v4.19.13 snapshot.
diff --git a/include/linux/of_device.h b/include/linux/of_device.h
new file mode 100644
index 0000000..165fd30
--- /dev/null
+++ b/include/linux/of_device.h
@@ -0,0 +1,120 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_OF_DEVICE_H
+#define _LINUX_OF_DEVICE_H
+
+#include <linux/cpu.h>
+#include <linux/platform_device.h>
+#include <linux/of_platform.h> /* temporary until merge */
+
+#include <linux/of.h>
+#include <linux/mod_devicetable.h>
+
+struct device;
+
+#ifdef CONFIG_OF
+extern const struct of_device_id *of_match_device(
+ const struct of_device_id *matches, const struct device *dev);
+
+/**
+ * of_driver_match_device - Tell if a driver's of_match_table matches a device.
+ * @drv: the device_driver structure to test
+ * @dev: the device structure to match against
+ */
+static inline int of_driver_match_device(struct device *dev,
+ const struct device_driver *drv)
+{
+ return of_match_device(drv->of_match_table, dev) != NULL;
+}
+
+extern struct platform_device *of_dev_get(struct platform_device *dev);
+extern void of_dev_put(struct platform_device *dev);
+
+extern int of_device_add(struct platform_device *pdev);
+extern int of_device_register(struct platform_device *ofdev);
+extern void of_device_unregister(struct platform_device *ofdev);
+
+extern const void *of_device_get_match_data(const struct device *dev);
+
+extern ssize_t of_device_modalias(struct device *dev, char *str, ssize_t len);
+extern int of_device_request_module(struct device *dev);
+
+extern void of_device_uevent(struct device *dev, struct kobj_uevent_env *env);
+extern int of_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env);
+
+static inline void of_device_node_put(struct device *dev)
+{
+ of_node_put(dev->of_node);
+}
+
+static inline struct device_node *of_cpu_device_node_get(int cpu)
+{
+ struct device *cpu_dev;
+ cpu_dev = get_cpu_device(cpu);
+ if (!cpu_dev)
+ return of_get_cpu_node(cpu, NULL);
+ return of_node_get(cpu_dev->of_node);
+}
+
+int of_dma_configure(struct device *dev,
+ struct device_node *np,
+ bool force_dma);
+void of_dma_deconfigure(struct device *dev);
+#else /* CONFIG_OF */
+
+static inline int of_driver_match_device(struct device *dev,
+ const struct device_driver *drv)
+{
+ return 0;
+}
+
+static inline void of_device_uevent(struct device *dev,
+ struct kobj_uevent_env *env) { }
+
+static inline const void *of_device_get_match_data(const struct device *dev)
+{
+ return NULL;
+}
+
+static inline int of_device_modalias(struct device *dev,
+ char *str, ssize_t len)
+{
+ return -ENODEV;
+}
+
+static inline int of_device_request_module(struct device *dev)
+{
+ return -ENODEV;
+}
+
+static inline int of_device_uevent_modalias(struct device *dev,
+ struct kobj_uevent_env *env)
+{
+ return -ENODEV;
+}
+
+static inline void of_device_node_put(struct device *dev) { }
+
+static inline const struct of_device_id *__of_match_device(
+ const struct of_device_id *matches, const struct device *dev)
+{
+ return NULL;
+}
+#define of_match_device(matches, dev) \
+ __of_match_device(of_match_ptr(matches), (dev))
+
+static inline struct device_node *of_cpu_device_node_get(int cpu)
+{
+ return NULL;
+}
+
+static inline int of_dma_configure(struct device *dev,
+ struct device_node *np,
+ bool force_dma)
+{
+ return 0;
+}
+static inline void of_dma_deconfigure(struct device *dev)
+{}
+#endif /* CONFIG_OF */
+
+#endif /* _LINUX_OF_DEVICE_H */