linux-kernel - Re: [PATCH v4 1/2] Documentation: dt: Add Xilinx zynqmp dma device tree binding documentation

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Date:	Mon, 24 Aug 2015 15:47:09 +0200
From:	Lars-Peter Clausen <lars@...afoo.de>
To:	Punnaiah Choudary Kalluri <punnaiah.choudary.kalluri@...inx.com>,
	robh+dt@...nel.org, pawel.moll@....com, mark.rutland@....com,
	ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
	michal.simek@...inx.com, vinod.koul@...el.com,
	dan.j.williams@...el.com
CC:	dmaengine@...r.kernel.org, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	kalluripunnaiahchoudary@...il.com, kpc528@...il.com,
	Punnaiah Choudary Kalluri <punnaia@...inx.com>
Subject: Re: [PATCH v4 1/2] Documentation: dt: Add Xilinx zynqmp dma device
 tree binding documentation

On 08/06/2015 05:19 AM, Punnaiah Choudary Kalluri wrote:
[...]
> +Optional properties:
> +- xlnx,include-sg: Indicates the controller to operate in simple or scatter
> +		   gather dma mode
> +- xlnx,ratectrl: Scheduling interval in terms of clock cycles for
> +		 source AXI transaction
> +- xlnx,overfetch: Tells whether the channel is allowed to over fetch the data
> +- xlnx,src-issue: Number of AXI outstanding transactions on source side
> +- xlnx,desc-axi-cohrnt: Tells whether the AXI transactions generated for the
> +			descriptor read are marked Non-coherent
> +- xlnx,src-axi-cohrnt: Tells whether the AXI transactions generated for the
> +			source descriptor payload are marked Non-coherent
> +- xlnx,dst-axi-cohrnt: Tells whether the AXI transactions generated for the
> +			dst descriptor payload are marked Non-coherent
> +- xlnx,desc-axi-qos: AXI QOS bits to be used for descriptor fetch
> +- xlnx,src-axi-qos: AXI QOS bits to be used for data read
> +- xlnx,dst-axi-qos: AXI QOS bits to be used for data write
> +- xlnx,desc-axi-cache: AXI cache bits to be used for descriptor fetch.
> +- xlnx,desc-axi-cache: AXI cache bits to be used for data read
> +- xlnx,desc-axi-cache: AXI cache bits to be used for data write
> +- xlnx,src-burst-len: AXI length for data read. Support only power of 2 values
> +		      i.e 1,2,4,8 and 16
> +- xlnx,dst-burst-len: AXI length for data write. Support only power of 2 values
> +		      i.e 1,2,4,8 and 16

None of these really belong into the devicetree. This is all runtime
configuration data.

- Lars
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