diff --git a/drivers/input/touchscreen/hideep.c b/drivers/input/touchscreen/hideep.c
index 84fbbf415c431..ddad4a82a5e55 100644
--- a/drivers/input/touchscreen/hideep.c
+++ b/drivers/input/touchscreen/hideep.c
@@ -811,8 +811,7 @@ static int hideep_init_input(struct hideep_ts *ts)
 	if (error)
 		return error;
 
-	ts->key_num = device_property_read_u32_array(dev, "linux,keycodes",
-						     NULL, 0);
+	ts->key_num = device_property_count_u32(dev, "linux,keycodes");
 	if (ts->key_num > HIDEEP_KEY_MAX) {
 		dev_err(dev, "too many keys defined: %d\n",
 			ts->key_num);