[PATCH v2 3/6] Documentation: DT: vdma: update binding doc for AXI DMA

[PATCH v2 3/6] Documentation: DT: vdma: update binding doc for AXI DMA

[Kedareswara rao Appana]

This patch updates the device-tree binding doc for
adding support for AXI DMA.

Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
---
Changes for v2:
---> Modified commit message as suggested by Vinod.
---> Moved the patch to forward in the series as suggested by vinod.

 .../devicetree/bindings/dma/xilinx/xilinx_vdma.txt | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt b/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
index a86737c..5841421 100644
--- a/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
+++ b/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
@@ -3,8 +3,13 @@ It can be configured to have one channel or two channels. If configured
 as two channels, one is to transmit to the video device and another is
 to receive from the video device.
 
+Xilinx AXI DMA engine, it does transfers between memory and AXI4 stream
+target devices. It can be configured to have one channel or two channels.
+If configured as two channels, one is to transmit to the device and another
+is to receive from the device.
+
 Required properties:
-- compatible: Should be "xlnx,axi-vdma-1.00.a"
+- compatible: Should be "xlnx,axi-vdma-1.00.a" or "xlnx,axi-dma-1.00.a"
 - #dma-cells: Should be <1>, see "dmas" property below
 - reg: Should contain VDMA registers location and length.
 - xlnx,num-fstores: Should be the number of framebuffers as configured in h/w.
@@ -59,6 +64,21 @@ axi_vdma_0: axivdma@40030000 {
 	} ;
 } ;
 
+axi_dma_0: axidma@40400000 {
+	compatible = "xlnx,axi-dma-1.00.a";
+	#dma-cells = <1>;
+	reg = < 0x40400000 0x10000 >;
+	dma-channel@40400000 {
+		compatible = "xlnx,axi-dma-mm2s-channel";
+		interrupts = < 0 59 4 >;
+		xlnx,datawidth = <0x40>;
+	} ;
+	dma-channel@40400030 {
+		compatible = "xlnx,axi-dma-s2mm-channel";
+		interrupts = < 0 58 4 >;
+		xlnx,datawidth = <0x40>;
+	} ;
+} ;
 
 * DMA client
 
-- 
2.1.2

[PATCH v2 5/6] Documentation: DT: vdma: update binding doc for AXI CDMA

[Kedareswara rao Appana]

This patch updates the device-tree binding doc for
adding support for AXI CDMA.

Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
---
---> Modified commit message as suggested by Vinod.
---> Moved the patch to forward in the series as suggested by vinod.

 .../devicetree/bindings/dma/xilinx/xilinx_vdma.txt     | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt b/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
index 5841421..2b0c12b 100644
--- a/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
+++ b/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
@@ -8,8 +8,12 @@ target devices. It can be configured to have one channel or two channels.
 If configured as two channels, one is to transmit to the device and another
 is to receive from the device.
 
+Xilinx AXI CDMA engine, it does transfers between memory-mapped source
+address and a memory-mapped destination address.
+
 Required properties:
-- compatible: Should be "xlnx,axi-vdma-1.00.a" or "xlnx,axi-dma-1.00.a"
+- compatible: Should be "xlnx,axi-vdma-1.00.a" or "xlnx,axi-dma-1.00.a" or
+	      "xlnx,axi-cdma-1.00.a""
 - #dma-cells: Should be <1>, see "dmas" property below
 - reg: Should contain VDMA registers location and length.
 - xlnx,num-fstores: Should be the number of framebuffers as configured in h/w.
@@ -80,6 +84,18 @@ axi_dma_0: axidma@40400000 {
 	} ;
 } ;
 
+axi_cdma_0: axicdma@7e200000 {
+       compatible = "xlnx,axi-cdma-1.00.a";
+       #dma-cells = <1>;
+       reg = < 0x7e200000 0x10000 >;
+       xlnx,addrwidth = <0x20>;
+       dma-channel@7e200000 {
+               compatible = "xlnx,axi-dma-mm2s-channel";
+               interrupts = < 0 55 4 >;
+               xlnx,datawidth = <0x40>;
+       } ;
+} ;
+
 * DMA client
 
