+static const int rx_clock_skew_val[] = {0x2, 0x0};

+static int dwc_eqos_setup_rxclock(struct platform_device *pdev, int ins_num)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct regmap *syscon;
+	unsigned int reg;
+
+	if (np && of_property_read_bool(np, "fsd-rx-clock-skew")) {
+		syscon = syscon_regmap_lookup_by_phandle_args(np,
+							      "fsd-rx-clock-skew",
+							      1, &reg);
+		if (IS_ERR(syscon)) {
+			dev_err(&pdev->dev,
+				"couldn't get the rx-clock-skew syscon!\n");
+			return PTR_ERR(syscon);
+		}
+
+		regmap_write(syscon, reg, rx_clock_skew_val[ins_num]);

Please could you explain what this is doing.

       Andrew

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