From patchwork Mon Feb 2 12:45:33 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hanjun Guo X-Patchwork-Id: 5761261 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 [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id D0A1BBF440 for ; Mon, 2 Feb 2015 12:51:15 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id DB47120328 for ; Mon, 2 Feb 2015 12:51:14 +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 E07EB202E6 for ; Mon, 2 Feb 2015 12:51:13 +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 1YIGRJ-00007B-4i; Mon, 02 Feb 2015 12:49:17 +0000 Received: from mail-pa0-f47.google.com ([209.85.220.47]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YIGR5-00087F-Rm for linux-arm-kernel@lists.infradead.org; Mon, 02 Feb 2015 12:49:04 +0000 Received: by mail-pa0-f47.google.com with SMTP id lj1so81974942pab.6 for ; Mon, 02 Feb 2015 04:48:43 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=BBsAp+dD4SdQruOUE8sVLKrnTPmIT9uzL2NPOgCkNgM=; b=N6fZBfZOSnFJVF5nRxhayhbkBjWxKqpCLFLaMNCDfE9FPtivXfihUGBWqJ2fYDMtxE AUEjN1jRq4ip/5LoSZr9NrtYQxb2wiWGv6BbxJyuLs3Ndhs2Z0sLQTJz9cg3agHW+w+U Ne7tksYtpaPSGHS8ZOelahSQFzxjq0GFT/euks3zpMHro4vvfBRx8yEK9Wt7xKM+r4F4 lPsgXL5SXs025TBjF7R4IxOAzeO2nZJ6dlgJZ8Ig3AFa7JYFkxjIfP260tIN+8FHy0YY VmAXV8HMMbleuAaSmkDqK+YV8m+TktrFgdOf+SN4UkR/ZvFrzGti/tcY9xQRqdIC5RyD l9+Q== X-Gm-Message-State: ALoCoQmGhKIo1kJ/TH+qEAALSOAv76oNxqUnzw8U9s+K9aUtjIQ4nQ4PVEDIA8VDibw7eyr0PxwY X-Received: by 10.66.102.41 with SMTP id fl9mr28839102pab.7.1422881323251; Mon, 02 Feb 2015 04:48:43 -0800 (PST) Received: from localhost ([180.150.157.4]) by mx.google.com with ESMTPSA id gj9sm18756777pbc.32.2015.02.02.04.48.41 (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Mon, 02 Feb 2015 04:48:42 -0800 (PST) From: Hanjun Guo To: Catalin Marinas , "Rafael J. Wysocki" , Olof Johansson , Arnd Bergmann , Mark Rutland , Grant Likely , Will Deacon Subject: [PATCH v8 05/21] ACPI / sleep: Introduce sleep_arm.c Date: Mon, 2 Feb 2015 20:45:33 +0800 Message-Id: <1422881149-8177-6-git-send-email-hanjun.guo@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1422881149-8177-1-git-send-email-hanjun.guo@linaro.org> References: <1422881149-8177-1-git-send-email-hanjun.guo@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150202_044903_930067_AA1D490E X-CRM114-Status: GOOD ( 12.35 ) X-Spam-Score: -0.7 (/) Cc: Mark Langsdorf , linaro-acpi@lists.linaro.org, wangyijing@huawei.com, Rob Herring , Lorenzo Pieralisi , Timur Tabi , Daniel Lezcano , linux-acpi@vger.kernel.org, Charles.Garcia-Tobin@arm.com, phoenix.liyi@huawei.com, Robert Richter , Jason Cooper , Marc Zyngier , Jon Masters , Tomasz Nowicki , Mark Brown , Bjorn Helgaas , linux-arm-kernel@lists.infradead.org, Ashwin Chaugule , Graeme Gregory , Randy Dunlap , linux-kernel@vger.kernel.org, Hanjun Guo , suravee.suthikulpanit@amd.com, Sudeep Holla 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=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, 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 From: Graeme Gregory ACPI 5.1 does not currently support S states for ARM64 hardware but ACPI code will call acpi_target_system_state() for device power managment, so introduce sleep_arm.c to allow other drivers to function until S states are defined. CC: Rafael J. Wysocki Tested-by: Suravee Suthikulpanit Tested-by: Yijing Wang Tested-by: Mark Langsdorf Tested-by: Jon Masters Tested-by: Timur Tabi Signed-off-by: Graeme Gregory Signed-off-by: Tomasz Nowicki Signed-off-by: Hanjun Guo --- drivers/acpi/Makefile | 4 ++++ drivers/acpi/sleep_arm.c | 28 ++++++++++++++++++++++++++++ 2 files changed, 32 insertions(+) create mode 100644 drivers/acpi/sleep_arm.c diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile index f74317c..bcec54e 100644 --- a/drivers/acpi/Makefile +++ b/drivers/acpi/Makefile @@ -23,7 +23,11 @@ acpi-y += nvs.o # Power management related files acpi-y += wakeup.o +ifeq ($(ARCH), arm64) +acpi-y += sleep_arm.o +else # X86, IA64 acpi-y += sleep.o +endif acpi-y += device_pm.o acpi-$(CONFIG_ACPI_SLEEP) += proc.o diff --git a/drivers/acpi/sleep_arm.c b/drivers/acpi/sleep_arm.c new file mode 100644 index 0000000..54578ef --- /dev/null +++ b/drivers/acpi/sleep_arm.c @@ -0,0 +1,28 @@ +/* + * ARM64 Specific Sleep Functionality + * + * Copyright (C) 2013-2014, Linaro Ltd. + * Author: Graeme Gregory + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include + +/* + * Currently the ACPI 5.1 standard does not define S states in a + * manner which is usable for ARM64. These two stubs are sufficient + * that system initialises and device PM works. + */ +u32 acpi_target_system_state(void) +{ + return ACPI_STATE_S0; +} +EXPORT_SYMBOL_GPL(acpi_target_system_state); + +int __init acpi_sleep_init(void) +{ + return -ENOSYS; +}