[alsa-devel] how to check the CODEC registers vaule

Zhang wei zhangwei at vimicro.com
Thu Dec 20 03:31:00 CET 2012

Hello everyone,I am confused again : (

I read the wm8985.pdf and found the description:


If the address is not recognised or the R/W bit is '1' when operating in
write only mode,the WM8985 returns to the idle conditon and waits for a
new start condition and valid address.


Does it mean the wm8985 registers write only, can not be read?

I found other kinds of codec datasheet same as it. Is it necessary to
read back the value from the register ?


Thanks a lot.

Best Regards



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