Re: [PATCH] ARM: OMAP3: Enable writing to XCCR and RCCR McBSP registers for OMAP 2430/34xx

[Tony Lindgren <tony@atomide.com>]

* Lopez Cruz, Misael <x0052729@ti.com> [090108 19:43]:
> > * Lopez Cruz, Misael <x0052729@ti.com> [081219 04:53]:
> > > This patch enables writing to McBSP Transmit Configuration Control 
> > > Register (XCCR) and Receive Configuration Control Register 
> > (RCCR) for 
> > > 2430/34xx platforms. It also adds XCCR, RCCR entries in 
> > McBSP register 
> > > configuration structure and bit definitions for both registers.
> >
> > Pushing to l-o. Can you briefly describe what happens with 
> > ASoC if these registers are not used? We may be able to send 
> > this as a fix to mainline during the -rc cycle.
> 
> If we enable the writing to those registers for 2430/34xx and don't set the default values (setting 0 as a consequence) in ASoC driver, the Transmit/Receive DMA mode gets disabled and the the transmission/reception doesn't happen, ending with a "write error: Input/Output error" when playing with 'aplay'.

Thanks, I'll add that to the commit in the omap-fixes queue.

Tony