From: Clark Wang <xiaoning.wang@nxp.com>
Date: Tue, 12 May 2026 03:26:30 +0000 (+0800)
Subject: net: fsl_enetc: fix the duplex setting on the iMX platform
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=11af22cd1e201882a7e5fa4a346f04b449f463d1;p=thirdparty%2Fu-boot.git

net: fsl_enetc: fix the duplex setting on the iMX platform

The iMX and LS platforms use different bits in the same register to
set duplex, but their logics are opposite.
The current settings will result in unexpected configurations in
RGMII mode.

Fixes: e6df2f5e22c6 ("net: fsl_enetc: Update enetc driver to support i.MX95")
Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
Signed-off-by: Alice Guo <alice.guo@nxp.com>
Reviewed-by: Tim Harvey <tharvey@gateworks.com>
---

diff --git a/drivers/net/fsl_enetc.c b/drivers/net/fsl_enetc.c
index 206f1a381bb..b07193e4e83 100644
--- a/drivers/net/fsl_enetc.c
+++ b/drivers/net/fsl_enetc.c
@@ -18,6 +18,7 @@
 #include <asm/io.h>
 #include <pci.h>
 #include <miiphy.h>
+#include <linux/bitfield.h>
 #include <linux/bug.h>
 #include <linux/delay.h>
 #include <linux/build_bug.h>
@@ -396,7 +397,7 @@ static int enetc_init_sgmii(struct udevice *dev)
 /* set up MAC for RGMII */
 static void enetc_init_rgmii(struct udevice *dev, struct phy_device *phydev)
 {
-	u32 old_val, val, dpx = 0;
+	u32 old_val, val = 0;
 
 	old_val = val = enetc_read_mac_port(dev, ENETC_PM_IF_MODE);
 
@@ -416,15 +417,14 @@ static void enetc_init_rgmii(struct udevice *dev, struct phy_device *phydev)
 		val |= ENETC_PM_IFM_SSP_10;
 	}
 
-	if (enetc_is_imx95(dev))
-		dpx = ENETC_PM_IFM_FULL_DPX_IMX;
+	if  (enetc_is_imx95(dev))
+		val = u32_replace_bits(val,
+				       phydev->duplex == DUPLEX_FULL ? 0 : 1,
+				       ENETC_PM_IFM_FULL_DPX_IMX);
 	else if (enetc_is_ls1028a(dev))
-		dpx = ENETC_PM_IFM_FULL_DPX_LS;
-
-	if (phydev->duplex == DUPLEX_FULL)
-		val |= dpx;
-	else
-		val &= ~dpx;
+		val = u32_replace_bits(val,
+				       phydev->duplex == DUPLEX_FULL ? 1 : 0,
+				       ENETC_PM_IFM_FULL_DPX_LS);
 
 	if (val == old_val)
 		return;