diff --git a/drivers/net/gmac_rockchip.c b/drivers/net/gmac_rockchip.c
index 4396ca1..5afc415 100644
--- a/drivers/net/gmac_rockchip.c
+++ b/drivers/net/gmac_rockchip.c
@@ -73,6 +73,41 @@ static int gmac_rockchip_ofdata_to_platdata(struct udevice *dev)
 	return designware_eth_ofdata_to_platdata(dev);
 }
 
+static int rk3228_gmac_fix_rmii_speed(struct gmac_rockchip_platdata *pdata,
+				      struct dw_eth_dev *priv)
+{
+	struct rk322x_grf *grf;
+	int clk;
+	enum {
+		RK3228_GMAC_RMII_CLK_MASK   = BIT(7),
+		RK3228_GMAC_RMII_CLK_2_5M   = 0,
+		RK3228_GMAC_RMII_CLK_25M    = BIT(7),
+
+		RK3228_GMAC_RMII_SPEED_MASK = BIT(2),
+		RK3228_GMAC_RMII_SPEED_10   = 0,
+		RK3228_GMAC_RMII_SPEED_100  = BIT(2),
+	};
+
+	switch (priv->phydev->speed) {
+	case 10:
+		clk = RK3228_GMAC_RMII_CLK_2_5M | RK3228_GMAC_RMII_SPEED_10;
+		break;
+	case 100:
+		clk = RK3228_GMAC_RMII_CLK_25M | RK3228_GMAC_RMII_SPEED_100;
+		break;
+	default:
+		debug("Unknown phy speed: %d\n", priv->phydev->speed);
+		return -EINVAL;
+	}
+
+	grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
+	rk_clrsetreg(&grf->mac_con[1],
+		     RK3228_GMAC_RMII_CLK_MASK | RK3228_GMAC_RMII_SPEED_MASK,
+		     clk);
+
+	return 0;
+}
+
 static int rk3228_gmac_fix_rgmii_speed(struct gmac_rockchip_platdata *pdata,
 				       struct dw_eth_dev *priv)
 {
@@ -134,6 +169,41 @@ static int rk3288_gmac_fix_rgmii_speed(struct gmac_rockchip_platdata *pdata,
 	return 0;
 }
 
+static int rk3328_gmac_fix_rmii_speed(struct gmac_rockchip_platdata *pdata,
+				      struct dw_eth_dev *priv)
+{
+	struct rk3328_grf_regs *grf;
+	int clk;
+	enum {
+		RK3328_GMAC_RMII_CLK_MASK   = BIT(7),
+		RK3328_GMAC_RMII_CLK_2_5M   = 0,
+		RK3328_GMAC_RMII_CLK_25M    = BIT(7),
+
+		RK3328_GMAC_RMII_SPEED_MASK = BIT(2),
+		RK3328_GMAC_RMII_SPEED_10   = 0,
+		RK3328_GMAC_RMII_SPEED_100  = BIT(2),
+	};
+
+	switch (priv->phydev->speed) {
+	case 10:
+		clk = RK3328_GMAC_RMII_CLK_2_5M | RK3328_GMAC_RMII_SPEED_10;
+		break;
+	case 100:
+		clk = RK3328_GMAC_RMII_CLK_25M | RK3328_GMAC_RMII_SPEED_100;
+		break;
+	default:
+		debug("Unknown phy speed: %d\n", priv->phydev->speed);
+		return -EINVAL;
+	}
+
+	grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
+	rk_clrsetreg(pdata->integrated_phy ? &grf->mac_con[2] : &grf->mac_con[1],
+		     RK3328_GMAC_RMII_CLK_MASK | RK3328_GMAC_RMII_SPEED_MASK,
+		     clk);
+
+	return 0;
+}
+
 static int rk3328_gmac_fix_rgmii_speed(struct gmac_rockchip_platdata *pdata,
 				       struct dw_eth_dev *priv)
 {
@@ -264,6 +334,28 @@ static int rv1108_gmac_fix_rmii_speed(struct gmac_rockchip_platdata *pdata,
 	return 0;
 }
 
