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Date:   Wed, 18 Jan 2023 16:20:39 +0100
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Subject: Re: [RESEND PATCH V11 XDMA 1/2] dmaengine: xilinx: xdma: Add xilinx
 xdma driver
To:     Vinod Koul <vkoul@kernel.org>, Lizhi Hou <lizhi.hou@amd.com>
Cc:     dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org,
        max.zhen@amd.com, sonal.santan@amd.com, larry.liu@amd.com,
        brian.xu@amd.com
References: <1673988842-43631-1-git-send-email-lizhi.hou@amd.com>
 <1673988842-43631-2-git-send-email-lizhi.hou@amd.com>
 <Y8eRhO0j+zozVL8N@matsya>
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From:   =?UTF-8?Q?Martin_T=c5=afma?= <tumic@gpxsee.org>
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>> +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.