/dev/input目录下的事件都是在驱动中调用input_register_device(struct input_dev *dev)产生的。如我的盒子的/dev/input目录的内容如下：
[cpp] view plain copy crw-rw---- root input 13, 64 1970-01-01 08:00 event0 crw-rw---- root input 13, 65 1970-01-01 08:00 event1 crw-rw---- root input 13, 66 1970-01-01 08:00 event2 crw-rw---- root input 13, 67 1970-01-01 08:00 event3 crw-rw---- root input 13, 68 1970-01-01 08:00 event4 crw-rw---- root input 13, 69 1970-01-01 08:00 event5 crw-rw---- root input 13, 70 2013-08-30 09:56 event6 每个event将上报指定的事件，如G-Sensor、触摸屏、Mouse、按键等。与event对应的相关设备信息位于/proc/bus/input/devices，例子如下：
[cpp] view plain copy root@android:/ # cat /proc/bus/input/devices cat /proc/bus/input/devices I: Bus=0019 Vendor=0001 Product=0001 Version=0100 N: Name="rk29-keypad" P: Phys=gpio-keys/input0 S: Sysfs=/devices/platform/rk29-keypad/input/input0 U: Uniq= H: Handlers=kbd event0 keychord B: PROP=0 B: EV=3 B: KEY=8000 100000 0 0 0 I: Bus=0019 Vendor=0001 Product=0001 Version=0100 N: Name="rkxx-remotectl" P: Phys=gpio-keys/input0 S: Sysfs=/devices/platform/rkxx-remotectl/input/input1 U: Uniq= H: Handlers=kbd event1 keychord B: PROP=0 B: EV=3 B: KEY=c 70110 260000 0 0 0 20100 2000000 7800000 4000a800 1e16c0 19 78000000 10006ffc I: Bus=0003 Vendor=0c45 Product=1109 Version=0100 N: Name="coocaa Device coocaa Wireless Device" P: Phys=usb-usb20_host-1.3/input2 S: Sysfs=/devices/platform/usb20_host/usb2/2-1/2-1.3/2-1.3:1.2/input/input2 U: Uniq= H: Handlers=sysrq kbd event2 keychord B: PROP=0 B: EV=12001b B: KEY=10000 7 ff800000 7ff febeffdf ffefffff ffffffff fffffffe B: ABS=700 0 B: MSC=10 B: LED=1f I: Bus=0003 Vendor=0c45 Product=1109 Version=0100 N: Name="coocaa Device coocaa Wireless Device" P: Phys=usb-usb20_host-1.3/input3 S: Sysfs=/devices/platform/usb20_host/usb2/2-1/2-1.3/2-1.3:1.3/input/input3 U: Uniq= H: Handlers=sysrq kbd event3 keychord B: PROP=0 B: EV=12001f B: KEY=4837fff 72ff32d bf544446 0 0 1 30f90 8b17c007 ffe77bfa d941dfff febeffdf ffefffff ffffffff fffffffe B: REL=40 B: ABS=ffffff01 0 B: MSC=10 B: LED=1f I: Bus=0003 Vendor=0c45 Product=1109 Version=0100 N: Name="coocaa Device coocaa Wireless Device" P: Phys=usb-usb20_host-1.3/input4 S: Sysfs=/devices/platform/usb20_host/usb2/2-1/2-1.3/2-1.3:1.4/input/input4 U: Uniq= H: Handlers=event4 B: PROP=0 B: EV=17 B: KEY=1f0000 0 0 0 0 0 0 0 0 B: REL=103 B: MSC=10 I: Bus=0003 Vendor=0c45 Product=1109 Version=0100 N: Name="coocaa Device coocaa Wireless Device" P: Phys=usb-usb20_host-1.3/input5 S: Sysfs=/devices/platform/usb20_host/usb2/2-1/2-1.3/2-1.3:1.5/input/input5 U: Uniq= H: Handlers=sysrq kbd event5 keychord B: PROP=0 B: EV=12001f B: KEY=4837fff 72ff32d bf544446 0 0 1 30f90 8b17c007 ffff7bfa d941dfff febeffdf ffefffff ffffffff fffffffe B: REL=40 B: ABS=1 0 B: MSC=10 B: LED=1f I: Bus=0003 Vendor=093a Product=2510 Version=0111 N: Name="PixArt USB Optical Mouse" P: Phys=usb-usb20_host-1.2.4/input0 S: Sysfs=/devices/platform/usb20_host/usb2/2-1/2-1.2/2-1.2.4/2-1.2.4:1.0/input/input7 U: Uniq= H: Handlers=event6 B: PROP=0 B: EV=17 B: KEY=70000 0 0 0 0 0 0 0 0 B: REL=103 B: MSC=10在上面的H:中可以看到对应的eventxx。