+static void rk3228_gmac_set_to_rmii(struct gmac_rockchip_platdata *pdata)
+{
+	struct rk322x_grf *grf;
+	enum {
+		RK3228_GRF_CON_RMII_MODE_MASK = BIT(11),
+		RK3228_GRF_CON_RMII_MODE_SEL = BIT(11),
+		RK3228_RMII_MODE_MASK = BIT(10),
+		RK3228_RMII_MODE_SEL = BIT(10),
+		RK3228_GMAC_PHY_INTF_SEL_MASK  = GENMASK(6, 4),
+		RK3228_GMAC_PHY_INTF_SEL_RMII = BIT(6),
+	};
+
+	grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
+	rk_clrsetreg(&grf->mac_con[1],
+		     RK3228_GRF_CON_RMII_MODE_MASK |
+		     RK3228_RMII_MODE_MASK |
+		     RK3228_GMAC_PHY_INTF_SEL_MASK,
+		     RK3228_GRF_CON_RMII_MODE_SEL |
+		     RK3228_RMII_MODE_SEL |
+		     RK3228_GMAC_PHY_INTF_SEL_RMII);
+}
+
 static void rk3228_gmac_set_to_rgmii(struct gmac_rockchip_platdata *pdata)
 {
 	struct rk322x_grf *grf;
@@ -328,6 +420,25 @@ static void rk3288_gmac_set_to_rgmii(struct gmac_rockchip_platdata *pdata)
 		     pdata->tx_delay << RK3288_CLK_TX_DL_CFG_GMAC_SHIFT);
 }
 
+static void rk3328_gmac_set_to_rmii(struct gmac_rockchip_platdata *pdata)
+{
+	struct rk3328_grf_regs *grf;
+	enum {
+		RK3328_RMII_MODE_MASK  = BIT(9),
+		RK3328_RMII_MODE = BIT(9),
+
+		RK3328_GMAC_PHY_INTF_SEL_MASK  = GENMASK(6, 4),
+		RK3328_GMAC_PHY_INTF_SEL_RMII = BIT(6),
+	};
+
+	grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
+	rk_clrsetreg(pdata->integrated_phy ? &grf->mac_con[2] : &grf->mac_con[1],
+		     RK3328_RMII_MODE_MASK |
+		     RK3328_GMAC_PHY_INTF_SEL_MASK,
+		     RK3328_GMAC_PHY_INTF_SEL_RMII |
+		     RK3328_RMII_MODE);
+}
+
 static void rk3328_gmac_set_to_rgmii(struct gmac_rockchip_platdata *pdata)
 {
 	struct rk3328_grf_regs *grf;
@@ -551,7 +662,9 @@ const struct eth_ops gmac_rockchip_eth_ops = {
 };
 
 const struct rk_gmac_ops rk3228_gmac_ops = {
+	.fix_rmii_speed = rk3228_gmac_fix_rmii_speed,
 	.fix_rgmii_speed = rk3228_gmac_fix_rgmii_speed,
+	.set_to_rmii = rk3228_gmac_set_to_rmii,
 	.set_to_rgmii = rk3228_gmac_set_to_rgmii,
 };
 
@@ -561,7 +674,9 @@ const struct rk_gmac_ops rk3288_gmac_ops = {
 };
 
 const struct rk_gmac_ops rk3328_gmac_ops = {
+	.fix_rmii_speed = rk3328_gmac_fix_rmii_speed,
 	.fix_rgmii_speed = rk3328_gmac_fix_rgmii_speed,
+	.set_to_rmii = rk3328_gmac_set_to_rmii,
 	.set_to_rgmii = rk3328_gmac_set_to_rgmii,
 };
 
