From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Boyd Subject: Re: [PATCH V3 14/16] cpufreq: Allow drivers to enable boost support after registering driver Date: Thu, 30 Jul 2015 23:12:38 -0700 Message-ID: <20150731061238.GN3159@codeaurora.org> References: <98379f9625b9cc8ade2e052c29e86c29e11cea5e.1438166099.git.viresh.kumar@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from smtp.codeaurora.org ([198.145.29.96]:37059 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750957AbbGaGMk (ORCPT ); Fri, 31 Jul 2015 02:12:40 -0400 Content-Disposition: inline In-Reply-To: <98379f9625b9cc8ade2e052c29e86c29e11cea5e.1438166099.git.viresh.kumar@linaro.org> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: Viresh Kumar Cc: Rafael Wysocki , linaro-kernel@lists.linaro.org, linux-pm@vger.kernel.org, rob.herring@linaro.org, arnd.bergmann@linaro.org, nm@ti.com, broonie@kernel.org, mturquette@baylibre.com, Sudeep.Holla@arm.com, viswanath.puttagunta@linaro.org, l.stach@pengutronix.de, thomas.petazzoni@free-electrons.com, linux-arm-kernel@lists.infradead.org, ta.omasab@gmail.com, kesavan.abhilash@gmail.com, khilman@linaro.org, santosh.shilimkar@oracle.com, b.zolnierkie@samsung.com, open list On 07/29, Viresh Kumar wrote: > In some cases it wouldn't be known at time of driver registration, if > the driver needs to support boost frequencies. > > For example, while getting boost information from DT with opp-v2 > bindings, we need to parse the bindings for all the CPUs to know if > turbo/boost OPPs are supported or not. > > One way out to do that efficiently is to delay supporting boost mode > (i.e. creating /sys/devices/system/cpu/cpufreq/boost file), until the > time OPP bindings are parsed. > > At that point, the driver can enable boost support. This can be done at > ->init(), where the frequency table is created. > > To do that, the driver requires few APIs from cpufreq core that let him > do this. This patch provides these APIs. > > Signed-off-by: Viresh Kumar > --- Reviewed-by: Stephen Boyd -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project