Re: [PATCH v2] DMA: add help function to check whether dma controller registered

2013-08-23 Thread Stephen Warren
On 08/22/2013 07:17 PM, Richard Zhao wrote: > On Fri, Aug 23, 2013 at 04:36:53AM +0800, Stephen Warren wrote: >> On 08/22/2013 12:43 AM, Richard Zhao wrote: >>> DMA client device driver usually needs to know at probe time whether >>> dma controller has been registered to deffer probe. So add a help

Re: [PATCH v2] DMA: add help function to check whether dma controller registered

2013-08-22 Thread Richard Zhao
On Fri, Aug 23, 2013 at 04:36:53AM +0800, Stephen Warren wrote: > On 08/22/2013 12:43 AM, Richard Zhao wrote: > > DMA client device driver usually needs to know at probe time whether > > dma controller has been registered to deffer probe. So add a help > > function of_dma_check_controller. > > > >

Re: [PATCH v2] DMA: add help function to check whether dma controller registered

2013-08-22 Thread Stephen Warren
On 08/22/2013 12:43 AM, Richard Zhao wrote: > DMA client device driver usually needs to know at probe time whether > dma controller has been registered to deffer probe. So add a help > function of_dma_check_controller. > > DMA request channel functions can also used to check it, but they > are usu

[PATCH v2] DMA: add help function to check whether dma controller registered

2013-08-21 Thread Richard Zhao
DMA client device driver usually needs to know at probe time whether dma controller has been registered to deffer probe. So add a help function of_dma_check_controller. DMA request channel functions can also used to check it, but they are usually called at open() time. Signed-off-by: Richard Zhao