+/**
+ * qmp_get() - get a qmp handle from a device
+ * @dev: client device pointer
+ *
+ * Return: handle to qmp device on success, ERR_PTR() on failure
+ */
+struct qmp *qmp_get(struct device *dev)
+{
+ struct platform_device *pdev;
+ struct device_node *np;
+ struct qmp *qmp;
+
+ if (!dev || !dev->of_node)
+ return ERR_PTR(-EINVAL);
+
+ np = of_parse_phandle(dev->of_node, "qcom,qmp", 0);
+ if (!np)
+ return ERR_PTR(-ENODEV);
+
+ pdev = of_find_device_by_node(np);
+ of_node_put(np);
+ if (!pdev)
+ return ERR_PTR(-EINVAL);
+
+ qmp = platform_get_drvdata(pdev);
+
+ return qmp ? qmp : ERR_PTR(-EPROBE_DEFER);
+}
+EXPORT_SYMBOL(qmp_get);
+
+/**
+ * qmp_put() - release a qmp handle
+ * @qmp: qmp handle obtained from qmp_get()
+ */
+void qmp_put(struct qmp *qmp)
+{
+ /*
+ * Match get_device() inside of_find_device_by_node() in
+ * qmp_get()
+ */
+ if (!IS_ERR_OR_NULL(qmp))
+ put_device(qmp->dev);
+}
+EXPORT_SYMBOL(qmp_put);
+