From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Brown Subject: Re: [PATCH V4 6/9] ARM: mxs: Provide regulator to pwm-backlight Date: Wed, 20 Mar 2013 09:23:18 +0100 Message-ID: <20130320082318.GA28775@opensource.wolfsonmicro.com> References: <1363719573-20926-1-git-send-email-achew@nvidia.com> <1363719573-20926-7-git-send-email-achew@nvidia.com> <201303192227.21717.marex@denx.de> <5148E252.9050900@wwwdotorg.org> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============6885556834544931844==" Return-path: In-Reply-To: <5148E252.9050900@wwwdotorg.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Stephen Warren Cc: romain.naour@openwide.fr, thierry.reding@avionic-design.de, philipp.zabel@gmail.com, gxt@mprc.pku.edu.cn, robert.jarzmik@free.fr, laforge@openezx.org, Marek Vasut , kgene.kim@samsung.com, linux@arm.linux.org.uk, linux-samsung-soc@vger.kernel.org, lost.distance@yahoo.com, drwyrm@gmail.com, haojian.zhuang@gmail.com, openezx-devel@lists.openezx.org, acourbot@nvidia.com, linux-tegra@vger.kernel.org, eric.y.miao@gmail.com, linux-arm-kernel@lists.infradead.org, stefan@openezx.org, Andrew Chew , kyungmin.park@samsung.com, shawn.guo@linaro.org List-Id: linux-tegra@vger.kernel.org --===============6885556834544931844== Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="UlVJffcvxoiEqYs2" Content-Disposition: inline --UlVJffcvxoiEqYs2 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Tue, Mar 19, 2013 at 04:10:26PM -0600, Stephen Warren wrote: > On 03/19/2013 03:27 PM, Marek Vasut wrote: > > Do we really need a mandatory regulator? Why can't it be optional? > IIRC, the previous advice I've seen is that if a device (driver) uses a > regulator, it must /require/ a regulator, and if a particular board > doesn't actually have a SW-controlled regulator, then a fixed- or dummy- > regulator should be provided to satisfy this requirement. > CC'ing Mark Brown to make sure I really do Recall Correctly. Yes, and it should be fixed rather than dummy. The issue is partly that it's probably important that the device has power so we don't want to just ignore errors and partly that this is something which applies to essentially all devices so whatever we do for this case ought to be done by the core so all devices can benefit and we don't have to duplicate lots of code in individual drivers. --UlVJffcvxoiEqYs2 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQIcBAEBAgAGBQJRSXHaAAoJELSic+t+oim95cwP/RmgDDdz+rwCH+YppduQfcvK d9b9NrEoOhJ+vL2urIpFkc6bESDLc9ObNaisxxFQHS578izScMHSeTvbErEtUAUk 1BejUpKHL5eF8s8vev1+VRGo8uKML5O5PJQ9yrVRif/Xd9jpHmuc64BriwAH7FVO iDMVQwMzeUmF0eWAmqYecn/kuiAfUJNatrGQvok+8Y81tanD4R1jaVRl0sIOqfpG QChAtMuiSn9ETY6MCmbGv1SDZCGTHVW3Y438qW7LRu6B5/2nyZYNMW3Iq3KgGm2T 8oMAWnA9AqxFYF1dHwpfuNPwqGRnYqDloXWEgoVFPrEjfo0UpRM0WQ8VSYqlYNw5 euryMoLnOPSjuKFX/CS0OBCojOVilxvWM4FTYbTb5N8ICqnKyYIyWcN4P96thYfp OereYXdzma5TaoQ3GykvYSIzZnsVItKVqnhd89F3pfzzjsfwdZ9Xt89OdOUEi7+1 z2HvsVPnPaUcybZNlNVotMG9l7SRXhPO64PbAJ8B4ZdL7YHJTJ7GulIEV48uWPV+ ZO4ywW7yZu2ypM1zNWZnz4i9aV4twLk9UfiWo4iEoZvEfZJmBF1Trr3P42DRfeuH 67QmFDQmKCiP08BobQb+FOnZF4UF6GM3319DJRM1VFIMbdlyknxZ3QDQd9A46Ja2 06tmbG6tkTIsb7DXQK42 =Eci5 -----END PGP SIGNATURE----- --UlVJffcvxoiEqYs2-- --===============6885556834544931844== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel --===============6885556834544931844==--