centos man page for struct_key_entry

STRUCT 
KEY_ENTRY(9)						  Input Subsystem					       STRUCT KEY_ENTRY(9)

NAME
       struct_key_entry - keymap entry for use in sparse keymap

SYNOPSIS
       struct key_entry {
	 int type;
	 u32 code;
	 union {unnamed_union};
       };

MEMBERS
       type
	   Type of the key entry (KE_KEY, KE_SW, KE_VSW, KE_END); drivers are allowed to extend the list with their own private definitions.

       code
	   Device-specific data identifying the button/switch

       {unnamed_union}
	   anonymous

DESCRIPTION
       This structure defines an entry in a sparse keymap used by some input devices for which traditional table-based approach is not suitable.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						       STRUCT KEY_ENTRY(9)