diff --git a/drivers/net/wan/fsl_ucc_hdlc.c b/drivers/net/wan/fsl_ucc_hdlc.c
index bb52c4dcf22c59a71b25f340f71dabeb62680cda..4545c782ef4e7e7b031616febaf9149b7b62b759 100644
--- a/drivers/net/wan/fsl_ucc_hdlc.c
+++ b/drivers/net/wan/fsl_ucc_hdlc.c
@@ -97,6 +97,12 @@ static int uhdlc_init(struct ucc_hdlc_private *priv)
 	if (priv->tsa) {
 		uf_info->tsa = 1;
 		uf_info->ctsp = 1;
+		uf_info->cds = 1;
+		uf_info->ctss = 1;
+	} else {
+		uf_info->cds = 0;
+		uf_info->ctsp = 0;
+		uf_info->ctss = 0;
 	}
 
 	/* This sets HPM register in CMXUCR register which configures a