From mboxrd@z Thu Jan 1 00:00:00 1970 From: Viresh Kumar Subject: Re: [PATCH] cpufreq: acpi_cpufreq: base frequency attribute support Date: Wed, 7 Oct 2015 22:53:43 +0530 Message-ID: <20151007172343.GE4557@linux> References: <1443738317-4224-1-git-send-email-srinivas.pandruvada@linux.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mail-pa0-f43.google.com ([209.85.220.43]:36207 "EHLO mail-pa0-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754254AbbJGRXs (ORCPT ); Wed, 7 Oct 2015 13:23:48 -0400 Received: by pablk4 with SMTP id lk4so27024346pab.3 for ; Wed, 07 Oct 2015 10:23:48 -0700 (PDT) Content-Disposition: inline In-Reply-To: <1443738317-4224-1-git-send-email-srinivas.pandruvada@linux.intel.com> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: Srinivas Pandruvada Cc: rafael.j.wysocki@intel.com, linux-pm@vger.kernel.org On 01-10-15, 15:25, Srinivas Pandruvada wrote: > Currently scaling_available_frequencies displays list of available > frequencies which can be used to set max/min or current scaling frequency. > > >cat scaling_available_frequencies > 2301000 2300000 2200000 2000000 1900000 1800000 1700000 1500000 1400000 > 1300000 1100000 1000000 900000 800000 600000 500000 > > Here traditionally it is assumed that only 2301000 is a turbo frequency, > which is purely opportunistic, anything else user can request and may > get it. > But because of configurable thermal design power implementation in several > Intel CPUs, the opportunistic frequency start can be any frequency in this > range. For example it can be 2300000 or any lower value. > This change adds an optional new attribute called "base_frequency", > which displays the max non-turbo frequency (base frequency). For example: > >cat base_frequency > 2200000 > This will allow user to choose a certain frequency which is not > opportunistic. > > Signed-off-by: Srinivas Pandruvada > --- > drivers/cpufreq/acpi-cpufreq.c | 34 ++++++++++++++++++++++++++++++++++ > 1 file changed, 34 insertions(+) Look for scaling_boost_frequencies_show() and see if you can reuse it. -- viresh