diff --git a/drivers/net/ethernet/cadence/macb.h b/drivers/net/ethernet/cadence/macb.h
index d8d87213697c..5620b97b3482 100644
--- a/drivers/net/ethernet/cadence/macb.h
+++ b/drivers/net/ethernet/cadence/macb.h
@@ -243,9 +243,11 @@
 #define MACB_NCR_TPF_SIZE	1
 #define MACB_TZQ_OFFSET		12 /* Transmit zero quantum pause frame */
 #define MACB_TZQ_SIZE		1
-#define MACB_SRTSM_OFFSET	15
-#define MACB_OSSMODE_OFFSET 24 /* Enable One Step Synchro Mode */
+#define MACB_SRTSM_OFFSET	15 /* Store Receive Timestamp to Memory */
+#define MACB_OSSMODE_OFFSET	24 /* Enable One Step Synchro Mode */
 #define MACB_OSSMODE_SIZE	1
+#define MACB_MIIONRGMII_OFFSET	28 /* MII Usage on RGMII Interface */
+#define MACB_MIIONRGMII_SIZE	1
 
 /* Bitfields in NCFGR */
 #define MACB_SPD_OFFSET		0 /* Speed */
@@ -713,6 +715,7 @@
 #define MACB_CAPS_GEM_HAS_PTP			0x00000040
 #define MACB_CAPS_BD_RD_PREFETCH		0x00000080
 #define MACB_CAPS_NEEDS_RSTONUBR		0x00000100
+#define MACB_CAPS_MIIONRGMII			0x00000200
 #define MACB_CAPS_CLK_HW_CHG			0x04000000
 #define MACB_CAPS_MACB_IS_EMAC			0x08000000
 #define MACB_CAPS_FIFO_MODE			0x10000000
diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index d13fb1d31821..e2730b3e1a57 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -684,6 +684,9 @@ static void macb_mac_config(struct phylink_config *config, unsigned int mode,
 		} else if (state->interface == PHY_INTERFACE_MODE_10GBASER) {
 			ctrl |= GEM_BIT(PCSSEL);
 			ncr |= GEM_BIT(ENABLE_HS_MAC);
+		} else if (bp->caps & MACB_CAPS_MIIONRGMII &&
+			   bp->phy_interface == PHY_INTERFACE_MODE_MII) {
+			ncr |= MACB_BIT(MIIONRGMII);
 		}
 	}
 
@@ -4594,7 +4597,8 @@ static const struct macb_config zynq_config = {
 };
 
 static const struct macb_config sama7g5_gem_config = {
-	.caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE | MACB_CAPS_CLK_HW_CHG,
+	.caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE | MACB_CAPS_CLK_HW_CHG |
+		MACB_CAPS_MIIONRGMII,
 	.dma_burst_length = 16,
 	.clk_init = macb_clk_init,
 	.init = macb_init,
@@ -4602,7 +4606,8 @@ static const struct macb_config sama7g5_gem_config = {
 };
 
 static const struct macb_config sama7g5_emac_config = {
-	.caps = MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII | MACB_CAPS_USRIO_HAS_CLKEN,
+	.caps = MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII |
+		MACB_CAPS_USRIO_HAS_CLKEN | MACB_CAPS_MIIONRGMII,
 	.dma_burst_length = 16,
 	.clk_init = macb_clk_init,
 	.init = macb_init,