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Date: Wed, 20 Apr 2022 21:04:55 +0200
From: Greg KH <gregkh@linuxfoundation.org>
To: "Luck, Tony" <tony.luck@intel.com>
Cc: "Williams, Dan J" <dan.j.williams@intel.com>,
	Hans de Goede <hdegoede@redhat.com>,
	"markgross@kernel.org" <markgross@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
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	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
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	"Shankar, Ravi V" <ravi.v.shankar@intel.com>
Subject: Re: [PATCH v3 03/11] platform/x86/intel/ifs: Create device for Intel
 IFS (In Field Scan)
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On Wed, Apr 20, 2022 at 06:08:20PM +0000, Luck, Tony wrote:
> >> Or is it ok for them all to sit at the top level of /sys/devices/virtual?
> >
> > How many do you have?
> >
> > And why is a directory needed for just one tiny driver type?
> 
> One today. Two tomorrow (internally ... next gen CPU).
> 
> Three eventually (That's how many are on the roadmap that I can see).

Then just use a misc device, it's simple and saves you a ton of code.