diff --git a/drivers/ptp/ptp_dte.c b/drivers/ptp/ptp_dte.c
index faf6f7a83713..6edd3b9c7f01 100644
--- a/drivers/ptp/ptp_dte.c
+++ b/drivers/ptp/ptp_dte.c
@@ -221,7 +221,7 @@ static int ptp_dte_enable(struct ptp_clock_info *ptp,
 	return -EOPNOTSUPP;
 }
 
-static struct ptp_clock_info ptp_dte_caps = {
+static const struct ptp_clock_info ptp_dte_caps = {
 	.owner		= THIS_MODULE,
 	.name		= "DTE PTP timer",
 	.max_adj	= 50000000,
diff --git a/drivers/ptp/ptp_ixp46x.c b/drivers/ptp/ptp_ixp46x.c
index 344a3bac210b..1171ffd210b3 100644
--- a/drivers/ptp/ptp_ixp46x.c
+++ b/drivers/ptp/ptp_ixp46x.c
@@ -236,7 +236,7 @@ static int ptp_ixp_enable(struct ptp_clock_info *ptp,
 	return -EOPNOTSUPP;
 }
 
-static struct ptp_clock_info ptp_ixp_caps = {
+static const struct ptp_clock_info ptp_ixp_caps = {
 	.owner		= THIS_MODULE,
 	.name		= "IXP46X timer",
 	.max_adj	= 66666655,
diff --git a/drivers/ptp/ptp_kvm.c b/drivers/ptp/ptp_kvm.c
index bb865695d7a6..2b1b212c219e 100644
--- a/drivers/ptp/ptp_kvm.c
+++ b/drivers/ptp/ptp_kvm.c
@@ -150,7 +150,7 @@ static int ptp_kvm_enable(struct ptp_clock_info *ptp,
 	return -EOPNOTSUPP;
 }
 
-static struct ptp_clock_info ptp_kvm_caps = {
+static const struct ptp_clock_info ptp_kvm_caps = {
 	.owner		= THIS_MODULE,
 	.name		= "KVM virtual PTP",
 	.max_adj	= 0,
diff --git a/drivers/ptp/ptp_pch.c b/drivers/ptp/ptp_pch.c
index 3aa22ae4d94c..b3285175f20f 100644
--- a/drivers/ptp/ptp_pch.c
+++ b/drivers/ptp/ptp_pch.c
@@ -509,7 +509,7 @@ static int ptp_pch_enable(struct ptp_clock_info *ptp,
 	return -EOPNOTSUPP;
 }
 
-static struct ptp_clock_info ptp_pch_caps = {
+static const struct ptp_clock_info ptp_pch_caps = {
 	.owner		= THIS_MODULE,
 	.name		= "PCH timer",
 	.max_adj	= 50000000,