[LAU] audio with WM8993

Hello there, I am freshman w.r.t Audio driver on Linux. I will start with explaining my HW and then my problem. My HW: I am working with OMAP3530 based custom board (not any standard EVM or Beagle). The closest thing I have the EVM kernel, So, I started off with the EVM kernel and started tweaking around. I have Wolfson Microelectronics WM8993 Audio Codec (SOC) for sound. Now, the WM8993 is also connected to the OMAP I2C-3 for the purpose of volume control / mute etc. the WM8993 data RX is connected to GPIO119 of OMAP. Problem: 1. When I tried to bring up the driver for this SOC, I successfully registered this device with I2C bus. But, I am not able to register this with ALSA. 2. Is it mandatory to register this device with ALSA to receive the Audio? or is there any alternative method to receive the audio? Any pointers will be helpful Murali