From patchwork Mon May 20 09:52:36 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ran Wang X-Patchwork-Id: 10950725 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 91193112C for ; Mon, 20 May 2019 09:51:05 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7F08C28749 for ; Mon, 20 May 2019 09:51:05 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 706892874B; Mon, 20 May 2019 09:51:05 +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 EBA0E28749 for ; Mon, 20 May 2019 09:51:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729675AbfETJvE (ORCPT ); Mon, 20 May 2019 05:51:04 -0400 Received: from inva021.nxp.com ([92.121.34.21]:38282 "EHLO inva021.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730353AbfETJvD (ORCPT ); Mon, 20 May 2019 05:51:03 -0400 Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 483F120028A; Mon, 20 May 2019 11:51:01 +0200 (CEST) Received: from invc005.ap-rdc01.nxp.com (invc005.ap-rdc01.nxp.com [165.114.16.14]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 4968320018B; Mon, 20 May 2019 11:50:55 +0200 (CEST) Received: from localhost.localdomain (mega.ap.freescale.net [10.192.208.232]) by invc005.ap-rdc01.nxp.com (Postfix) with ESMTP id E68B6402A2; Mon, 20 May 2019 17:50:47 +0800 (SGT) From: Ran Wang To: Li Yang , Rob Herring , Mark Rutland , Pavel Machek Cc: "Rafael J . Wysocki" , Len Brown , Greg Kroah-Hartman , linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, Ran Wang Subject: [PATCH v4 1/3] PM: wakeup: Add routine to help fetch wakeup source object. Date: Mon, 20 May 2019 17:52:36 +0800 Message-Id: <20190520095238.29210-1-ran.wang_1@nxp.com> X-Mailer: git-send-email 2.17.1 X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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 v4: - None. Change in v3: - Adjust indentation of *attached_dev;. 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..913b2fb 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);