rgmii-rxid" is selected
in its corresponding DT node.

Fix by adding missing RGMII internal delay modes to list of
fall-through cases so that when configured with modes "rgmii-id",
"rgmii-txid" or "rgmii-rxid", the internal delay registers get
updated correctly in vsc8531_vsc8541_clk_skew_config().

Signed-off-by: Ryan Shimizu <ryan.shimizu@viasat.com>
---

 drivers/net/phy/mscc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/phy/mscc.c b/drivers/net/phy/mscc.c
index bd9cd95297..7263887b9c 100644
--- a/drivers/net/phy/mscc.c
+++ b/drivers/net/phy/mscc.c
@@ -1371,6 +1371,9 @@ static int vsc8541_config(struct phy_device *phydev)
        case PHY_INTERFACE_MODE_GMII:
        case PHY_INTERFACE_MODE_RMII:
        case PHY_INTERFACE_MODE_RGMII:
+       case PHY_INTERFACE_MODE_RGMII_TXID:
+       case PHY_INTERFACE_MODE_RGMII_RXID:
+       case PHY_INTERFACE_MODE_RGMII_ID:
                retval = vsc8531_vsc8541_mac_config(phydev);
                if (retval != 0)
                        return retval;
--
2.34.1