+	switch (val & LAN78XX_PHY_CTRL3_DOWNSHIFT_CTRL_MASK) {
+	case LAN78XX_PHY_CTRL3_DOWNSHIFT_CTRL_2:
+		*data = 2;
+		break;
+	case LAN78XX_PHY_CTRL3_DOWNSHIFT_CTRL_3:
+		*data = 3;
+		break;
+	case LAN78XX_PHY_CTRL3_DOWNSHIFT_CTRL_4:
+		*data = 4;
+		break;
+	case LAN78XX_PHY_CTRL3_DOWNSHIFT_CTRL_5:
+		*data = 5;
+		break;
+	}

+#define  LAN78XX_PHY_CTRL3_DOWNSHIFT_CTRL_2	(0 << 2)
+#define  LAN78XX_PHY_CTRL3_DOWNSHIFT_CTRL_3	(1 << 2)
+#define  LAN78XX_PHY_CTRL3_DOWNSHIFT_CTRL_4	(2 << 2)
+#define  LAN78XX_PHY_CTRL3_DOWNSHIFT_CTRL_5	(3 << 2)

It looks like you can replace the switch statement with a FIELD_GET() + 2.

    Andrew

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pw-bot: cr