From patchwork Tue Feb 11 14:17:51 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lorenzo Pieralisi X-Patchwork-Id: 3627421 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 4DCBFBF418 for ; Tue, 11 Feb 2014 14:22:40 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 22FA6201F4 for ; Tue, 11 Feb 2014 14:22:39 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 15D4F201EF for ; Tue, 11 Feb 2014 14:22:38 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1WDEEK-0003lc-G0; Tue, 11 Feb 2014 14:22:32 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1WDE9S-0004J2-Gl; Tue, 11 Feb 2014 14:17:30 +0000 Received: from service87.mimecast.com ([91.220.42.44]) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1WDE9O-0004Gp-Ug for linux-arm-kernel@lists.infradead.org; Tue, 11 Feb 2014 14:17:27 +0000 Received: from cam-owa1.Emea.Arm.com (fw-tnat.cambridge.arm.com [217.140.96.21]) by service87.mimecast.com; Tue, 11 Feb 2014 14:17:03 +0000 Received: from red-moon.cambridge.arm.com ([10.1.255.212]) by cam-owa1.Emea.Arm.com with Microsoft SMTPSVC(6.0.3790.3959); Tue, 11 Feb 2014 14:17:02 +0000 From: Lorenzo Pieralisi To: devicetree@vger.kernel.org Subject: [PATCH RFC v3 1/3] Documentation: devicetree: psci: define CPU suspend parameter Date: Tue, 11 Feb 2014 14:17:51 +0000 Message-Id: <1392128273-8614-2-git-send-email-lorenzo.pieralisi@arm.com> X-Mailer: git-send-email 1.8.4 In-Reply-To: <1392128273-8614-1-git-send-email-lorenzo.pieralisi@arm.com> References: <1392128273-8614-1-git-send-email-lorenzo.pieralisi@arm.com> X-OriginalArrivalTime: 11 Feb 2014 14:17:02.0896 (UTC) FILETIME=[EF51BB00:01CF2733] X-MC-Unique: 114021114170319201 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140211_091727_183103_286FC712 X-CRM114-Status: UNSURE ( 9.35 ) X-CRM114-Notice: Please train this message. X-Spam-Score: 0.4 (/) Cc: Mark Rutland , Mike Turquette , Tomasz Figa , Mark Hambleton , Lorenzo Pieralisi , Russell King , Nicolas Pitre , Daniel Lezcano , linux-arm-kernel@lists.infradead.org, Grant Likely , Dave Martin , Charles Garcia Tobin , Kevin Hilman , linux-pm@vger.kernel.org, Kumar Gala , Rob Herring , Vincent Guittot , Antti Miettinen , Peter De Schrijver , Stephen Boyd , Amit Kucheria , Mark Brown , Santosh Shilimkar , Hanjun Guo , Sudeep Holla X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,KHOP_BIG_TO_CC, RCVD_IN_DNSWL_MED,RP_MATCHES_RCVD,UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP OS layers built on top of PSCI to enter low-power states require the power_state parameter to be passed to the PSCI CPU suspend method. This parameter is specific to a power state and platform specific, therefore must be provided by firmware to the OS in order to enable proper call sequence. This patch adds a property in the PSCI bindings that describes how the CPU suspend power_state parameter should be defined in DT in all device nodes that rely on PSCI CPU suspend method usage. Signed-off-by: Lorenzo Pieralisi --- Documentation/devicetree/bindings/arm/psci.txt | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/Documentation/devicetree/bindings/arm/psci.txt b/Documentation/devicetree/bindings/arm/psci.txt index 433afe9..6fc32a5 100644 --- a/Documentation/devicetree/bindings/arm/psci.txt +++ b/Documentation/devicetree/bindings/arm/psci.txt @@ -42,6 +42,13 @@ Main node optional properties: - migrate : Function ID for MIGRATE operation +Device tree nodes that require usage of PSCI CPU_SUSPEND function (ie idle +states bindings) must specify the following properties: + +- power-state + Value type: + Definition: power_state parameter to pass to the PSCI + suspend call. Example: