usb的device模式hid配置错误点

将usb做从机，hid通信操作（模拟串口，模拟u盘，hid通信...）

内核设定

1-模拟u盘

2.模拟串口
 

3.hid通信 

1.报错：

# insmod libcomposite.ko
[   88.529791] libcomposite: Unknown symbol usb_udc_attach_driver (err 0)
[   88.536358] libcomposite: Unknown symbol usb_gadget_probe_driver (err 0)
[   88.545108] libcomposite: Unknown symbol usb_gadget_ep_match_desc (err 0)
[   88.552383] libcomposite: Unknown symbol usb_gadget_set_state (err 0)
[   88.560708] libcomposite: Unknown symbol usb_gadget_unregister_driver (err 0)
insmod: can't insert 'libcomposite.ko': unknown symbol in module, or unknown parameter
#
#
#
# insmod configfs.ko
[   96.653566] configfs: exports duplicate symbol config_group_find_item (owned by kernel)
insmod: can't insert 'configfs.ko': invalid module format
#
# insmod libcomposite.ko
[  101.661141] libcomposite: Unknown symbol usb_udc_attach_driver (err 0)
[  101.667983] libcomposite: Unknown symbol usb_gadget_probe_driver (err 0)
[  101.674674] libcomposite: Unknown symbol usb_gadget_ep_match_desc (err 0)
[  101.684324] libcomposite: Unknown symbol usb_gadget_set_state (err 0)
[  101.691233] libcomposite: Unknown symbol usb_gadget_unregister_driver (err 0)
insmod: can't insert 'libcomposite.ko': unknown symbol in module, or unknown parameter

根源：配置出错

2.报错：can't insert 'g_hid.ko': No such device

 # insmod g_hid.ko
insmod: can't insert 'g_hid.ko': No such device
根源：缺少补丁
见分析：http://blog.chinaunix.net/uid-26418332-id-5107484.html

3.单独配置和编译Linux的驱动driver下某个模块，或者更新某个模块的ko文件：

先cd到具体的目录下，然后输入指令；
make -C /home/user/NUC970_Buildroot-master/output/build/linux-master M=`pwd` modules