From patchwork Fri Feb 7 04:35:04 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandre Courbot X-Patchwork-Id: 3599451 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id BBD119F2D6 for ; Fri, 7 Feb 2014 04:39:09 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id CFF8320172 for ; Fri, 7 Feb 2014 04:39:08 +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 E4A5A2012F for ; Fri, 7 Feb 2014 04:39:07 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WBdBg-00009U-QY; Fri, 07 Feb 2014 04:37:13 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1WBdBF-0003bT-Jf; Fri, 07 Feb 2014 04:36:45 +0000 Received: from hqemgate16.nvidia.com ([216.228.121.65]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WBdAf-0003Va-2j for linux-arm-kernel@lists.infradead.org; Fri, 07 Feb 2014 04:36:10 +0000 Received: from hqnvupgp08.nvidia.com (Not Verified[216.228.121.13]) by hqemgate16.nvidia.com id ; Thu, 06 Feb 2014 20:36:36 -0800 Received: from hqemhub01.nvidia.com ([172.20.12.94]) by hqnvupgp08.nvidia.com (PGP Universal service); Thu, 06 Feb 2014 20:34:17 -0800 X-PGP-Universal: processed; by hqnvupgp08.nvidia.com on Thu, 06 Feb 2014 20:34:17 -0800 Received: from percival.nvidia.com (172.20.144.16) by hqemhub01.nvidia.com (172.20.150.30) with Microsoft SMTP Server (TLS) id 8.3.327.1; Thu, 6 Feb 2014 20:35:51 -0800 From: Alexandre Courbot To: Stephen Warren , Thierry Reding , Russell King , Tomasz Figa Subject: [PATCH v2 4/6] ARM: firmware: add prepare_idle() operation Date: Fri, 7 Feb 2014 13:35:04 +0900 Message-ID: <1391747706-1847-5-git-send-email-acourbot@nvidia.com> X-Mailer: git-send-email 1.8.5.3 In-Reply-To: <1391747706-1847-1-git-send-email-acourbot@nvidia.com> References: <1391747706-1847-1-git-send-email-acourbot@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140206_233609_252317_F1B012C8 X-CRM114-Status: GOOD ( 11.97 ) X-Spam-Score: -2.4 (--) Cc: gnurou@gmail.com, linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org, Alexandre Courbot , Olof Johansson , linux-arm-kernel@lists.infradead.org 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.7 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, 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 Some firmwares do not put the CPU into idle mode themselves, but still need to be informed that the CPU is about to enter idle mode before this happens. Add a prepare_idle() operation to the firmware_ops structure to handle such cases. Signed-off-by: Alexandre Courbot --- arch/arm/include/asm/firmware.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/arm/include/asm/firmware.h b/arch/arm/include/asm/firmware.h index 15631300c238..2c9f10df7568 100644 --- a/arch/arm/include/asm/firmware.h +++ b/arch/arm/include/asm/firmware.h @@ -22,6 +22,10 @@ */ struct firmware_ops { /* + * Inform the firmware we intend to enter CPU idle mode + */ + int (*prepare_idle)(void); + /* * Enters CPU idle mode */ int (*do_idle)(void);