From patchwork Fri Sep 12 14:00:03 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hanjun Guo X-Patchwork-Id: 4895371 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 B53DDBEEA5 for ; Fri, 12 Sep 2014 14:05:28 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 71B05202E5 for ; Fri, 12 Sep 2014 14:05:27 +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 34960202B8 for ; Fri, 12 Sep 2014 14:05:26 +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 1XSRQq-0001jx-3X; Fri, 12 Sep 2014 14:02:36 +0000 Received: from mail-pd0-f174.google.com ([209.85.192.174]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XSRPn-0000pj-OD for linux-arm-kernel@lists.infradead.org; Fri, 12 Sep 2014 14:01:32 +0000 Received: by mail-pd0-f174.google.com with SMTP id v10so1286515pde.33 for ; Fri, 12 Sep 2014 07:01:10 -0700 (PDT) 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=mW/bajw19+vE6TzYh7IicvWwCa2GQOieWRLg1XXq7+8=; b=MkUiDkJZ4/DwL2aW1TOl2wM7RUdBcAOHsxkeoruraup/NJUg0z06MtitZ0abXXgdZP 2+AoslzhXoKnfLO0d1TQyj5S5jLRLwQShaEkrMnVD0FLOSjaUhX8EN5VC1ZOFpM3mR0c B/M216jxZ6PJJWIMoj8RNwLTXTCziDGydP01EIvmal+SRPDzyHoLW1OXYt7M57PPZ19v 5Sz372GTBw6ouuL0IKKZYEaZeGZ7JuJZLahbj2KTjrY8ghO9uOUERP/sOCTf4nslS74q FCX3A87dIFHweoQWtpD+dlGXxpxY9lLougJB+q9boqkSSA3iCYBkfUvuM53/iBidDL/R YE3Q== X-Gm-Message-State: ALoCoQndwCNaMlorQPV3yZFqMVxMYP6RXH7d6NwD1zxjTRbb3iZZvzYhdx2/mvBsHyzgKGiYstZj X-Received: by 10.70.129.204 with SMTP id ny12mr13910702pdb.114.1410530470352; Fri, 12 Sep 2014 07:01:10 -0700 (PDT) Received: from localhost ([111.140.73.43]) by mx.google.com with ESMTPSA id xq4sm4203690pac.21.2014.09.12.07.01.09 for (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Fri, 12 Sep 2014 07:01:09 -0700 (PDT) From: Hanjun Guo To: Catalin Marinas , "Rafael J. Wysocki" , Mark Rutland , Olof Johansson , Grant Likely , Will Deacon Subject: [PATCH v4 05/18] ARM64 / ACPI: Introduce sleep-arm.c Date: Fri, 12 Sep 2014 22:00:03 +0800 Message-Id: <1410530416-30200-6-git-send-email-hanjun.guo@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1410530416-30200-1-git-send-email-hanjun.guo@linaro.org> References: <1410530416-30200-1-git-send-email-hanjun.guo@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140912_070132_126262_FEA1131F X-CRM114-Status: GOOD ( 12.49 ) X-Spam-Score: -2.5 (--) Cc: linaro-acpi@lists.linaro.org, Liviu Dudau , Lv Zheng , Rob Herring , Lorenzo Pieralisi , Daniel Lezcano , Robert Moore , linux-acpi@vger.kernel.org, Charles.Garcia-Tobin@arm.com, Robert Richter , Jason Cooper , Arnd Bergmann , Marc Zyngier , Jon Masters , Tomasz Nowicki , Mark Brown , Bjorn Helgaas , linux-arm-kernel@lists.infradead.org, Graeme Gregory , Randy Dunlap , linux-kernel@vger.kernel.org, Hanjun Guo , 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=-4.1 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE, 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. 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 505d4d7..89837f8 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; +}