From patchwork Fri May 17 03:39:44 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ran Wang X-Patchwork-Id: 1100830 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 454vG14NVgz9sB3 for ; Fri, 17 May 2019 13:40:57 +1000 (AEST) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=nxp.com Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 454vG13HgZzDqQn for ; Fri, 17 May 2019 13:40:57 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=nxp.com (client-ip=92.121.34.13; helo=inva020.nxp.com; envelope-from=ran.wang_1@nxp.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=nxp.com Received: from inva020.nxp.com (inva020.nxp.com [92.121.34.13]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 454vBs2Fc8zDqN7 for ; Fri, 17 May 2019 13:38:11 +1000 (AEST) Received: from inva020.nxp.com (localhost [127.0.0.1]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id F2B0D1A01B9; Fri, 17 May 2019 05:38:07 +0200 (CEST) Received: from invc005.ap-rdc01.nxp.com (invc005.ap-rdc01.nxp.com [165.114.16.14]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 129541A0110; Fri, 17 May 2019 05:38:02 +0200 (CEST) Received: from localhost.localdomain (mega.ap.freescale.net [10.192.208.232]) by invc005.ap-rdc01.nxp.com (Postfix) with ESMTP id CC19E402AE; Fri, 17 May 2019 11:37:54 +0800 (SGT) From: Ran Wang To: Li Yang , Rob Herring , Mark Rutland Subject: [PATCH V2 1/3] PM: wakeup: Add routine to help fetch wakeup source object. Date: Fri, 17 May 2019 11:39:44 +0800 Message-Id: <20190517033946.30763-1-ran.wang_1@nxp.com> X-Mailer: git-send-email 2.17.1 X-Virus-Scanned: ClamAV using ClamSMTP X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Len Brown , devicetree@vger.kernel.org, Greg Kroah-Hartman , linux-pm@vger.kernel.org, "Rafael J . Wysocki" , linux-kernel@vger.kernel.org, Pavel Machek , Ran Wang , linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Some user might want to go through all registered wakeup sources and doing things accordingly. For example, SoC PM driver might need to do HW programming to prevent powering down specific IP which wakeup source depending on. And is user's responsibility to identify if this wakeup source he is interested in. Signed-off-by: Ran Wang --- Change in v2: - None. drivers/base/power/wakeup.c | 18 ++++++++++++++++++ include/linux/pm_wakeup.h | 3 +++ 2 files changed, 21 insertions(+), 0 deletions(-) diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c index 5b2b6a0..6904485 100644 --- a/drivers/base/power/wakeup.c +++ b/drivers/base/power/wakeup.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include @@ -226,6 +227,22 @@ void wakeup_source_unregister(struct wakeup_source *ws) } } EXPORT_SYMBOL_GPL(wakeup_source_unregister); +/** + * wakeup_source_get_next - Get next wakeup source from the list + * @ws: Previous wakeup source object, null means caller want first one. + */ +struct wakeup_source *wakeup_source_get_next(struct wakeup_source *ws) +{ + struct list_head *ws_head = &wakeup_sources; + + if (ws) + return list_next_or_null_rcu(ws_head, &ws->entry, + struct wakeup_source, entry); + else + return list_entry_rcu(ws_head->next, + struct wakeup_source, entry); +} +EXPORT_SYMBOL_GPL(wakeup_source_get_next); /** * device_wakeup_attach - Attach a wakeup source object to a device object. @@ -242,6 +259,7 @@ static int device_wakeup_attach(struct device *dev, struct wakeup_source *ws) return -EEXIST; } dev->power.wakeup = ws; + ws->attached_dev = dev; if (dev->power.wakeirq) device_wakeup_attach_irq(dev, dev->power.wakeirq); spin_unlock_irq(&dev->power.lock); diff --git a/include/linux/pm_wakeup.h b/include/linux/pm_wakeup.h index 0ff134d..3d300f5 100644 --- a/include/linux/pm_wakeup.h +++ b/include/linux/pm_wakeup.h @@ -50,6 +50,7 @@ * @wakeup_count: Number of times the wakeup source might abort suspend. * @active: Status of the wakeup source. * @has_timeout: The wakeup source has been activated with a timeout. + * @attached_dev: The device it attached to */ struct wakeup_source { const char *name; @@ -70,6 +71,7 @@ struct wakeup_source { unsigned long wakeup_count; bool active:1; bool autosleep_enabled:1; + struct device *attached_dev; }; #ifdef CONFIG_PM_SLEEP @@ -101,6 +103,7 @@ static inline void device_set_wakeup_path(struct device *dev) extern void wakeup_source_remove(struct wakeup_source *ws); extern struct wakeup_source *wakeup_source_register(const char *name); extern void wakeup_source_unregister(struct wakeup_source *ws); +extern struct wakeup_source *wakeup_source_get_next(struct wakeup_source *ws); extern int device_wakeup_enable(struct device *dev); extern int device_wakeup_disable(struct device *dev); extern void device_set_wakeup_capable(struct device *dev, bool capable);