Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754484Ab0KISY1 (ORCPT ); Tue, 9 Nov 2010 13:24:27 -0500 Received: from opensource.wolfsonmicro.com ([80.75.67.52]:59815 "EHLO opensource2.wolfsonmicro.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752166Ab0KISYY (ORCPT ); Tue, 9 Nov 2010 13:24:24 -0500 From: Mark Brown To: Len Brown , Pavel Machek , "Rafael J. Wysocki" , Nishanth Menon Cc: linux-pm@lists.linux-foundation.org, linux-kernel@vger.kernel.org, patches@opensource.wolfsonmicro.com, Mark Brown Subject: [PATCH] PM: Hide OPP configuration when SoCs do not provide an implementation Date: Tue, 9 Nov 2010 18:24:16 +0000 Message-Id: <1289327056-27950-1-git-send-email-broonie@opensource.wolfsonmicro.com> X-Mailer: git-send-email 1.7.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1956 Lines: 51 Since the OPP API is only useful with an appropraite SoC-specific implementation there is no point in offering the ability to enable the API on general systems. Provide an ARCH_HAS OPP Kconfig symbol which masks out the option unless selected by an implementation. Signed-off-by: Mark Brown --- Documentation/power/opp.txt | 3 +++ kernel/power/Kconfig | 4 ++++ 2 files changed, 7 insertions(+), 0 deletions(-) diff --git a/Documentation/power/opp.txt b/Documentation/power/opp.txt index 44d87ad..cd44558 100644 --- a/Documentation/power/opp.txt +++ b/Documentation/power/opp.txt @@ -37,6 +37,9 @@ Typical usage of the OPP library is as follows: SoC framework -> modifies on required cases certain OPPs -> OPP layer -> queries to search/retrieve information -> +Architectures that provide a SoC framework for OPP should select ARCH_HAS_OPP +to make the OPP layer available. + OPP layer expects each domain to be represented by a unique device pointer. SoC framework registers a set of initial OPPs per device with the OPP layer. This list is expected to be an optimally small number typically around 5 per device. diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig index 29bff61..a5aff3e 100644 --- a/kernel/power/Kconfig +++ b/kernel/power/Kconfig @@ -246,9 +246,13 @@ config PM_OPS depends on PM_SLEEP || PM_RUNTIME default y +config ARCH_HAS_OPP + bool + config PM_OPP bool "Operating Performance Point (OPP) Layer library" depends on PM + depends on ARCH_HAS_OPP ---help--- SOCs have a standard set of tuples consisting of frequency and voltage pairs that the device will support per voltage domain. This -- 1.7.1 -- 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/