Linux如何查看与/dev/input目录下的event对应的设备

1. /dev/input目录

/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：

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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。

2. 与event对应的设备信息

与event对应的相关设备信息位于/proc/bus/input/devices，例子如下：

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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。