Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751352AbbG3NYW (ORCPT ); Thu, 30 Jul 2015 09:24:22 -0400 Received: from mail-yk0-f169.google.com ([209.85.160.169]:34916 "EHLO mail-yk0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750744AbbG3NYT (ORCPT ); Thu, 30 Jul 2015 09:24:19 -0400 MIME-Version: 1.0 In-Reply-To: References: From: Rob Herring Date: Thu, 30 Jul 2015 08:23:59 -0500 Message-ID: Subject: Re: [PATCH V3 01/16] PM / OPP: Update bindings to make opp-hz a 64 bit value To: Viresh Kumar Cc: Rafael Wysocki , Stephen Boyd , "linaro-kernel@lists.linaro.org" , "linux-pm@vger.kernel.org" , Arnd Bergmann , Nishanth Menon , Mark Brown , Michael Turquette , Sudeep Holla , Viswanath Puttagunta , Lucas Stach , Thomas Petazzoni , "linux-arm-kernel@lists.infradead.org" , Thomas Abraham , Abhilash Kesavan , Kevin Hilman , Santosh Shilimkar , Bartlomiej Zolnierkiewicz , "devicetree@vger.kernel.org" , Ian Campbell , Kumar Gala , open list , Mark Rutland , Pawel Moll , "Rafael J. Wysocki" , Rob Herring Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 8184 Lines: 195 On Wed, Jul 29, 2015 at 5:52 AM, Viresh Kumar wrote: > With a 32 bit value, the maximum frequency that the bindings can > support is ~ 4 GHz. And that might fall short of what newer systems may > have. 4GHz should be fast enough for anyone... > Allow opp-hz to be a 64 bit big-endian value. > > Cc: Rob Herring Acked-by: Rob Herring > Cc: devicetree@vger.kernel.org > Suggested-by: Stephen Boyd > Suggested-by: Bartlomiej Zolnierkiewicz > Signed-off-by: Viresh Kumar > --- > Documentation/devicetree/bindings/power/opp.txt | 40 ++++++++++++------------- > 1 file changed, 20 insertions(+), 20 deletions(-) > > diff --git a/Documentation/devicetree/bindings/power/opp.txt b/Documentation/devicetree/bindings/power/opp.txt > index 0d5e7c978121..0cb44dc21f97 100644 > --- a/Documentation/devicetree/bindings/power/opp.txt > +++ b/Documentation/devicetree/bindings/power/opp.txt > @@ -88,7 +88,7 @@ This defines voltage-current-frequency combinations along with other related > properties. > > Required properties: > -- opp-hz: Frequency in Hz > +- opp-hz: Frequency in Hz, expressed as a 64-bit big-endian integer. > > Optional properties: > - opp-microvolt: voltage in micro Volts. > @@ -158,20 +158,20 @@ Example 1: Single cluster Dual-core ARM cortex A9, switch DVFS states together. > opp-shared; > > opp00 { > - opp-hz = <1000000000>; > + opp-hz = /bits/ 64 <1000000000>; > opp-microvolt = <970000 975000 985000>; > opp-microamp = <70000>; > clock-latency-ns = <300000>; > opp-suspend; > }; > opp01 { > - opp-hz = <1100000000>; > + opp-hz = /bits/ 64 <1100000000>; > opp-microvolt = <980000 1000000 1010000>; > opp-microamp = <80000>; > clock-latency-ns = <310000>; > }; > opp02 { > - opp-hz = <1200000000>; > + opp-hz = /bits/ 64 <1200000000>; > opp-microvolt = <1025000>; > clock-latency-ns = <290000>; > turbo-mode; > @@ -237,20 +237,20 @@ independently. > */ > > opp00 { > - opp-hz = <1000000000>; > + opp-hz = /bits/ 64 <1000000000>; > opp-microvolt = <970000 975000 985000>; > opp-microamp = <70000>; > clock-latency-ns = <300000>; > opp-suspend; > }; > opp01 { > - opp-hz = <1100000000>; > + opp-hz = /bits/ 64 <1100000000>; > opp-microvolt = <980000 1000000 1010000>; > opp-microamp = <80000>; > clock-latency-ns = <310000>; > }; > opp02 { > - opp-hz = <1200000000>; > + opp-hz = /bits/ 64 <1200000000>; > opp-microvolt = <1025000>; > opp-microamp = <90000; > lock-latency-ns = <290000>; > @@ -313,20 +313,20 @@ DVFS state together. > opp-shared; > > opp00 { > - opp-hz = <1000000000>; > + opp-hz = /bits/ 64 <1000000000>; > opp-microvolt = <970000 975000 985000>; > opp-microamp = <70000>; > clock-latency-ns = <300000>; > opp-suspend; > }; > opp01 { > - opp-hz = <1100000000>; > + opp-hz = /bits/ 64 <1100000000>; > opp-microvolt = <980000 1000000 1010000>; > opp-microamp = <80000>; > clock-latency-ns = <310000>; > }; > opp02 { > - opp-hz = <1200000000>; > + opp-hz = /bits/ 64 <1200000000>; > opp-microvolt = <1025000>; > opp-microamp = <90000>; > clock-latency-ns = <290000>; > @@ -339,20 +339,20 @@ DVFS state together. > opp-shared; > > opp10 { > - opp-hz = <1300000000>; > + opp-hz = /bits/ 64 <1300000000>; > opp-microvolt = <1045000 1050000 1055000>; > opp-microamp = <95000>; > clock-latency-ns = <400000>; > opp-suspend; > }; > opp11 { > - opp-hz = <1400000000>; > + opp-hz = /bits/ 64 <1400000000>; > opp-microvolt = <1075000>; > opp-microamp = <100000>; > clock-latency-ns = <400000>; > }; > opp12 { > - opp-hz = <1500000000>; > + opp-hz = /bits/ 64 <1500000000>; > opp-microvolt = <1010000 1100000 1110000>; > opp-microamp = <95000>; > clock-latency-ns = <400000>; > @@ -379,7 +379,7 @@ Example 4: Handling multiple regulators > opp-shared; > > opp00 { > - opp-hz = <1000000000>; > + opp-hz = /bits/ 64 <1000000000>; > opp-microvolt = <970000>, /* Supply 0 */ > <960000>, /* Supply 1 */ > <960000>; /* Supply 2 */ > @@ -392,7 +392,7 @@ Example 4: Handling multiple regulators > /* OR */ > > opp00 { > - opp-hz = <1000000000>; > + opp-hz = /bits/ 64 <1000000000>; > opp-microvolt = <970000 975000 985000>, /* Supply 0 */ > <960000 965000 975000>, /* Supply 1 */ > <960000 965000 975000>; /* Supply 2 */ > @@ -405,7 +405,7 @@ Example 4: Handling multiple regulators > /* OR */ > > opp00 { > - opp-hz = <1000000000>; > + opp-hz = /bits/ 64 <1000000000>; > opp-microvolt = <970000 975000 985000>, /* Supply 0 */ > <960000 965000 975000>, /* Supply 1 */ > <960000 965000 975000>; /* Supply 2 */ > @@ -437,12 +437,12 @@ Example 5: Multiple OPP tables > opp-shared; > > opp00 { > - opp-hz = <600000000>; > + opp-hz = /bits/ 64 <600000000>; > ... > }; > > opp01 { > - opp-hz = <800000000>; > + opp-hz = /bits/ 64 <800000000>; > ... > }; > }; > @@ -453,12 +453,12 @@ Example 5: Multiple OPP tables > opp-shared; > > opp10 { > - opp-hz = <1000000000>; > + opp-hz = /bits/ 64 <1000000000>; > ... > }; > > opp11 { > - opp-hz = <1100000000>; > + opp-hz = /bits/ 64 <1100000000>; > ... > }; > }; > -- > 2.4.0 > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/