linux-kernel - Re: [PATCH v9 5/9] dmaengine: edma: Add TI EDMA device tree binding

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Message-ID: <20130306203152.GO6209@beef>
Date:	Wed, 6 Mar 2013 15:31:52 -0500
From:	Matt Porter <mporter@...com>
To:	Peter Korsgaard <jacmet@...site.dk>
Cc:	Tony Lindgren <tony@...mide.com>, "Nori, Sekhar" <nsekhar@...com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	Vinod Koul <vinod.koul@...el.com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	"Cousson, Benoit" <b-cousson@...com>,
	Russell King <linux@....linux.org.uk>,
	Rob Landley <rob@...dley.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux DaVinci Kernel List 
	<davinci-linux-open-source@...ux.davincidsp.com>,
	Arnd Bergmann <arnd@...db.de>,
	Linux Documentation List <linux-doc@...r.kernel.org>,
	Devicetree Discuss <devicetree-discuss@...ts.ozlabs.org>,
	Linux MMC List <linux-mmc@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux SPI Devel List 
	<spi-devel-general@...ts.sourceforge.net>,
	Linux OMAP List <linux-omap@...r.kernel.org>,
	Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v9 5/9] dmaengine: edma: Add TI EDMA device tree binding

On Wed, Mar 06, 2013 at 08:24:06PM +0000, Peter Korsgaard wrote:
> >>>>> "Matt" == Matt Porter <mporter@...com> writes:
> 
>  Matt> The binding definition is based on the generic DMA controller
>  Matt> binding.
> 
>  Matt> Signed-off-by: Matt Porter <mporter@...com>
>  Matt> ---
>  Matt>  Documentation/devicetree/bindings/dma/ti-edma.txt |   49 +++++++++++++++++++++
>  Matt>  1 file changed, 49 insertions(+)
>  Matt>  create mode 100644 Documentation/devicetree/bindings/dma/ti-edma.txt
> 
>  Matt> diff --git a/Documentation/devicetree/bindings/dma/ti-edma.txt b/Documentation/devicetree/bindings/dma/ti-edma.txt
>  Matt> new file mode 100644
>  Matt> index 0000000..075a60e3
>  Matt> --- /dev/null
>  Matt> +++ b/Documentation/devicetree/bindings/dma/ti-edma.txt
>  Matt> @@ -0,0 +1,49 @@
>  Matt> +TI EDMA
>  Matt> +
>  Matt> +Required properties:
>  Matt> +- compatible : "ti,edma3"
>  Matt> +- ti,hwmods: Name of the hwmods associated to the EDMA
>  Matt> +- ti,edma-regions: Number of regions
>  Matt> +- ti,edma-slots: Number of slots
>  Matt> +- ti,edma-queue-tc-map: List of transfer control to queue mappings
>  Matt> +- ti,edma-queue-priority-map: List of queue priority mappings
>  Matt> +- ti,edma-default-queue: Default queue value
>  Matt> +
>  Matt> +Optional properties:
>  Matt> +- ti,edma-reserved-channels: List of reserved channel regions
>  Matt> +- ti,edma-reserved-slots: List of reserved slot regions
>  Matt> +- ti,edma-xbar-event-map: Crossbar event to channel map
>  Matt> +
>  Matt> +Example:
>  Matt> +
>  Matt> +edma: edma@...00000 {
>  Matt> +	reg = <0x49000000 0x10000>;
>  Matt> +	interrupt-parent = <&intc>;
>  Matt> +	interrupts = <12 13 14>;
> 
> Probably interrupt-parent should be removed from the example as well to
> match am33xx.dtsi

I'm not sure what the DT maintainers want here. Full context within the
example or the actual real usage where it's typically inherited.

Grant or Rob, any thoughts?

-Matt
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