From patchwork Thu Oct 16 13:59:55 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lorenzo Pieralisi X-Patchwork-Id: 5092151 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 B51AFC11AD for ; Thu, 16 Oct 2014 14:02:57 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 57F79200E9 for ; Thu, 16 Oct 2014 14:02:56 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (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 72E95201CD for ; Thu, 16 Oct 2014 14:02:55 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Xelap-0001ID-G2; Thu, 16 Oct 2014 13:59:51 +0000 Received: from service87.mimecast.com ([91.220.42.44]) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Xelam-0000uL-Cr for linux-arm-kernel@lists.infradead.org; Thu, 16 Oct 2014 13:59:49 +0000 Received: from cam-owa2.Emea.Arm.com (fw-tnat.cambridge.arm.com [217.140.96.21]) by service87.mimecast.com; Thu, 16 Oct 2014 14:59:19 +0100 Received: from red-moon.cambridge.arm.com ([10.1.255.212]) by cam-owa2.Emea.Arm.com with Microsoft SMTPSVC(6.0.3790.3959); Thu, 16 Oct 2014 14:59:18 +0100 From: Lorenzo Pieralisi To: linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org Subject: [PATCH 1/3] drivers: cpuidle: add status property to ARM idle states Date: Thu, 16 Oct 2014 14:59:55 +0100 Message-Id: <1413467997-32131-1-git-send-email-lorenzo.pieralisi@arm.com> X-Mailer: git-send-email 2.1.2 X-OriginalArrivalTime: 16 Oct 2014 13:59:18.0742 (UTC) FILETIME=[6110F760:01CFE949] X-MC-Unique: 114101614591922701 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20141016_065948_762149_57DB00CF X-CRM114-Status: UNSURE ( 8.09 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -2.3 (--) Cc: Mark Rutland , devicetree@vger.kernel.org, Kevin Hilman , Chander Kashyap , Daniel Lezcano , Stephen Boyd , Rob Herring , Lorenzo Pieralisi X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 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=-1.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable 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 On some platforms the device tree bindings must provide the kernel with a status flag for idle states, that defines whether the idle state is operational or not in the current configuration. This patch adds a status property to the ARM idle states compliant with ePAPR v1.1 and updates the DT parsing code accordingly. Signed-off-by: Lorenzo Pieralisi Acked-by: Kevin Hilman --- Documentation/devicetree/bindings/arm/idle-states.txt | 14 ++++++++++++++ drivers/cpuidle/dt_idle_states.c | 3 +++ 2 files changed, 17 insertions(+) diff --git a/Documentation/devicetree/bindings/arm/idle-states.txt b/Documentation/devicetree/bindings/arm/idle-states.txt index 37375c7..d8ab4b9 100644 --- a/Documentation/devicetree/bindings/arm/idle-states.txt +++ b/Documentation/devicetree/bindings/arm/idle-states.txt @@ -317,6 +317,20 @@ follows: In such systems entry-latency-us + exit-latency-us will exceed wakeup-latency-us by this duration. + - status: + Usage: Optional + Value type: + Definition: A standard device tree property [5] that indicates + the operational status of an idle-state. + If present, it shall be: + "okay": to indicate that the idle state is + operational. + "disabled": to indicate that the idle state has + been disabled in firmware so it is not + operational. + If property is not present the idle-state must be + considered operational. + In addition to the properties listed above, a state node may require additional properties specifics to the entry-method defined in the idle-states node, please refer to the entry-method bindings diff --git a/drivers/cpuidle/dt_idle_states.c b/drivers/cpuidle/dt_idle_states.c index 52f4d11..22840f4 100644 --- a/drivers/cpuidle/dt_idle_states.c +++ b/drivers/cpuidle/dt_idle_states.c @@ -169,6 +169,9 @@ int dt_init_idle_driver(struct cpuidle_driver *drv, if (!state_node) break; + if (!of_device_is_available(state_node)) + continue; + if (!idle_state_valid(state_node, i, cpumask)) { pr_warn("%s idle state not valid, bailing out\n", state_node->full_name);