On Wed, 2010-03-17 at 17:42 -0500, Olaya, Margarita wrote: > From: Misael Lopez Cruz <x0052729@xxxxxx> > > Initial version of TWL6040 codec driver. > > The TWL6040 codec uses a proprietary PDM-based digital audio interface. > Audio paths supported are: > > - Input: Main Mic, Sub Mic, Headset Mic, Auxiliary-FM Left/Right > - Output: Headset Left/Right, Handsfree Left/Right > > TWL6040 codec supports power-up/down manual and automatic sequence. > Manual sequence is done through a specific register writes sequence. > Automatic sequence is done when the codec is powered-up through the > external AUDPWRON line. The completion of the sequence is signaled > through the audio interrupt. > > TWL6040 codec sysclk can be provided by: low-power or high > performance PLL: > > - The low-power PLL takes a low-frequency input at 32,768 Hz and > generates an approximate of 17.64 or 19.2 MHz (for 44.1 KHz and 48 KHz > respectively) > > - The high-performance PLL generates an exact 19.2 MHz clock signal > from high-frequency input at 12/19.2/26/38.4 MHz. > > Low-power playback mode is a special scenario where only headset path > (headset DAC and driver) is active. > > For the particular case of headset path, PLL being used defines the > headset power mode: low-power, high-performance. > > Signed-off-by: Misael Lopez Cruz <x0052729@xxxxxx> > Signed-off-by: Jorge Eduardo Candelaria <jorge.candelaria@xxxxxx> > Signed-off-by: Margarita Olaya Cabrera <magi.olaya@xxxxxx> Acked-by: Liam Girdwood <lrg@xxxxxxxxxxxxxxx> -- Freelance Developer, SlimLogic Ltd ASoC and Voltage Regulator Maintainer. http://www.slimlogic.co.uk _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