 Required properties:
-- 
2.1.2

Re: [PATCH v2 5/6] Documentation: DT: vdma: update binding doc for AXI CDMA

[Sören Brinkmann]

On Sun, 2016-03-27 at 23:36:06 +0530, Kedareswara rao Appana wrote:
> This patch updates the device-tree binding doc for
> adding support for AXI CDMA.
> 
> Signed-off-by: Kedareswara rao Appana <appanad-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
> ---
> ---> Modified commit message as suggested by Vinod.
> ---> Moved the patch to forward in the series as suggested by vinod.
> 
>  .../devicetree/bindings/dma/xilinx/xilinx_vdma.txt     | 18 +++++++++++++++++-
>  1 file changed, 17 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt b/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> index 5841421..2b0c12b 100644
> --- a/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> +++ b/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> @@ -8,8 +8,12 @@ target devices. It can be configured to have one channel or two channels.
>  If configured as two channels, one is to transmit to the device and another
>  is to receive from the device.
>  
> +Xilinx AXI CDMA engine, it does transfers between memory-mapped source
> +address and a memory-mapped destination address.
> +
>  Required properties:
> -- compatible: Should be "xlnx,axi-vdma-1.00.a" or "xlnx,axi-dma-1.00.a"
> +- compatible: Should be "xlnx,axi-vdma-1.00.a" or "xlnx,axi-dma-1.00.a" or
> +	      "xlnx,axi-cdma-1.00.a""
>  - #dma-cells: Should be <1>, see "dmas" property below
>  - reg: Should contain VDMA registers location and length.
>  - xlnx,num-fstores: Should be the number of framebuffers as configured in h/w.
> @@ -80,6 +84,18 @@ axi_dma_0: axidma@40400000 {
>  	} ;
>  } ;
>  
> +axi_cdma_0: axicdma@7e200000 {
> +       compatible = "xlnx,axi-cdma-1.00.a";
> +       #dma-cells = <1>;
> +       reg = < 0x7e200000 0x10000 >;
> +       xlnx,addrwidth = <0x20>;
> +       dma-channel@7e200000 {
> +               compatible = "xlnx,axi-dma-mm2s-channel";
> +               interrupts = < 0 55 4 >;
> +               xlnx,datawidth = <0x40>;
> +       } ;
> +} ;

As in the other patch, the node name should be 'dma-controller@...' and
the inconsistend spacing could be fixed.

Also, it seems this adds pretty much identical examples that just differ
in the compat string. Is that really needed?

	Sören

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RE: [PATCH v2 5/6] Documentation: DT: vdma: update binding doc for AXI CDMA

[Appana Durga Kedareswara Rao]

