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

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On 04/06/2016 06:25 PM, Appana Durga Kedareswara Rao wrote:
> Hi Soren,
> 
> 
>> -----Original Message-----
>> From: Sören Brinkmann [mailto:soren.brinkmann@xxxxxxxxxx]
>> Sent: Wednesday, April 06, 2016 9:50 PM
>> To: Appana Durga Kedareswara Rao <appanad@xxxxxxxxxx>
>> Cc: robh+dt@xxxxxxxxxx; pawel.moll@xxxxxxx; mark.rutland@xxxxxxx;
>> ijc+devicetree@xxxxxxxxxxxxxx; galak@xxxxxxxxxxxxxx; Michal Simek
>> <michals@xxxxxxxxxx>; vinod.koul@xxxxxxxxx; dan.j.williams@xxxxxxxxx;
>> Appana Durga Kedareswara Rao <appanad@xxxxxxxxxx>;
>> moritz.fischer@xxxxxxxxx; laurent.pinchart@xxxxxxxxxxxxxxxx;
>> luis@xxxxxxxxxxxxxxxxx; Srikanth Vemula <svemula@xxxxxxxxxx>; Anirudha
>> Sarangi <anirudh@xxxxxxxxxx>; devicetree@xxxxxxxxxxxxxxx; linux-arm-
>> kernel@xxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx;
>> dmaengine@xxxxxxxxxxxxxxx
>> Subject: Re: [PATCH v3 1/5] Documentation: DT: vdma: Rename vdma-chan
>> prefix to dma-chan
>>
>> On Wed, 2016-04-06 at 21:45:31 +0530, Kedareswara rao Appana wrote:
>>> This patch renames the vdma-mm2s-channel/vdma-s2mm-channel
>>> property with dma-mm2s-channel/dma-s2mm-channel to sync with the
>>> driver.
>>>
>>> Signed-off-by: Kedareswara rao Appana <appanad@xxxxxxxxxx>
>>> ---
>>> Changes for v3:
>>> ---> New patch.
>>>
>>>  Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt | 8
>>> ++++----
>>>  1 file changed, 4 insertions(+), 4 deletions(-)
>>>
>>> diff --git
>>> a/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
>>> b/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
>>> index a86737c..762938f 100644
>>> --- 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.
> The patch (dmaengine: vdma: Rename xilinx_vdma_ prefix to xilinx_dma) already got applied in the dma-next tree.
> That's why sent this patch to sync with the current driver I mean latest driver.

The correct solution for this is to revert that part of the change ASAP,
since, as Soeren pointed out, it breaks all existing users.

Thanks,
- Lars

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