Re: [PATCH 4/6] dmaengine: rcar-dmac: Add device tree bindings documentation

[Geert Uytterhoeven <geert@linux-m68k.org>]

On Thu, Jul 31, 2014 at 2:34 AM, Simon Horman
<horms+renesas@verge.net.au> wrote:
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/dma/renesas,rcar-dmac.txt
> @@ -0,0 +1,98 @@
> +* Renesas R-Car DMA Controller Device Tree bindings
> +
> +Renesas R-Car Generation 2 SoCs have have multiple multi-channel DMA
> +controller instances named DMAC capable of serving multiple clients. Channels
> +can be dedicated to specific clients or shared between a large number of
> +clients.
> +
> +DMA clients are connected to the DMAC ports referenced by an 8-bit identifier
> +called MID/RID.

I think the above sentence can be removed, as it's superseded by the first
sentence of the successive paragraph:

> +
> +Each DMA client is connected to one dedicated port of the DMAC, identified by
> +an 8-bit port number called the MID/RID. A DMA controller can thus serve up to
> +256 clients in total. When the number of hardware channels is lower than the
> +number of clients to be served, channels must be shared between multiple DMA
> +clients. The association of DMA clients to DMAC channels is fully dynamic and
> +not described in these device tree bindings.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds