diff --git a/target/linux/realtek/files-6.12/drivers/net/pcs/pcs-rtl-otto.c b/target/linux/realtek/files-6.12/drivers/net/pcs/pcs-rtl-otto.c
index 6a88b8c766..72b37ba8e2 100644
--- a/target/linux/realtek/files-6.12/drivers/net/pcs/pcs-rtl-otto.c
+++ b/target/linux/realtek/files-6.12/drivers/net/pcs/pcs-rtl-otto.c
@@ -92,16 +92,48 @@ static int rtpcs_sds_read(struct rtpcs_ctrl *ctrl, int sds, int page, int regnum
 	return mdiobus_c45_read(ctrl->bus, sds, MDIO_MMD_VEND1, mmd_regnum);
 }
 
-/*
- * For later use, when the SerDes registers need to be written ...
- *
- * static int rtpcs_sds_write(struct rtpcs_ctrl *ctrl, int sds, int page, int regnum, u16 value)
- * {
- *	int mmd_regnum = rtpcs_sds_to_mmd(page, regnum);
- *
- *	return mdiobus_c45_write(ctrl->bus, sds, MDIO_MMD_VEND1, mmd_regnum, value);
- * }
- */
+__attribute__((unused))
+static int rtpcs_sds_read_bits(struct rtpcs_ctrl *ctrl, int sds, int page,
+			       int regnum, int bithigh, int bitlow)
+{
+	int mask, val;
+
+	WARN_ON(bithigh < bitlow);
+
+	mask = GENMASK(bithigh, bitlow);
+	val = rtpcs_sds_read(ctrl, sds, page, regnum);
+	if (val < 0)
+		return val;
+
+	return (val & mask) >> bitlow;
+}
+
+__attribute__((unused))
+static int rtpcs_sds_write(struct rtpcs_ctrl *ctrl, int sds, int page, int regnum, u16 value)
+{
+	int mmd_regnum = rtpcs_sds_to_mmd(page, regnum);
+
+	return mdiobus_c45_write(ctrl->bus, sds, MDIO_MMD_VEND1, mmd_regnum, value);
+}
+
+__attribute__((unused))
+static int rtpcs_sds_write_bits(struct rtpcs_ctrl *ctrl, int sds, int page,
+				int regnum, int bithigh, int bitlow, u16 value)
+{
+	int mask, reg;
+
+	WARN_ON(bithigh < bitlow);
+
+	mask = GENMASK(bithigh, bitlow);
+	reg = rtpcs_sds_read(ctrl, sds, page, regnum);
+	if (reg < 0)
+		return reg;
+
+	reg = (reg & ~mask);
+	reg |= (value << bitlow) & mask;
+
+	return rtpcs_sds_write(ctrl, sds, page, regnum, reg);
+}
 
 static int rtpcs_sds_modify(struct rtpcs_ctrl *ctrl, int sds, int page, int regnum,
 			    u16 mask, u16 set)
@@ -476,4 +508,4 @@ module_platform_driver(rtpcs_driver);
 
 MODULE_AUTHOR("Markus Stockhausen <markus.stockhausen@gmx.de>");
 MODULE_DESCRIPTION("Realtek Otto SerDes PCS driver");
-MODULE_LICENSE("GPL v2");
\ No newline at end of file
+MODULE_LICENSE("GPL v2");