Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932646AbaFKQIa (ORCPT ); Wed, 11 Jun 2014 12:08:30 -0400 Received: from mezzanine.sirena.org.uk ([106.187.55.193]:37273 "EHLO mezzanine.sirena.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755864AbaFKQIM (ORCPT ); Wed, 11 Jun 2014 12:08:12 -0400 Date: Wed, 11 Jun 2014 17:07:26 +0100 From: Mark Brown To: Matt Porter Cc: Jassi Brar , Sudeep Holla , Jassi Brar , Arnd Bergmann , lkml , Greg Kroah-Hartman , "Anna, Suman" , Loic Pallardy , LeyFoon Tan , Craig McGeachie , Courtney Cavin , Rob Herring , Josh Cartwright , Linus Walleij , Kumar Gala , "ks.giri@samsung.com" , Devicetree List Message-ID: <20140611160726.GJ5099@sirena.org.uk> References: <1400134260-3962-1-git-send-email-jaswinder.singh@linaro.org> <7978295.UBGxYvcnvH@wuerfel> <20140529154348.GH32082@beef> <20140602151454.GK32082@beef> <20140605111205.GD32082@beef> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="oQ95xoC0NK0Hccgk" Content-Disposition: inline In-Reply-To: <20140605111205.GD32082@beef> X-Cookie: Ditat Deus. User-Agent: Mutt/1.5.23 (2014-03-12) X-SA-Exim-Connect-IP: 94.175.94.161 X-SA-Exim-Mail-From: broonie@sirena.org.uk Subject: Re: [PATCHv5 2/4] mailbox: Introduce framework for mailbox X-SA-Exim-Version: 4.2.1 (built Mon, 26 Dec 2011 16:24:06 +0000) X-SA-Exim-Scanned: Yes (on mezzanine.sirena.org.uk) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --oQ95xoC0NK0Hccgk Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Thu, Jun 05, 2014 at 07:12:05AM -0400, Matt Porter wrote: > On Tue, Jun 03, 2014 at 03:51:55PM +0530, Jassi Brar wrote: > > BTW, here we at least have a hardware resource to specify in the DT > > node, there are examples in kernel where the DT nodes are purely > > virtual. For ex, grep for "linux,spdif-dit". So I think we should be > > ok. > There's a bit of a difference between my concern over a virtual node and > this example you've cited. In the dummy spdif transmitter, it's defining > a virtual device that plugs in for a codec, a hardware concept well > defined in the audio bindings. I agree that there are many examples of > this type of virtual node, including dummy phys, but in all cases they > are stubbing out a real hardware concept. Well, really it's an actual physical thing - it's something that appears in the schematic and can be pointed at on the board but just doesn't have software control. From that point of view if the software that's being interacted with on the remote processor is in ROM/flash which won't or can't be realistically be updated (which seems to be mostly the case) then you can reasonably say the same thing. --oQ95xoC0NK0Hccgk Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBAgAGBQJTmH67AAoJELSic+t+oim9Bt8P/160qN+CPShJ28IiDzmny6PA AVGJksSE68Q5wbWYyvV0058YND8nksw1E9fm+QeXMjNyk8Et2p/Wle882EIMRo6b BgpiMxz5yU1Pl49VEUmhit9HIbt0Fi/acibc2YcDHmcxNxjyiuMPC9FL6as9ZBs/ fAkjSL3CXsQaKBhVj5QVJdsvgU7/i1GPrF9wH820NAXDXqDY2aDbKKAFPEV/xJby 03GZ6nrF00+ql2lerazQNqtvPljmEjbU/sLsdO0zdjXnfgZdUtRkILnOBiYT2q+b 0GK9FoNG5LqihQ47I2qa6s0UMyWmPVHgLr5G641845TuGIWnsJrdPB4wF7AkP9Co bT2ozwOhm4tAK/rsLYUX6WVVX7LSyAN9LgdxouVT6Lr6xwkMgREPJVFFzQ2VKfJf uSFhNyXyZZzgxuX1JHQkIxq7/sPRp5EYyoIKf0RDJZfu/wnp6PBNu3B1VAKvhEzQ bCFJen+MG3O+tDgts37qIewR4yErUXwN3zBtnZ6JvTJ/eA5tPo24/E+IAuiyBWK0 6zJmcqK7OIRK9iaAmpju9RMTuPzfxNFKosqPENpaJn/5h9vm+VZpCkukFtCvlBmD zL4HkyI+hEa8iir46jdhNnMG2QzwBs2m26KIHvT6NWKNuKPpbUDJJ/krD/paiDkB NTQ6gRwb2wI8LWiLr5LE =UeEw -----END PGP SIGNATURE----- --oQ95xoC0NK0Hccgk-- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/