From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sascha Hauer Subject: Re: [PATCH 3/5] soc: Mediatek: Add SCPSYS power domain driver Date: Wed, 20 May 2015 16:03:25 +0200 Message-ID: <20150520140325.GN6325@pengutronix.de> References: <1431372206-1237-1-git-send-email-s.hauer@pengutronix.de> <1431372206-1237-4-git-send-email-s.hauer@pengutronix.de> <20150519103010.GA6325@pengutronix.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org To: Matthias Brugger Cc: Daniel Kurtz , "linux-arm-kernel@lists.infradead.org" , "open list:OPEN FIRMWARE AND..." , Kevin Hilman , "linux-kernel@vger.kernel.org" , linux-mediatek@lists.infradead.org, Sasha Hauer , "Rafael J. Wysocki" , Ulf Hansson List-Id: devicetree@vger.kernel.org On Tue, May 19, 2015 at 01:06:10PM +0200, Matthias Brugger wrote: > 2015-05-19 12:30 GMT+02:00 Sascha Hauer : > > > > I'll check for errors next round. However, I cannot bail out in this > > case since once pm_genpd_init() is called the domain cannot be > > unregistered anymore. > > We should think of implementing this. > I had a quick look on it, and from what I understand as long as you > don't have any subdomains, devices and masters added, it's just > deleting an element from a linked list. In my error path I would have subdomains added though, so I would need that to be handled. > Maybe we should split this in pm_genpd_prepare and pm_genpd_add, with > the last one actually adding the generic_pm_domain to gpd_list. > > This way we could also get rid of the two for loops. Well, with pm_genpd_prepare and pm_genpd_add I would still need two loops, one for preparing and one for adding. I'm not sure how useful it really is to be able to unregister power domains. For now I suggest to continue with the domains that are successfully registered. I'll look into it should the pm domain maintainers request it. Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |