Re: [PATCH v2 0/7] dmaengine: cppi41: Make CPPI 4.1 driver more generic

* Sergei Shtylyov [off-list ref] [170117 08:06]:

On 01/17/2017 06:55 PM, Tony Lindgren wrote:

quoted

quoted

Most of the patch of this series were part of
"[PATCH 00/11] dmaengine: cppi41: Add dma support to da8xx"

This series intend to make the CPPI 4.1 more generic in order to
add a new platform (the DA8xx).
To achieve that, all the IRQ code present in CPPI 4.1 driver has been moved
to MUSB DSPS driver.
Other changes mainly update the glue layer and platform code to make the
whole driver more generic.

So does da8xx use CPPI 4.1 DMA for other devices also in addition to
musb?

   No. DA8xx CPPI 4.1 is implemented as a part of the MUSB peripheral.
But there were a SoC (support for which never got merged upstream) where
CPPI 4.1 DMA is not limited to USB.

OK thanks for confirming it may pop up in some other devices too.

Anyways that means we can make the cppi41.c runtime PM support simpler
as it's always guaranteed to be enabled when in use with musb.

Regards,

Tony

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