linux-kernel - Re: [PATCH v3 1/5] Documentation: DT: vdma: Rename vdma-chan prefix to dma-chan

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Message-ID: <20160406230014.GC16193@xsjsorenbubuntu>
Date:	Wed, 6 Apr 2016 16:00:14 -0700
From:	Sören Brinkmann <soren.brinkmann@...inx.com>
To:	"Koul, Vinod" <vinod.koul@...el.com>
CC:	"lars@...afoo.de" <lars@...afoo.de>,
	"appana.durga.rao@...inx.com" <appana.durga.rao@...inx.com>,
	"sorenb@...inx.com" <sorenb@...inx.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"robh+dt@...nel.org" <robh+dt@...nel.org>,
	"pawel.moll@....com" <pawel.moll@....com>,
	"anirudh@...inx.com" <anirudh@...inx.com>,
	"luis@...ethencourt.com" <luis@...ethencourt.com>,
	"moritz.fischer@...us.com" <moritz.fischer@...us.com>,
	"michals@...inx.com" <michals@...inx.com>,
	"svemula@...inx.com" <svemula@...inx.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"Williams, Dan J" <dan.j.williams@...el.com>,
	"mark.rutland@....com" <mark.rutland@....com>,
	"galak@...eaurora.org" <galak@...eaurora.org>,
	"ijc+devicetree@...lion.org.uk" <ijc+devicetree@...lion.org.uk>,
	"dmaengine@...r.kernel.org" <dmaengine@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"laurent.pinchart@...asonboard.com" 
	<laurent.pinchart@...asonboard.com>
Subject: Re: [PATCH v3 1/5] Documentation: DT: vdma: Rename vdma-chan prefix
 to dma-chan

On Wed, 2016-04-06 at 22:13:59 +0000, Koul, Vinod wrote:
> On Wed, 2016-04-06 at 23:16 +0200, Lars-Peter Clausen wrote:
> > On 04/06/2016 06:25 PM, Appana Durga Kedareswara Rao wrote:
> > > a/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> > > > > +++
> > > > > b/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> > > > > @@ -24,8 +24,8 @@ Optional properties:
> > > > >  	{3}, flush s2mm channel
> > > > > 
> > > > >  Required child node properties:
> > > > > -- compatible: It should be either "xlnx,axi-vdma-mm2s-channel"
> > > > > or
> > > > > -	"xlnx,axi-vdma-s2mm-channel".
> > > > > +- compatible: It should be either "xlnx,axi-dma-mm2s-channel"
> > > > > or
> > > > > +	"xlnx,axi-dma-s2mm-channel".
> > > > 
> > > > This change is not backwards compatible and breaks every user of
> > > > the current
> > > > binding.
> > > 
> > > This commit http://git.kernel.org/cgit/linux/kernel/git/vkoul/slave-
> > > dma.git/commit/?h=next&id=8e66e7d682b04f7141f8ae666908c8dcd7fc0bfa 
> > > Renames xilinx_vdma_ prefix to xilinx_dma which includes renaming of
> > > the above properties.
> 
> That patch changes driver from vdma to dma. It does not change property
> name!

It does. Unfortunately there are no line numbers on that website, hence here an excerpt
from the commit you mention:
@@ -1220,26 +1220,26 @@ static int xilinx_vdma_chan_probe(struct xilinx_vdma_device *xdev,
 	if (!has_dre)
 		xdev->common.copy_align = fls(width - 1);
 
-	if (of_device_is_compatible(node, "xlnx,axi-vdma-mm2s-channel")) {
+	if (of_device_is_compatible(node, "xlnx,axi-dma-mm2s-channel")) {
 		chan->direction = DMA_MEM_TO_DEV;
 		chan->id = 0;

	Sören