[V2] dmaengine: fsl-qdma: add NXP Layerscape qDMA engine driver support

[Vinod Koul <vinod.koul@intel.com>]

On Thu, Jan 04, 2018 at 07:36:09AM +0000, Wen He wrote:
> Hi Vinod,

Hi,

Please wrap you replies to 80 chars, I have reflow below..
> 
> I don't know what's them compile? Does means 'the driver has public
> driver, so any arch will compile it'?

Today it does compile on all archs

> 
> If so, the compile qdma module need enable config options
> 'CONFIG_FSl_QDMA' and other architecture should be hide the options.  The
> driver supported arm or arm64 arch, If I change Kconfig to solve compile
> issues, Can I do that?

yes but as a last resort, it would still help if driver has no dependency on
arch and is able to compile on others..

> 
> config FSL_QDMA
>        tristate "NXP Layerscape qDMA engine support"
> +	   depends on ARM || ARM64
>        select DMA_ENGINE
>        select DMA_VIRTUAL_CHANNELS
>        select DMA_ENGINE_RAID
>        select ASYNC_TX_ENABLE_CHANNEL_SWITCH
>        help
>          Support the NXP Layerscape qDMA engine with command queue and legacy mode.
>          Channel virtualization is supported through enqueuing of DMA jobs to,
>          or dequeuing DMA jobs from, different work queues.
>          This module can be found on NXP Layerscape SoCs.
> 
> Best Regards
> Wen He