--- zzzz-none-000/linux-3.10.107/Documentation/driver-model/platform.txt	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/Documentation/driver-model/platform.txt	2021-02-04 17:41:59.000000000 +0000
@@ -48,7 +48,7 @@
 	struct device_driver driver;
 };
 
-Note that probe() should general verify that the specified device hardware
+Note that probe() should in general verify that the specified device hardware
 actually exists; sometimes platform setup code can't be sure.  The probing
 can use device resources, including clocks, and device platform_data.
 
@@ -63,6 +63,20 @@
 	int platform_driver_probe(struct platform_driver *drv,
 			  int (*probe)(struct platform_device *))
 
+Kernel modules can be composed of several platform drivers. The platform core
+provides helpers to register and unregister an array of drivers:
+
+	int __platform_register_drivers(struct platform_driver * const *drivers,
+				      unsigned int count, struct module *owner);
+	void platform_unregister_drivers(struct platform_driver * const *drivers,
+					 unsigned int count);
+
+If one of the drivers fails to register, all drivers registered up to that
+point will be unregistered in reverse order. Note that there is a convenience
+macro that passes THIS_MODULE as owner parameter:
+
+	#define platform_register_driver(drivers, count)
+
 
 Device Enumeration
 ~~~~~~~~~~~~~~~~~~