From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tony Lindgren Subject: Re: PM regression with LED changes in next-20161109 Date: Thu, 10 Nov 2016 10:55:37 -0700 Message-ID: <20161110175537.GF27724@atomide.com> References: <20161109192301.GS26979@atomide.com> <28234714-3994-6747-9cf8-1ff0b3257f7a@gmail.com> <5bd5333e-0dbb-6333-0a48-ca4d3a990f9c@samsung.com> <20161110162925.GA28832@amd> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8BIT Return-path: Content-Disposition: inline In-Reply-To: <20161110162925.GA28832@amd> Sender: linux-kernel-owner@vger.kernel.org To: Pavel Machek Cc: Jacek Anaszewski , Hans de Goede , Jacek Anaszewski , linux-leds@vger.kernel.org, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Darren Hart List-Id: linux-omap@vger.kernel.org * Pavel Machek [161110 09:29]: > Hi! > > > >>>Looks like commit 883d32ce3385 ("leds: core: Add support for poll()ing > > >>>the sysfs brightness attr for changes.") breaks runtime PM for me. > > >>> > > >>>On my omap dm3730 based test system, idle power consumption is over 70 > > >>>times higher now with this patch! It goes from about 6mW for the core > > >>>system to over 440mW during idle meaning there's some busy timer now > > >>>active. > > >>> > > >>>Reverting this patch fixes the issue. Any ideas? > > Are you using any LED that toggles with high frequency? Like perhaps > LED that is lit when CPU is active? Yeah one of them seems to have cpu0 as the default trigger. Tony