Hi Soren,

> -----Original Message-----
> From: Sören Brinkmann [mailto:soren.brinkmann@xilinx.com]
> Sent: Monday, March 28, 2016 12:58 AM
> To: Appana Durga Kedareswara Rao
> Cc: robh+dt@kernel.org; pawel.moll@arm.com; mark.rutland@arm.com;
> ijc+devicetree@hellion.org.uk; galak@codeaurora.org; Michal Simek;
> vinod.koul@intel.com; dan.j.williams@intel.com; Anurag Kumar Vulisha; Appana
> Durga Kedareswara Rao; moritz.fischer@ettus.com;
> laurent.pinchart@ideasonboard.com; luis@debethencourt.com; Srikanth
> Vemula; Anirudha Sarangi; devicetree@vger.kernel.org; linux-arm-
> kernel@lists.infradead.org; linux-kernel@vger.kernel.org;
> dmaengine@vger.kernel.org
> Subject: Re: [PATCH v2 5/6] Documentation: DT: vdma: update binding doc for
> AXI CDMA
> 
> On Sun, 2016-03-27 at 23:36:06 +0530, Kedareswara rao Appana wrote:
> > This patch updates the device-tree binding doc for adding support for
> > AXI CDMA.
> >
> > Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
> > ---
> > ---> Modified commit message as suggested by Vinod.
> > ---> Moved the patch to forward in the series as suggested by vinod.
> >
> >  .../devicetree/bindings/dma/xilinx/xilinx_vdma.txt     | 18
> +++++++++++++++++-
> >  1 file changed, 17 insertions(+), 1 deletion(-)
> >
> > diff --git
> > a/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> > b/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> > index 5841421..2b0c12b 100644
> > --- a/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> > +++ b/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> > @@ -8,8 +8,12 @@ target devices. It can be configured to have one channel
> or two channels.
> >  If configured as two channels, one is to transmit to the device and
> > another  is to receive from the device.
> >
> > +Xilinx AXI CDMA engine, it does transfers between memory-mapped
> > +source address and a memory-mapped destination address.
> > +
> >  Required properties:
> > -- compatible: Should be "xlnx,axi-vdma-1.00.a" or "xlnx,axi-dma-1.00.a"
> > +- compatible: Should be "xlnx,axi-vdma-1.00.a" or "xlnx,axi-dma-1.00.a" or
> > +	      "xlnx,axi-cdma-1.00.a""
> >  - #dma-cells: Should be <1>, see "dmas" property below
> >  - reg: Should contain VDMA registers location and length.
> >  - xlnx,num-fstores: Should be the number of framebuffers as configured in
> h/w.
> > @@ -80,6 +84,18 @@ axi_dma_0: axidma@40400000 {
> >  	} ;
> >  } ;
> >
> > +axi_cdma_0: axicdma@7e200000 {
> > +       compatible = "xlnx,axi-cdma-1.00.a";
> > +       #dma-cells = <1>;
> > +       reg = < 0x7e200000 0x10000 >;
> > +       xlnx,addrwidth = <0x20>;
> > +       dma-channel@7e200000 {
> > +               compatible = "xlnx,axi-dma-mm2s-channel";
> > +               interrupts = < 0 55 4 >;
> > +               xlnx,datawidth = <0x40>;
> > +       } ;
> > +} ;
> 
> As in the other patch, the node name should be 'dma-controller@...' and the
> inconsistend spacing could be fixed.

Ok will fix...

> 
> Also, it seems this adds pretty much identical examples that just differ in the
> compat string. Is that really needed?

Most of the properties are same across the three DMA's
For AXI VDMA there are few required properties that are not required for AXI DMA/CDMA.
That's why added example for the other IP's as well I mean for AXI DMA and CDMA.

Regards,
Kedar.

> 
> 	Sören

Re: [PATCH v2 5/6] Documentation: DT: vdma: update binding doc for AXI CDMA

[Rob Herring]

