cpsw: add a DT field for the cpts offset

Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index 588f5c3..f1af5e0 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -912,6 +912,13 @@
 	}
 	data->hw_stats_reg_ofs = prop;
 
+	if (of_property_read_u32(node, "cpts_reg_ofs", &prop)) {
+		pr_err("Missing cpts_reg_ofs property in the DT.\n");
+		ret = -EINVAL;
+		goto error_ret;
+	}
+	data->cpts_reg_ofs = prop;
+
 	if (of_property_read_u32(node, "bd_ram_ofs", &prop)) {
 		pr_err("Missing bd_ram_ofs property in the DT.\n");
 		ret = -EINVAL;