From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mika Westerberg Subject: Re: [PATCH 1/2] mmc: add functions to enable/disable aggressive clock gating Date: Wed, 17 Aug 2011 15:19:14 +0300 Message-ID: <20110817121914.GW16790@intel.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mga01.intel.com ([192.55.52.88]:6689 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752238Ab1HQMSl (ORCPT ); Wed, 17 Aug 2011 08:18:41 -0400 Content-Disposition: inline In-Reply-To: Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: Linus Walleij Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, cjb@laptop.org On Wed, Aug 17, 2011 at 09:51:31AM +0200, Linus Walleij wrote: > > I would suggest that in all patches using these functions, try > to replace: > > mmc_host_clk_disable() -> mmc_host_clk_ungate() > mmc_host_clk_enable() -> mmc_host_clk_gate() > Wow, that is indeed *much* cleaner way of doing this! One thing is that if I call these from those ios functions, mmc_host_clk_ungate() will always try to restore the clock even if there is really no need. Do you see this as a problem? > Please tell us if this works! Certainly. I'll try this overnight and see whether it works. > I understand that the names can be a bit confusing by but > I think you can convince yourself that what this will do is > simply increase the refcount host->clk_requests so the > clock is not gated across these sections. > > If you think the names of the functions are confusing then > you may rename them, say like this: > > mmc_host_clk_ungate() -> mmc_host_clk_hold() > mmc_host_clk_gate() -> mmc_host_clk_release() > > Which would make the usecases more clear, I'd be happy > to ACK a patch for this. I agree, I'll cook a patch for that also. Thanks for the comments.