On Mon, Mar 28, 2016 at 05:27:01AM +0000, Appana Durga Kedareswara Rao wrote:
> Hi Soren,
> 
> > -----Original Message-----
> > From: Sören Brinkmann [mailto:soren.brinkmann-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org]
> > Sent: Monday, March 28, 2016 12:58 AM
> > To: Appana Durga Kedareswara Rao
> > Cc: robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org; pawel.moll-5wv7dgnIgG8@public.gmane.org; mark.rutland-5wv7dgnIgG8@public.gmane.org;
> > ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org; galak-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org; Michal Simek;
> > vinod.koul-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org; dan.j.williams-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org; Anurag Kumar Vulisha; Appana
> > Durga Kedareswara Rao; moritz.fischer-+aYTwkv1SeIAvxtiuMwx3w@public.gmane.org;
> > laurent.pinchart-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org; luis-HiykPkW1eAzzDCI4PIEvbQC/G2K4zDHf@public.gmane.org; Srikanth
> > Vemula; Anirudha Sarangi; devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org; linux-arm-
> > kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org; linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org;
> > dmaengine-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> > Subject: Re: [PATCH v2 5/6] Documentation: DT: vdma: update binding doc for
> > AXI CDMA
> > 
> > On Sun, 2016-03-27 at 23:36:06 +0530, Kedareswara rao Appana wrote:
> > > This patch updates the device-tree binding doc for adding support for
> > > AXI CDMA.
> > >
> > > Signed-off-by: Kedareswara rao Appana <appanad-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
> > > ---
> > > ---> Modified commit message as suggested by Vinod.
> > > ---> Moved the patch to forward in the series as suggested by vinod.
> > >
> > >  .../devicetree/bindings/dma/xilinx/xilinx_vdma.txt     | 18
> > +++++++++++++++++-
> > >  1 file changed, 17 insertions(+), 1 deletion(-)
> > >
> > > diff --git
> > > a/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> > > b/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> > > index 5841421..2b0c12b 100644
> > > --- a/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> > > +++ b/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> > > @@ -8,8 +8,12 @@ target devices. It can be configured to have one channel
> > or two channels.
> > >  If configured as two channels, one is to transmit to the device and
> > > another  is to receive from the device.
> > >
> > > +Xilinx AXI CDMA engine, it does transfers between memory-mapped
> > > +source address and a memory-mapped destination address.
> > > +
> > >  Required properties:
> > > -- compatible: Should be "xlnx,axi-vdma-1.00.a" or "xlnx,axi-dma-1.00.a"
> > > +- compatible: Should be "xlnx,axi-vdma-1.00.a" or "xlnx,axi-dma-1.00.a" or
> > > +	      "xlnx,axi-cdma-1.00.a""
> > >  - #dma-cells: Should be <1>, see "dmas" property below
> > >  - reg: Should contain VDMA registers location and length.
> > >  - xlnx,num-fstores: Should be the number of framebuffers as configured in
> > h/w.
> > > @@ -80,6 +84,18 @@ axi_dma_0: axidma@40400000 {
> > >  	} ;
> > >  } ;
> > >
> > > +axi_cdma_0: axicdma@7e200000 {
> > > +       compatible = "xlnx,axi-cdma-1.00.a";
> > > +       #dma-cells = <1>;
> > > +       reg = < 0x7e200000 0x10000 >;
> > > +       xlnx,addrwidth = <0x20>;
> > > +       dma-channel@7e200000 {
> > > +               compatible = "xlnx,axi-dma-mm2s-channel";
> > > +               interrupts = < 0 55 4 >;
> > > +               xlnx,datawidth = <0x40>;
> > > +       } ;
> > > +} ;
> > 
> > As in the other patch, the node name should be 'dma-controller@...' and the
> > inconsistend spacing could be fixed.
> 
> Ok will fix...
> 
> > 
> > Also, it seems this adds pretty much identical examples that just differ in the
> > compat string. Is that really needed?
> 
> Most of the properties are same across the three DMA's
> For AXI VDMA there are few required properties that are not required for AXI DMA/CDMA.
> That's why added example for the other IP's as well I mean for AXI DMA and CDMA.

It needs to be clear what properties are required/valid for each 
compatible string rather than relying on examples. I should be able to 
write or validate the examples based on the rest of the text.

Rob
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RE: [PATCH v2 5/6] Documentation: DT: vdma: update binding doc for AXI CDMA

[Appana Durga Kedareswara Rao]

