linux-kernel - Re: [PATCH 1/2] misc: add nirtfeatures driver

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Date:	Mon, 14 Mar 2016 17:36:23 -0500
From:	Kyle Roeschley <kyle.roeschley@...com>
To:	Josh Cartwright <joshc@...com>
CC:	Greg KH <gregkh@...uxfoundation.org>, <arnd@...db.de>,
	<linux-kernel@...r.kernel.org>, <jeff.westfahl@...com>,
	<nathan.sullivan@...com>, <xander.huff@...com>,
	Lee Jones <lee.jones@...aro.org>
Subject: Re: [PATCH 1/2] misc: add nirtfeatures driver

On Mon, Mar 14, 2016 at 05:30:22PM -0500, Josh Cartwright wrote:
> On Mon, Mar 14, 2016 at 03:05:59PM -0700, Greg KH wrote:
> > On Mon, Mar 14, 2016 at 04:54:32PM -0500, Kyle Roeschley wrote:
> > > From: Jeff Westfahl <jeff.westfahl@...com>
> > > 
> > > This driver introduces support for hardware features of National
> > > Instruments real-time controllers. This is an ACPI device that exposes
> > > LEDs, switches, and watchdogs.
> > 
> > If it's an acpi driver, why not put it in drivers/acpi?
> 
> For the same reason we don't move all drivers for devices-on-a-PCI-bus
> into drivers/pci?
> 
> Drivers typically exist in the sourcetree with other drivers which
> implement similar functionality, which works great for devices with
> clear functional boundaries (GPIO controller drivers in drivers/gpio,
> led drivers in drivers/leds, etc. etc.); but for devices which are a
> hodgepodge of functionality, there isn't really a good fit anywhere
> except maybe in misc or mfd.
> 
> We could move it to mfd, but drivers in drivers/mfd which don't make use
> of MFD_CORE seems equally strange (although, I suppose there is
> precedent).  Maybe Lee has some thoughts.

Maybe drivers/platform? I notice several ACPI drivers there that also have grab
bags of functionality.

Regards,

Kyle Roeschley
National Instruments