From patchwork Thu Jan 10 17:58:44 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lubomir Rintel X-Patchwork-Id: 10756523 X-Patchwork-Delegate: dvhart@infradead.org Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9181B1399 for ; Thu, 10 Jan 2019 17:59:49 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 833DC29B65 for ; Thu, 10 Jan 2019 17:59:49 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 77E7129B72; Thu, 10 Jan 2019 17:59:49 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2CFEB29B65 for ; Thu, 10 Jan 2019 17:59:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730845AbfAJR70 (ORCPT ); Thu, 10 Jan 2019 12:59:26 -0500 Received: from shell.v3.sk ([90.176.6.54]:58597 "EHLO shell.v3.sk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730834AbfAJR7X (ORCPT ); Thu, 10 Jan 2019 12:59:23 -0500 Received: from localhost (localhost [127.0.0.1]) by zimbra.v3.sk (Postfix) with ESMTP id 24C9F10019B; Thu, 10 Jan 2019 18:59:20 +0100 (CET) Received: from shell.v3.sk ([127.0.0.1]) by localhost (zimbra.v3.sk [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id jxN_GLfwRKYP; Thu, 10 Jan 2019 18:59:08 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by zimbra.v3.sk (Postfix) with ESMTP id 0C069100307; Thu, 10 Jan 2019 18:59:01 +0100 (CET) X-Virus-Scanned: amavisd-new at zimbra.v3.sk Received: from shell.v3.sk ([127.0.0.1]) by localhost (zimbra.v3.sk [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id QikxwaQK9201; Thu, 10 Jan 2019 18:58:58 +0100 (CET) Received: from belphegor.brq.redhat.com (nat-pool-brq-t.redhat.com [213.175.37.10]) by zimbra.v3.sk (Postfix) with ESMTPSA id 9FA261002FC; Thu, 10 Jan 2019 18:58:55 +0100 (CET) From: Lubomir Rintel To: Andy Shevchenko , Darren Hart Cc: Rob Herring , Russell King , Mark Rutland , platform-driver-x86@vger.kernel.org, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Lubomir Rintel Subject: [PATCH v5 09/10] ARM: export arm_pm_restart Date: Thu, 10 Jan 2019 18:58:44 +0100 Message-Id: <20190110175845.1203986-10-lkundrak@v3.sk> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190110175845.1203986-1-lkundrak@v3.sk> References: <20190110175845.1203986-1-lkundrak@v3.sk> MIME-Version: 1.0 Sender: platform-driver-x86-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: platform-driver-x86@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The OLPC XO 1.75 laptop is rebooted with a command to the Embedded Controller. The EC driver should be a module, since most people don't need it to be compiled in. The EC driver can't use register_restart_handler() because handlers registered with it are executed in atomic context and the XO 1.75 reboot dance needs to block: the reboot is initiated by poking a GPIO ofter which we need to wait for the EC to initiate a SPI transfer and finish it. Signed-off-by: Lubomir Rintel --- Changes since v4: - Clarify why we need this arch/arm/kernel/reboot.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/kernel/reboot.c b/arch/arm/kernel/reboot.c index 3b2aa9a9fe26..71016cf19b86 100644 --- a/arch/arm/kernel/reboot.c +++ b/arch/arm/kernel/reboot.c @@ -22,6 +22,7 @@ typedef void (*phys_reset_t)(unsigned long, bool); * Function pointers to optional machine specific functions */ void (*arm_pm_restart)(enum reboot_mode reboot_mode, const char *cmd); +EXPORT_SYMBOL_GPL(arm_pm_restart); void (*pm_power_off)(void); EXPORT_SYMBOL(pm_power_off);