Hi Rob,

> -----Original Message-----
> From: Rob Herring [mailto:robh@kernel.org]
> Sent: Tuesday, March 29, 2016 2:26 AM
> To: Appana Durga Kedareswara Rao
> Cc: Soren Brinkmann; pawel.moll@arm.com; mark.rutland@arm.com;
> ijc+devicetree@hellion.org.uk; galak@codeaurora.org; Michal Simek;
> vinod.koul@intel.com; dan.j.williams@intel.com; Anurag Kumar Vulisha;
> moritz.fischer@ettus.com; laurent.pinchart@ideasonboard.com;
> luis@debethencourt.com; Srikanth Vemula; Anirudha Sarangi;
> devicetree@vger.kernel.org; linux-arm-kernel@lists.infradead.org; linux-
> kernel@vger.kernel.org; dmaengine@vger.kernel.org
> Subject: Re: [PATCH v2 5/6] Documentation: DT: vdma: update binding doc for
> AXI CDMA
> 
> On Mon, Mar 28, 2016 at 05:27:01AM +0000, Appana Durga Kedareswara Rao
> wrote:
> > Hi Soren,
> >
> > > -----Original Message-----
> > > From: Sören Brinkmann [mailto:soren.brinkmann@xilinx.com]
> > > Sent: Monday, March 28, 2016 12:58 AM
> > > To: Appana Durga Kedareswara Rao
> > > Cc: robh+dt@kernel.org; pawel.moll@arm.com; mark.rutland@arm.com;
> > > ijc+devicetree@hellion.org.uk; galak@codeaurora.org; Michal Simek;
> > > vinod.koul@intel.com; dan.j.williams@intel.com; Anurag Kumar
> > > Vulisha; Appana Durga Kedareswara Rao; moritz.fischer@ettus.com;
> > > laurent.pinchart@ideasonboard.com; luis@debethencourt.com; Srikanth
> > > Vemula; Anirudha Sarangi; devicetree@vger.kernel.org; linux-arm-
> > > kernel@lists.infradead.org; linux-kernel@vger.kernel.org;
> > > dmaengine@vger.kernel.org
> > > Subject: Re: [PATCH v2 5/6] Documentation: DT: vdma: update binding
> > > doc for AXI CDMA
> > >
> > > On Sun, 2016-03-27 at 23:36:06 +0530, Kedareswara rao Appana wrote:
> > > > This patch updates the device-tree binding doc for adding support
> > > > for AXI CDMA.
> > > >
> > > > Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
> > > > ---
> > > > ---> Modified commit message as suggested by Vinod.
> > > > ---> Moved the patch to forward in the series as suggested by vinod.
> > > >
> > > >  .../devicetree/bindings/dma/xilinx/xilinx_vdma.txt     | 18
> > > +++++++++++++++++-
> > > >  1 file changed, 17 insertions(+), 1 deletion(-)
> > > >
> > > > diff --git
> > > > a/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> > > > b/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> > > > index 5841421..2b0c12b 100644
> > > > --- a/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> > > > +++ b/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> > > > @@ -8,8 +8,12 @@ target devices. It can be configured to have one
> > > > channel
> > > or two channels.
> > > >  If configured as two channels, one is to transmit to the device
> > > > and another  is to receive from the device.
> > > >
> > > > +Xilinx AXI CDMA engine, it does transfers between memory-mapped
> > > > +source address and a memory-mapped destination address.
> > > > +
> > > >  Required properties:
> > > > -- compatible: Should be "xlnx,axi-vdma-1.00.a" or "xlnx,axi-dma-1.00.a"
> > > > +- compatible: Should be "xlnx,axi-vdma-1.00.a" or "xlnx,axi-dma-1.00.a"
> or
> > > > +	      "xlnx,axi-cdma-1.00.a""
> > > >  - #dma-cells: Should be <1>, see "dmas" property below
> > > >  - reg: Should contain VDMA registers location and length.
> > > >  - xlnx,num-fstores: Should be the number of framebuffers as
> > > > configured in
> > > h/w.
> > > > @@ -80,6 +84,18 @@ axi_dma_0: axidma@40400000 {
> > > >  	} ;
> > > >  } ;
> > > >
> > > > +axi_cdma_0: axicdma@7e200000 {
> > > > +       compatible = "xlnx,axi-cdma-1.00.a";
> > > > +       #dma-cells = <1>;
> > > > +       reg = < 0x7e200000 0x10000 >;
> > > > +       xlnx,addrwidth = <0x20>;
> > > > +       dma-channel@7e200000 {
> > > > +               compatible = "xlnx,axi-dma-mm2s-channel";
> > > > +               interrupts = < 0 55 4 >;
> > > > +               xlnx,datawidth = <0x40>;
> > > > +       } ;
> > > > +} ;
> > >
> > > As in the other patch, the node name should be 'dma-controller@...'
> > > and the inconsistend spacing could be fixed.
> >
> > Ok will fix...
> >
> > >
> > > Also, it seems this adds pretty much identical examples that just
> > > differ in the compat string. Is that really needed?
> >
> > Most of the properties are same across the three DMA's For AXI VDMA
> > there are few required properties that are not required for AXI DMA/CDMA.
> > That's why added example for the other IP's as well I mean for AXI DMA and
> CDMA.
> 
> It needs to be clear what properties are required/valid for each compatible
> string rather than relying on examples. I should be able to write or validate the
> examples based on the rest of the text.

Ok will fix it in the next version of the patch.

Regards,
Kedar.

