Re: [PATCH] OMAP4: McBSP: Clear rx_irq at probe time

[Jarkko Nikula <jhnikula@gmail.com>]

On Tue, 14 Jun 2011 14:19:34 +0300
Péter Ujfalusi <peter.ujfalusi@ti.com> wrote:

> We have discussion ongoing about the mcbsp code move, and so far the current 
> understanding/plan is (Jarkko/Liam correct me if I'm wrong):
> - Fix the OMAP4 support
> - move the code under sound/soc/omap/
>  - the reason for this is that McBSP block can be only used for streaming type 
> of modes (from omap2430 onwards McBSP does not have clock stop functionality).
> This makes other type of usage hard to say the least.
> - Clean up the code (remove the SPI mode, remove unused code paths at the same 
> time)
> - Consolidate the interface for audio only use

Yeah, now is perfect time to tell if there is any need for something
else than audio.

OMAP1xxx/59xx and 2420 are already something like more
than 5 years old obsolete components and we haven't seen that any of
them would need SPI/clock stop functionality. Actually we haven't seen
any other use for McBSP than audio.

> - Only OMAP3 has sidetone (on OMAP2 EAC block has the sidetone), might need 
> some change, but I think the current way can be reused.
> 
Yeah, they probably need work on kernel side (hwmod stuff etc) but I
think for keeping userspace intact over the cleanup we might want to
keep these special sysfs nodes for sidetone filter coefficients, dma
operating mode and FIFO threshold as it over the cleanup.

-- 
Jarkko
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