GTM601 UMTS modem audio interface CODEC This device has no configuration interface. The sample rate and channels are based on the compatible string "option,gtm601" = 8kHz mono "broadmobi,bm818" = 48KHz stereo Required properties: - compatible : one of "option,gtm601" "broadmobi,bm818" Example: codec: gtm601_codec { compatible = "option,gtm601"; };