From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752485AbaIISlp (ORCPT ); Tue, 9 Sep 2014 14:41:45 -0400 Received: from mail-pa0-f54.google.com ([209.85.220.54]:63631 "EHLO mail-pa0-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752446AbaIISln (ORCPT ); Tue, 9 Sep 2014 14:41:43 -0400 Date: Tue, 9 Sep 2014 11:41:31 -0700 From: Nicolin Chen To: Mark Brown Cc: Shengjiu Wang , timur@tabi.org, Li.Xiubo@freescale.com, lgirdwood@gmail.com, perex@perex.cz, tiwai@suse.de, alsa-devel@alsa-project.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH V1] ASoC: fsl_ssi: refine ipg clock usage in this module Message-ID: <20140909184130.GB6944@Asurada> References: <20140909112750.GS2601@sirena.org.uk> <20140909180309.GA6784@Asurada> <20140909181516.GI2601@sirena.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20140909181516.GI2601@sirena.org.uk> User-Agent: Mutt/1.5.22 (2013-10-16) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Sep 09, 2014 at 07:15:16PM +0100, Mark Brown wrote: > On Tue, Sep 09, 2014 at 11:03:10AM -0700, Nicolin Chen wrote: > > On Tue, Sep 09, 2014 at 12:27:50PM +0100, Mark Brown wrote: > > > On Tue, Sep 09, 2014 at 05:18:07PM +0800, Shengjiu Wang wrote: > > > > - ssi_private->clk = devm_clk_get(&pdev->dev, NULL); > > > > + ssi_private->clk = devm_clk_get(&pdev->dev, "ipg"); > > > > Why is this change being made? It wasn't mentioned in the commit log > > > and doesn't seem relevant to moving where the enable and disable are > > > done which is what the patch is supposed to be doing... > > > I think Shengjiu is trying to keep the clock disabled while SSI's idle. > > The current driver enables ipg clock anyway even if there's no stream > > running. > > > Apparently, these should be put into the comment log. > > I got that bit. However as well as changing where the enable and > disable take place this is also changing from requesting a clock with a > NULL to requesting one called "ipg". Understood. Making one patch do one single change is the rule we should always follow.