Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753021AbaFRPiB (ORCPT ); Wed, 18 Jun 2014 11:38:01 -0400 Received: from avon.wwwdotorg.org ([70.85.31.133]:56901 "EHLO avon.wwwdotorg.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752128AbaFRPh7 (ORCPT ); Wed, 18 Jun 2014 11:37:59 -0400 Message-ID: <53A1B252.1030204@wwwdotorg.org> Date: Wed, 18 Jun 2014 09:37:54 -0600 From: Stephen Warren User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0 MIME-Version: 1.0 To: Peter De Schrijver , Thierry Reding CC: Mikko Perttunen , "tj@kernel.org" , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "linux-tegra@vger.kernel.org" , "linux-ide@vger.kernel.org" Subject: Re: [PATCH 6/9] ARM: tegra: Export tegra_powergate_power_on References: <1401881559-18469-1-git-send-email-mperttunen@nvidia.com> <1401881559-18469-7-git-send-email-mperttunen@nvidia.com> <539F691E.5030204@wwwdotorg.org> <20140617121313.GE18816@ulmo> <20140617140146.GH3407@tbergstrom-lnx.Nvidia.com> <20140617215119.GC24743@mithrandir> <20140618121806.GJ3407@tbergstrom-lnx.Nvidia.com> In-Reply-To: <20140618121806.GJ3407@tbergstrom-lnx.Nvidia.com> X-Enigmail-Version: 1.5.2 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 06/18/2014 06:18 AM, Peter De Schrijver wrote: > On Tue, Jun 17, 2014 at 11:51:20PM +0200, Thierry Reding wrote: >> * PGP Signed by an unknown key >> >> On Tue, Jun 17, 2014 at 05:01:46PM +0300, Peter De Schrijver wrote: >>> On Tue, Jun 17, 2014 at 02:13:15PM +0200, Thierry Reding wrote: >>>>> Old Signed by an unknown key >>>> >>>> On Mon, Jun 16, 2014 at 04:01:02PM -0600, Stephen Warren wrote: >>>>> On 06/04/2014 05:32 AM, Mikko Perttunen wrote: >>>>>> This symbol needs to be exported to power on rails without using >>>>>> tegra_powergate_sequence_power_up. tegra_powergate_sequence_power_up >>>>>> cannot be used in situations where the driver wants to handle clocking >>>>>> by itself. >>>>> >>>>> Thierry, are you OK with this change? >>>> >>>> I would've preferred tegra_powergate_sequence_power_up() to be used >>> >>> I don't think the current tegra_powergate_sequence_power_up() API is very well >>> defined though. I don't think the clocks and resets required by the sequence >>> should be provided by the driver. For one, there can be several clocks and >>> resets that need to be controlled for a single domain. >> >> Do you have any suggestions for what the API should look like? Even if >> we plan to move to some different API, I think there's some advantage in >> using it consistently if for no other reason than to make it easier to >> replace occurrences later on. >> > > I think the API should only have the domain ID as input so: > > int tegra_powerdomain_on(int id) > > /* > * Prerequisites: domain is off > * Result: domain is on, clocks of the modules in the domain are off, modules are in reset > */ > > int tegra_powerdomain_off(int id) > > /* > * Prerequisites: all clocks of the modules in the domain are off > * result: domain is off > */ That doesn't make sense; the PMC doesn't have access to the clock and reset IDs - that's why the API requires them to be passed in. -- 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/