From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sudeep Holla Subject: Re: [PATCH v2 2/2] Documentation: devicetree: Add boost-frequency binding to list boost mode frequency Date: Fri, 07 Feb 2014 16:28:45 +0000 Message-ID: <52F509BD.70903@arm.com> References: <1391786342-11812-1-git-send-email-thomas.ab@samsung.com> <1391786342-11812-3-git-send-email-thomas.ab@samsung.com> <52F50698.4060305@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=WINDOWS-1252 Content-Transfer-Encoding: 8BIT Return-path: In-Reply-To: <52F50698.4060305@arm.com> Sender: linux-samsung-soc-owner@vger.kernel.org To: Thomas Abraham , "linux-pm@vger.kernel.org" , "devicetree@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" Cc: Sudeep Holla , "rjw@rjwysocki.net" , "linux-samsung-soc@vger.kernel.org" , "kgene.kim@samsung.com" , "t.figa@samsung.com" , "l.majewski@samsung.com" , "viresh.kumar@linaro.org" , "thomas.ab@samsung.com" , Nishanth Menon , Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala List-Id: devicetree@vger.kernel.org On 07/02/14 16:15, Sudeep Holla wrote: > On 07/02/14 15:19, Thomas Abraham wrote: >> From: Thomas Abraham >> >> Add a new optional boost-frequency binding for specifying the frequencies >> usable in boost mode. >> >> Cc: Nishanth Menon >> Cc: Lukasz Majewski >> Cc: Rob Herring >> Cc: Pawel Moll >> Cc: Mark Rutland >> Cc: Ian Campbell >> Cc: Kumar Gala >> Signed-off-by: Thomas Abraham >> --- >> Documentation/devicetree/bindings/cpufreq/cpufreq-boost.txt | 11 +++++++++++ >> 1 file changed, 11 insertions(+) >> create mode 100644 Documentation/devicetree/bindings/cpufreq/cpufreq-boost.txt >> >> diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-boost.txt b/Documentation/devicetree/bindings/cpufreq/cpufreq-boost.txt >> new file mode 100644 >> index 0000000..d925e38 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-boost.txt >> @@ -0,0 +1,11 @@ >> +* Device tree binding for CPU boost frequency (aka over-clocking) >> + >> +Certain CPU's can be operated in optional 'boost' mode (or sometimes referred as >> +overclocking) in which the CPU can operate in frequencies beyond the normal >> +operating conditions. >> + >> +Optional Properties: >> +- boost-frequency: list of frequencies in KHz to be used only in boost mode. >> + This list should be a subset of frequencies listed in "operating-points" >> + property. Refer to Documentation/devicetree/bindings/power/opp.txt for >> + details about "operating-points" property. >> > > Won't single entry for boost frequency suffice which would be the starting > frequency in the boost range. IOW will there be OPP list with frequencies: > A > B > C > D, but only B and C are boost frequency. That seems little odd, > unless it's some configuration chosen purely on software basis rather than > hardware. For me B marks the beginning of over-clocking. > Ah, I meant A < B < C < D in the above example. Regards, Sudeep