linux-kernel - Re: [RESEND PATCH V11 XDMA 1/2] dmaengine: xilinx: xdma: Add xilinx xdma driver

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Message-ID: <e2cc9724-1ac3-53c4-e33a-197262b989a2@gpxsee.org>
Date:   Wed, 18 Jan 2023 16:20:39 +0100
From:   Martin Tůma <tumic@...see.org>
To:     Vinod Koul <vkoul@...nel.org>, Lizhi Hou <lizhi.hou@....com>
Cc:     dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org,
        max.zhen@....com, sonal.santan@....com, larry.liu@....com,
        brian.xu@....com
Subject: Re: [RESEND PATCH V11 XDMA 1/2] dmaengine: xilinx: xdma: Add xilinx
 xdma driver

>> +static struct platform_driver xdma_driver = {
>> +	.driver		= {
>> +		.name = "xdma",
>> +	},
>> +	.id_table	= xdma_id_table,
>> +	.probe		= xdma_probe,
>> +	.remove		= xdma_remove,
>> +};
>> +
>> +module_platform_driver(xdma_driver);
> 
> who creates this platform device? Any reason why this is not a _real_
> device?
>

The platform device is created by the PCIe card device/driver that uses 
XDMA. See for example our mgb4 v4l2 driver:
https://patchwork.kernel.org/project/linux-media/patch/20230113172636.2590-2-tumic@gpxsee.org/

M.