> 
> Rob

Re: [PATCH v2 3/6] Documentation: DT: vdma: update binding doc for AXI DMA

[Sören Brinkmann]

On Sun, 2016-03-27 at 23:36:05 +0530, Kedareswara rao Appana wrote:
> This patch updates the device-tree binding doc for
> adding support for AXI DMA.
> 
> Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
> ---
> Changes for v2:
> ---> Modified commit message as suggested by Vinod.
> ---> Moved the patch to forward in the series as suggested by vinod.
> 
>  .../devicetree/bindings/dma/xilinx/xilinx_vdma.txt | 22 +++++++++++++++++++++-
>  1 file changed, 21 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt b/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> index a86737c..5841421 100644
> --- a/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> +++ b/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> @@ -3,8 +3,13 @@ It can be configured to have one channel or two channels. If configured
>  as two channels, one is to transmit to the video device and another is
>  to receive from the video device.
>  
> +Xilinx AXI DMA engine, it does transfers between memory and AXI4 stream
> +target devices. It can be configured to have one channel or two channels.
> +If configured as two channels, one is to transmit to the device and another
> +is to receive from the device.
> +
>  Required properties:
> -- compatible: Should be "xlnx,axi-vdma-1.00.a"
> +- compatible: Should be "xlnx,axi-vdma-1.00.a" or "xlnx,axi-dma-1.00.a"
>  - #dma-cells: Should be <1>, see "dmas" property below
>  - reg: Should contain VDMA registers location and length.
>  - xlnx,num-fstores: Should be the number of framebuffers as configured in h/w.
> @@ -59,6 +64,21 @@ axi_vdma_0: axivdma@40030000 {
>  	} ;
>  } ;
>  
> +axi_dma_0: axidma@40400000 {

The node names should follow the generic names, hence
'dma-controller@...'.

> +	compatible = "xlnx,axi-dma-1.00.a";
> +	#dma-cells = <1>;
> +	reg = < 0x40400000 0x10000 >;
> +	dma-channel@40400000 {
> +		compatible = "xlnx,axi-dma-mm2s-channel";
> +		interrupts = < 0 59 4 >;
> +		xlnx,datawidth = <0x40>;
> +	} ;
> +	dma-channel@40400030 {
> +		compatible = "xlnx,axi-dma-s2mm-channel";
> +		interrupts = < 0 58 4 >;
> +		xlnx,datawidth = <0x40>;

Nit: The spacing around the '<' '>' is inconsistent. I'd just remove all
redundant spaces.

	Sören

RE: [PATCH v2 3/6] Documentation: DT: vdma: update binding doc for AXI DMA

[Appana Durga Kedareswara Rao]

Hi Soren,

> -----Original Message-----
> From: Sören Brinkmann [mailto:soren.brinkmann@xilinx.com]
> Sent: Monday, March 28, 2016 12:56 AM
> To: Appana Durga Kedareswara Rao
> Cc: robh+dt@kernel.org; pawel.moll@arm.com; mark.rutland@arm.com;
> ijc+devicetree@hellion.org.uk; galak@codeaurora.org; Michal Simek;
> vinod.koul@intel.com; dan.j.williams@intel.com; Anurag Kumar Vulisha; Appana
> Durga Kedareswara Rao; moritz.fischer@ettus.com;
> laurent.pinchart@ideasonboard.com; luis@debethencourt.com; Srikanth
> Vemula; Anirudha Sarangi; devicetree@vger.kernel.org; linux-arm-
> kernel@lists.infradead.org; linux-kernel@vger.kernel.org;
> dmaengine@vger.kernel.org
> Subject: Re: [PATCH v2 3/6] Documentation: DT: vdma: update binding doc for
> AXI DMA
> 
> On Sun, 2016-03-27 at 23:36:05 +0530, Kedareswara rao Appana wrote:
> > This patch updates the device-tree binding doc for adding support for
> > AXI DMA.
> >
> > Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
> > ---
> > Changes for v2:
> > ---> Modified commit message as suggested by Vinod.
> > ---> Moved the patch to forward in the series as suggested by vinod.
> >
> >  .../devicetree/bindings/dma/xilinx/xilinx_vdma.txt | 22
> > +++++++++++++++++++++-
> >  1 file changed, 21 insertions(+), 1 deletion(-)
> >
> > diff --git
> > a/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> > b/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> > index a86737c..5841421 100644
> > --- a/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> > +++ b/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> > @@ -3,8 +3,13 @@ It can be configured to have one channel or two
> > channels. If configured  as two channels, one is to transmit to the
> > video device and another is  to receive from the video device.
> >
> > +Xilinx AXI DMA engine, it does transfers between memory and AXI4
> > +stream target devices. It can be configured to have one channel or two
> channels.
> > +If configured as two channels, one is to transmit to the device and
> > +another is to receive from the device.
> > +
> >  Required properties:
> > -- compatible: Should be "xlnx,axi-vdma-1.00.a"
> > +- compatible: Should be "xlnx,axi-vdma-1.00.a" or "xlnx,axi-dma-1.00.a"
> >  - #dma-cells: Should be <1>, see "dmas" property below
> >  - reg: Should contain VDMA registers location and length.
> >  - xlnx,num-fstores: Should be the number of framebuffers as configured in
> h/w.
> > @@ -59,6 +64,21 @@ axi_vdma_0: axivdma@40030000 {
> >  	} ;
> >  } ;
> >
> > +axi_dma_0: axidma@40400000 {
> 
> The node names should follow the generic names, hence 'dma-controller@...'.

