From mboxrd@z Thu Jan 1 00:00:00 1970 From: tony@atomide.com (Tony Lindgren) Date: Thu, 10 Nov 2016 10:55:37 -0700 Subject: PM regression with LED changes in next-20161109 In-Reply-To: <20161110162925.GA28832@amd> References: <20161109192301.GS26979@atomide.com> <28234714-3994-6747-9cf8-1ff0b3257f7a@gmail.com> <5bd5333e-0dbb-6333-0a48-ca4d3a990f9c@samsung.com> <20161110162925.GA28832@amd> Message-ID: <20161110175537.GF27724@atomide.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.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