[adding devicetree]
On Mon, Oct 07, 2013 at 03:10:34PM +0100, Jonas Jensen wrote:
> The MOXA ART SoC has a DMA controller capable of offloading expensive
> memory operations, such as large copies. This patch adds support for
> the controller including four channels. Two of these are used to
> handle MMC copy on the UC-7112-LX hardware. The remaining two can be
> used in a future audio driver or client application.
>
> Signed-off-by: Jonas Jensen <jonas.jensen@xxxxxxxxx>
> ---
>
> Notes:
> Changes since v9:
>
> 1. reorder probe path, also move dma_async_device_register() to happen after devm_request_irq()
>
> Applies to next-20130927
>
> .../devicetree/bindings/dma/moxa,moxart-dma.txt | 19 +
> drivers/dma/Kconfig | 7 +
> drivers/dma/Makefile | 1 +
> drivers/dma/moxart-dma.c | 651 +++++++++++++++++++++
> 4 files changed, 678 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/dma/moxa,moxart-dma.txt
> create mode 100644 drivers/dma/moxart-dma.c
>
> diff --git a/Documentation/devicetree/bindings/dma/moxa,moxart-dma.txt b/Documentation/devicetree/bindings/dma/moxa,moxart-dma.txt
> new file mode 100644
> index 0000000..79facce
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/dma/moxa,moxart-dma.txt
> @@ -0,0 +1,19 @@
> +MOXA ART DMA Controller
> +
> +See dma.txt first
> +
> +Required properties:
> +
> +- compatible : Must be "moxa,moxart-dma"
Sorry I didn't notice this previously, but "moxa" isn't in
Documentation/devicetree/bindings/vendor-prefixes.txt (despite several
bindings using it). Could you cook up a separate patch to add an entry
for Moxa, please?
Also, given the SoC is called "ART" it's a shame that we're calling this
"moxa,moxart-dma" rather than "moxa,art-dma". We already have precedent
for "moxart" in bindings though, so changing that's likely to lead to
more problems.
> +- reg : Should contain registers location and length
> +- interrupts : Should contain the interrupt number
Sorry for yet more pendantry, but could we instead have:
- interrupts: Should contain an interrupt-specifier for the sole
interrupt generated by the device.
> +- #dma-cells : Should be 1, a single cell holding a line request number
> +
> +Example:
> +
> + dma: dma@90500000 {
> + compatible = "moxa,moxart-dma";
> + reg = <0x90500080 0x40>;
> + interrupts = <24 0>;
> + #dma-cells = <1>;
> + };
Otherwise I think the binding looks OK.
Thanks,
Mark
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
