Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index 1a9f38f..f268840 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -1,11 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * platform_device.h - generic, centralized driver model
  *
  * Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org>
  *
- * This file is released under the GPLv2
- *
- * See Documentation/driver-model/ for more information.
+ * See Documentation/driver-api/driver-model/ for more information.
  */
 
 #ifndef _PLATFORM_DEVICE_H_
@@ -25,6 +24,7 @@
 	int		id;
 	bool		id_auto;
 	struct device	dev;
+	u64		dma_mask;
 	u32		num_resources;
 	struct resource	*resource;
 
@@ -40,6 +40,7 @@
 
 #define platform_get_device_id(pdev)	((pdev)->id_entry)
 
+#define dev_is_platform(dev) ((dev)->bus == &platform_bus_type)
 #define to_platform_device(x) container_of((x), struct platform_device, dev)
 
 extern int platform_device_register(struct platform_device *);
@@ -48,20 +49,29 @@
 extern struct bus_type platform_bus_type;
 extern struct device platform_bus;
 
-extern void arch_setup_pdev_archdata(struct platform_device *);
 extern struct resource *platform_get_resource(struct platform_device *,
 					      unsigned int, unsigned int);
+extern struct device *
+platform_find_device_by_driver(struct device *start,
+			       const struct device_driver *drv);
+extern void __iomem *
+devm_platform_ioremap_resource(struct platform_device *pdev,
+			       unsigned int index);
 extern int platform_get_irq(struct platform_device *, unsigned int);
+extern int platform_get_irq_optional(struct platform_device *, unsigned int);
 extern int platform_irq_count(struct platform_device *);
 extern struct resource *platform_get_resource_byname(struct platform_device *,
 						     unsigned int,
 						     const char *);
 extern int platform_get_irq_byname(struct platform_device *, const char *);
+extern int platform_get_irq_byname_optional(struct platform_device *dev,
+					    const char *name);
 extern int platform_add_devices(struct platform_device **, int);
 
 struct platform_device_info {
 		struct device *parent;
 		struct fwnode_handle *fwnode;
+		bool of_node_reused;
 
 		const char *name;
 		int id;