From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrzej Hajda Subject: Re: [RFD] Functional dependencies between devices Date: Tue, 24 Nov 2015 14:56:45 +0100 Message-ID: <56546C9D.3090206@samsung.com> References: <1623682.7KVblAB3KQ@vostro.rjw.lan> <564B224D.3050904@samsung.com> <20151117135549.GR31303@sirena.org.uk> <564D7145.40300@samsung.com> <20151121140428.GJ26072@sirena.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Return-path: In-reply-to: <20151121140428.GJ26072@sirena.org.uk> Sender: linux-kernel-owner@vger.kernel.org To: Mark Brown Cc: "Rafael J. Wysocki" , Linux PM list , Greg Kroah-Hartman , Linux Kernel Mailing List , Alan Stern , Grant Likely , Rob Herring , Tomeu Vizoso , Thierry Reding , Dmitry Torokhov , Geert Uytterhoeven , Michael Turquette List-Id: linux-pm@vger.kernel.org On 11/21/2015 03:04 PM, Mark Brown wrote: > On Thu, Nov 19, 2015 at 07:50:45AM +0100, Andrzej Hajda wrote: >> On 11/17/2015 02:55 PM, Mark Brown wrote: >>> This is going to be really common but I'm not sure I see a problem with >>> it in terms of what Raphael is proposing - could you go into more detail >>> on the problem you see here? >> If clock provider is not a device driver and it depends on clocks of >> another clock >> provider you cannot 'translate' this dependency as dependency between >> devices, > What makes you say that this is the case? There should be nothing > stopping us having dependencies between two devices of the same type. To be clear I described situation that one clock provider uses clock of another clock provider and consumer is not modeled as device. > >> so this RFD does not cover them. >> Additionally if you look into kernel there are many calls in form >> 'clk_get(NULL, name)', >> it suggests that not only clock providers are consumers without >> underlying device driver. > Like I said in my earlier reply: > > | > - many clock providers, irq domains are not provided by devices, > > | That seems like something we can and possibly should change if we want. > > This applies just as much to consumers as to providers. OK, then it is just something to do :) Regards Andrzej