[PATCH 3/3] net/axgbe: Add support for 100Mbps link speed

[Ashok Kumar Natarajan]

Add 100Mbps link speed support to the axgbe driver. This update enables
the MAC and PHY configuration required to operate at 100M, including
proper mode selection and link handling.

Signed-off-by: Ashok Kumar Natarajan <ashokkumar.natarajan at amd.com>
---
 drivers/net/axgbe/axgbe_mdio.c     |  4 ++--
 drivers/net/axgbe/axgbe_phy_impl.c | 15 +++++++++++++++
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/drivers/net/axgbe/axgbe_mdio.c b/drivers/net/axgbe/axgbe_mdio.c
index 952a0add62..a37cd8b80d 100644
--- a/drivers/net/axgbe/axgbe_mdio.c
+++ b/drivers/net/axgbe/axgbe_mdio.c
@@ -155,8 +155,8 @@ static void axgbe_sgmii_10_mode(struct axgbe_port *pdata)
 static void axgbe_sgmii_100_mode(struct axgbe_port *pdata)
 {
 
-	/* Set MAC to 1G speed */
-	pdata->hw_if.set_speed(pdata, SPEED_1000);
+	/* Set MAC to 100M speed */
+	pdata->hw_if.set_speed(pdata, SPEED_100);
 
 	/* Call PHY implementation support to complete rate change */
 	pdata->phy_if.phy_impl.set_mode(pdata, AXGBE_MODE_SGMII_100);
diff --git a/drivers/net/axgbe/axgbe_phy_impl.c b/drivers/net/axgbe/axgbe_phy_impl.c
index 20cfdcc796..3dbbee15b0 100644
--- a/drivers/net/axgbe/axgbe_phy_impl.c
+++ b/drivers/net/axgbe/axgbe_phy_impl.c
@@ -1534,6 +1534,18 @@ static void axgbe_phy_sgmii_1000_mode(struct axgbe_port *pdata)
 	phy_data->cur_mode = AXGBE_MODE_SGMII_1000;
 }
 
+static void axgbe_phy_sgmii_100_mode(struct axgbe_port *pdata)
+{
+	struct axgbe_phy_data *phy_data = pdata->phy_data;
+
+	axgbe_phy_set_redrv_mode(pdata);
+
+	/* 100M/SGMII */
+	axgbe_phy_perform_ratechange(pdata, AXGBE_MB_CMD_SET_1G, AXGBE_MB_SUBCMD_100MBITS);
+
+	phy_data->cur_mode = AXGBE_MODE_SGMII_100;
+}
+
 static void axgbe_phy_sgmii_10_mode(struct axgbe_port *pdata)
 {
 	struct axgbe_phy_data *phy_data = pdata->phy_data;
@@ -1731,6 +1743,9 @@ static void axgbe_phy_set_mode(struct axgbe_port *pdata, enum axgbe_mode mode)
 	case AXGBE_MODE_SGMII_1000:
 		axgbe_phy_sgmii_1000_mode(pdata);
 		break;
+	case AXGBE_MODE_SGMII_100:
+		axgbe_phy_sgmii_100_mode(pdata);
+		break;
 	case AXGBE_MODE_SGMII_10:
 		axgbe_phy_sgmii_10_mode(pdata);
 		break;
-- 
2.34.1