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Date: Fri, 18 Dec 2020 10:08:54 -0400 From: Jason Gunthorpe <jgg@...dia.com> To: Mark Brown <broonie@...nel.org> CC: Greg KH <gregkh@...uxfoundation.org>, Alexandre Belloni <alexandre.belloni@...tlin.com>, Dan Williams <dan.j.williams@...el.com>, Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>, <alsa-devel@...a-project.org>, Kiran Patil <kiran.patil@...el.com>, linux-rdma <linux-rdma@...r.kernel.org>, Shiraz Saleem <shiraz.saleem@...el.com>, Martin Habets <mhabets@...arflare.com>, "Liam Girdwood" <lgirdwood@...il.com>, Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>, Fred Oh <fred.oh@...ux.intel.com>, "Dave Ertman" <david.m.ertman@...el.com>, Jakub Kicinski <kuba@...nel.org>, Netdev <netdev@...r.kernel.org>, Leon Romanovsky <leonro@...dia.com>, David Miller <davem@...emloft.net>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Parav Pandit <parav@...lanox.com>, <lee.jones@...aro.org> Subject: Re: [resend/standalone PATCH v4] Add auxiliary bus support On Fri, Dec 18, 2020 at 01:17:09PM +0000, Mark Brown wrote: > As previously discussed this will need the auxilliary bus extending to > support at least interrupts and possibly also general resources. I thought the recent LWN article summed it up nicely, auxillary bus is for gluing to subsystems together using a driver specific software API to connect to the HW, MFD is for splitting a physical HW into disjoint regions of HW. Maybe there is some overlap, but if you want to add HW representations to the general auxillary device then I think you are using it for the wrong thing. Jason
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