Messages in this thread | | | Date | Mon, 7 Mar 2016 20:24:29 +0530 | From | Vinod Koul <> | Subject | Re: [PATCH] dma: sun4i: expose block size and wait cycle configuration to DMA users |
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On Mon, Mar 07, 2016 at 10:59:31AM +0100, Boris Brezillon wrote: > +/* Dedicated DMA parameter register layout */ > +#define SUN4I_DDMA_PARA_DST_DATA_BLK_SIZE(n) (((n) - 1) << 24) > +#define SUN4I_DDMA_PARA_DST_WAIT_CYCLES(n) (((n) - 1) << 16) > +#define SUN4I_DDMA_PARA_SRC_DATA_BLK_SIZE(n) (((n) - 1) << 8) > +#define SUN4I_DDMA_PARA_SRC_WAIT_CYCLES(n) (((n) - 1) << 0) > + > +/** > + * struct sun4i_dma_chan_config - DMA channel config > + * > + * @para: contains information about block size and time before checking > + * DRQ line. This is device specific and only applicable to dedicated > + * DMA channels
What information, can you elobrate.. And why can't you use existing dma_slave_config for this?
> + */ > +struct sun4i_dma_chan_config { > + u32 para; > +}; > + > +int sun4i_dma_set_chan_config(struct dma_chan *dchan, > + const struct sun4i_dma_chan_config *cfg); > + > +#endif /* _SUN4I_DMA_H */
-- ~Vinod
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