Ok will fix in next version...

> 
> > +	compatible = "xlnx,axi-dma-1.00.a";
> > +	#dma-cells = <1>;
> > +	reg = < 0x40400000 0x10000 >;
> > +	dma-channel@40400000 {
> > +		compatible = "xlnx,axi-dma-mm2s-channel";
> > +		interrupts = < 0 59 4 >;
> > +		xlnx,datawidth = <0x40>;
> > +	} ;
> > +	dma-channel@40400030 {
> > +		compatible = "xlnx,axi-dma-s2mm-channel";
> > +		interrupts = < 0 58 4 >;
> > +		xlnx,datawidth = <0x40>;
> 
> Nit: The spacing around the '<' '>' is inconsistent. I'd just remove all redundant
> spaces.

Ok will fix in next version...

Regards,
Kedar.

> 
> 	Sören
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Re: [PATCH v2 3/6] Documentation: DT: vdma: update binding doc for AXI DMA

[Rob Herring]

On Sun, Mar 27, 2016 at 11:36:05PM +0530, Kedareswara rao Appana wrote:
> This patch updates the device-tree binding doc for
> adding support for AXI DMA.
> 
> Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
> ---
> Changes for v2:
> ---> Modified commit message as suggested by Vinod.
> ---> Moved the patch to forward in the series as suggested by vinod.
> 
>  .../devicetree/bindings/dma/xilinx/xilinx_vdma.txt | 22 +++++++++++++++++++++-
>  1 file changed, 21 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt b/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> index a86737c..5841421 100644
> --- a/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> +++ b/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> @@ -3,8 +3,13 @@ It can be configured to have one channel or two channels. If configured
>  as two channels, one is to transmit to the video device and another is
>  to receive from the video device.
>  
> +Xilinx AXI DMA engine, it does transfers between memory and AXI4 stream
> +target devices. It can be configured to have one channel or two channels.
> +If configured as two channels, one is to transmit to the device and another
> +is to receive from the device.
> +
>  Required properties:
> -- compatible: Should be "xlnx,axi-vdma-1.00.a"
> +- compatible: Should be "xlnx,axi-vdma-1.00.a" or "xlnx,axi-dma-1.00.a"

Why the new compatible string? This is 2 different IP blocks? If so, is 
there really much shared?

>  - #dma-cells: Should be <1>, see "dmas" property below
>  - reg: Should contain VDMA registers location and length.
>  - xlnx,num-fstores: Should be the number of framebuffers as configured in h/w.
> @@ -59,6 +64,21 @@ axi_vdma_0: axivdma@40030000 {
>  	} ;
>  } ;
>  
> +axi_dma_0: axidma@40400000 {

dma@40400000

> +	compatible = "xlnx,axi-dma-1.00.a";
> +	#dma-cells = <1>;
> +	reg = < 0x40400000 0x10000 >;
> +	dma-channel@40400000 {
> +		compatible = "xlnx,axi-dma-mm2s-channel";
> +		interrupts = < 0 59 4 >;
> +		xlnx,datawidth = <0x40>;
> +	} ;
> +	dma-channel@40400030 {
> +		compatible = "xlnx,axi-dma-s2mm-channel";
> +		interrupts = < 0 58 4 >;
> +		xlnx,datawidth = <0x40>;
> +	} ;
> +} ;
>  
>  * DMA client
>  
> -- 
> 2.1.2
> 
> 
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

