diff --git a/drivers/s390/crypto/ap_card.c b/drivers/s390/crypto/ap_card.c
index bf1e964b00484a69c489d8f5d5fd9c90bf093957..d98bdd28d23edd6417171e822c4c91a6282d3cc5 100644
--- a/drivers/s390/crypto/ap_card.c
+++ b/drivers/s390/crypto/ap_card.c
@@ -12,6 +12,7 @@
 #include <linux/init.h>
 #include <linux/slab.h>
 #include <asm/facility.h>
+#include <asm/sclp.h>
 
 #include "ap_bus.h"
 
@@ -147,7 +148,29 @@ static ssize_t config_show(struct device *dev,
 	return scnprintf(buf, PAGE_SIZE, "%d\n", ac->config ? 1 : 0);
 }
 
-static DEVICE_ATTR_RO(config);
+static ssize_t config_store(struct device *dev,
+			    struct device_attribute *attr,
+			    const char *buf, size_t count)
+{
+	int rc = 0, cfg;
+	struct ap_card *ac = to_ap_card(dev);
+
+	if (sscanf(buf, "%d\n", &cfg) != 1 || cfg < 0 || cfg > 1)
+		return -EINVAL;
+
+	if (cfg && !ac->config)
+		rc = sclp_ap_configure(ac->id);
+	else if (!cfg && ac->config)
+		rc = sclp_ap_deconfigure(ac->id);
+	if (rc)
+		return rc;
+
+	ac->config = cfg ? true : false;
+
+	return count;
+}
+
+static DEVICE_ATTR_RW(config);
 
 static struct attribute *ap_card_dev_attrs[] = {
 	&dev_attr_hwtype.attr,