buildroot 无法识别usb 声卡的问题。

shushukui

插入usb 麦克风，输入dmesg -c
usb 2-1.1: new full-speed USB device number 5 using ehci-platform

arecord -l 无法列出对应的设备

/ # arecord -l
**** List of CAPTURE Hardware Devices ****
card 0: rockchiprk3308b [rockchip,rk3308b-acodec], device 0: dailink-multicodecs multicodec-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 7: Loopback [Loopback], device 0: Loopback PCM [Loopback PCM]
  Subdevices: 8/8
  Subdevice #0: subdevice #0
  Subdevice #1: subdevice #1
  Subdevice #2: subdevice #2
  Subdevice #3: subdevice #3
  Subdevice #4: subdevice #4
  Subdevice #5: subdevice #5
  Subdevice #6: subdevice #6
  Subdevice #7: subdevice #7
card 7: Loopback [Loopback], device 1: Loopback PCM [Loopback PCM]
  Subdevices: 7/8
  Subdevice #0: subdevice #0
  Subdevice #1: subdevice #1
  Subdevice #2: subdevice #2
  Subdevice #3: subdevice #3
  Subdevice #4: subdevice #4
  Subdevice #5: subdevice #5
  Subdevice #6: subdevice #6
  Subdevice #7: subdevice #7

请问如何支持这种设备。

firefly_zhongw

1. 内核配置有没有使能CONFIG_SND_USB_AUDIO
2. 用的USB 声卡设备是MOD-MIC-4XAnalog板子？