RE: [PATCH v2 3/6] Documentation: DT: vdma: update binding doc for AXI DMA

[Appana Durga Kedareswara Rao]

Hi Rob,

> -----Original Message-----
> From: Rob Herring [mailto:robh@kernel.org]
> Sent: Tuesday, March 29, 2016 2:23 AM
> To: Appana Durga Kedareswara Rao
> Cc: pawel.moll@arm.com; mark.rutland@arm.com;
> ijc+devicetree@hellion.org.uk; galak@codeaurora.org; Michal Simek; Soren
> Brinkmann; vinod.koul@intel.com; dan.j.williams@intel.com; Anurag Kumar
> Vulisha; Appana Durga Kedareswara Rao; moritz.fischer@ettus.com;
> laurent.pinchart@ideasonboard.com; luis@debethencourt.com; Srikanth
> Vemula; Anirudha Sarangi; dmaengine@vger.kernel.org;
> devicetree@vger.kernel.org; linux-kernel@vger.kernel.org; linux-arm-
> kernel@lists.infradead.org
> Subject: Re: [PATCH v2 3/6] Documentation: DT: vdma: update binding doc for
> AXI DMA
> 
> On Sun, Mar 27, 2016 at 11:36:05PM +0530, Kedareswara rao Appana wrote:
> > This patch updates the device-tree binding doc for adding support for
> > AXI DMA.
> >
> > Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
> > ---
> > Changes for v2:
> > ---> Modified commit message as suggested by Vinod.
> > ---> Moved the patch to forward in the series as suggested by vinod.
> >
> >  .../devicetree/bindings/dma/xilinx/xilinx_vdma.txt | 22
> > +++++++++++++++++++++-
> >  1 file changed, 21 insertions(+), 1 deletion(-)
> >
> > diff --git
> > a/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> > b/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> > index a86737c..5841421 100644
> > --- a/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> > +++ b/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> > @@ -3,8 +3,13 @@ It can be configured to have one channel or two
> > channels. If configured  as two channels, one is to transmit to the
> > video device and another is  to receive from the video device.
> >
> > +Xilinx AXI DMA engine, it does transfers between memory and AXI4
> > +stream target devices. It can be configured to have one channel or two
> channels.
> > +If configured as two channels, one is to transmit to the device and
> > +another is to receive from the device.
> > +
> >  Required properties:
> > -- compatible: Should be "xlnx,axi-vdma-1.00.a"
> > +- compatible: Should be "xlnx,axi-vdma-1.00.a" or "xlnx,axi-dma-1.00.a"
> 
> Why the new compatible string? This is 2 different IP blocks? If so, is there really
> much shared?

The support for the AXI DMA IP also added to the existing VDMA Linux driver
In this series of patches.

> 
> >  - #dma-cells: Should be <1>, see "dmas" property below
> >  - reg: Should contain VDMA registers location and length.
> >  - xlnx,num-fstores: Should be the number of framebuffers as configured in
> h/w.
> > @@ -59,6 +64,21 @@ axi_vdma_0: axivdma@40030000 {
> >  	} ;
> >  } ;
> >
> > +axi_dma_0: axidma@40400000 {
> 
> dma@40400000

Ok will fix in the next version 

Thanks,
Kedar.

> 
> > +	compatible = "xlnx,axi-dma-1.00.a";
> > +	#dma-cells = <1>;
> > +	reg = < 0x40400000 0x10000 >;
> > +	dma-channel@40400000 {
> > +		compatible = "xlnx,axi-dma-mm2s-channel";
> > +		interrupts = < 0 59 4 >;
> > +		xlnx,datawidth = <0x40>;
> > +	} ;
> > +	dma-channel@40400030 {
> > +		compatible = "xlnx,axi-dma-s2mm-channel";
> > +		interrupts = < 0 58 4 >;
> > +		xlnx,datawidth = <0x40>;
> > +	} ;
> > +} ;
> >
> >  * DMA client
> >
> > --
> > 2.1.2
> >
> >
> > _______________________________________________
> > linux-arm-kernel mailing list
> > linux-arm-kernel@lists.infradead.org
> > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel