From patchwork Wed Jun 24 10:32:46 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Daniel Baluta (OSS)" X-Patchwork-Id: 11622799 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id CA1EB138C for ; Wed, 24 Jun 2020 10:35:12 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5A9D52088E for ; Wed, 24 Jun 2020 10:35:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alsa-project.org header.i=@alsa-project.org header.b="UZWaVyVX"; dkim=pass (1024-bit key) header.d=NXP1.onmicrosoft.com header.i=@NXP1.onmicrosoft.com header.b="gcJniOqq" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5A9D52088E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=oss.nxp.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=alsa-devel-bounces@alsa-project.org Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id B862A1854; Wed, 24 Jun 2020 12:34:23 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz B862A1854 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1592994910; bh=IC5F9ZhpBLO/RK17SS7EVw1C1Nq9gL/hOS7UoJ3r9JY=; h=From:To:Subject:Date:In-Reply-To:References:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=UZWaVyVXKpA0oSu2HyCwPm7tJ4xRMSlm7+1Rt4iTOSb4HvVR9/6kVj2YUZho5IaKm D+GHqu3wAJwbS+pB3mbijITyX5d30ubZkI77Z7s4b3KPGXWKJ7he++w8jgxWvDiFRX gXYndL4yyD392YiSeX/5cchR/s7CRBGaH1uzYw7k= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id C66E8F80268; Wed, 24 Jun 2020 12:33:31 +0200 (CEST) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa1.perex.cz (Postfix, from userid 50401) id 6213FF80162; Wed, 24 Jun 2020 12:33:28 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on alsa1.perex.cz X-Spam-Level: X-Spam-Status: No, score=-0.0 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, MSGID_FROM_MTA_HEADER,RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_PASS,URIBL_BLOCKED autolearn=disabled version=3.4.0 Received: from EUR03-VE1-obe.outbound.protection.outlook.com (mail-eopbgr50074.outbound.protection.outlook.com [40.107.5.74]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 62627F8012F for ; Wed, 24 Jun 2020 12:33:22 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 62627F8012F Authentication-Results: alsa1.perex.cz; dkim=pass (1024-bit key) header.d=NXP1.onmicrosoft.com header.i=@NXP1.onmicrosoft.com header.b="gcJniOqq" ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=e/NYUBKxBJRSFdGXUsWIucmX1jLk1lmYy8uI/xV1dgqRmqyABRZ4d19OOyEOd62PsmGsS00EV3Mp0Lu44OX5v+hbzXlWJQvaPskRzTICDPBkmXFYQ8sw6a8fq/8AqqSgdRDlQ5Xlp44sIB1wZOQ9aRuHotTjW8QLx0HWH/G07/Hcd+xcZ7HbHBSdwwHKw09gVoxY+a5Bnj9uW/EQt2oCz14wecWh/afPgtbeaFAjOFIGHZIAc3x7tAx7k4PlbpOmJyYGCjseD3DkOoCkTnLma+Exv5lcooEc4eMrJjF0KUW7zm4hbRYoLE3Xiwdpc8MKNeUDgIhVgYxSaVgGCX2y7A== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=s/gLNWHJBFdPe+yK6SdEdcGlZQH9DOx59u4muZL5sGg=; b=dX8+2MAyw7U7s8zRp4njQYhvL7zmkLRPs0VjZhPaS+8AUwwV9AHQ7Z/8DG9qD2DUlUYJu2xFxbkxPfv+06e4ARbGqq7daJtaHarZFCP1zWxhE54RpeiLJTzNwnprSryCXDe1igchsWMhf0GP9+kmRJyLXJhlmHlxNO2SBB1HbJhPKv+BVa18krD4NLPMCdjjqE7B/27vdJCYwEiEj3UAXwIH1+Iyr1ATW9eQldFvoVSxkCgUWaSxTJxUQQlx+HBFCotm//z/40Cv+Uj/z5fZWysCn7ZkQl6MhbsKrrxqEdv+mk60mtQsM24bx8pXCp3Df1ZXqcsX9A9dqw8EMxhqng== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=oss.nxp.com; dmarc=pass action=none header.from=oss.nxp.com; dkim=pass header.d=oss.nxp.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=NXP1.onmicrosoft.com; s=selector2-NXP1-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=s/gLNWHJBFdPe+yK6SdEdcGlZQH9DOx59u4muZL5sGg=; b=gcJniOqq11ZYv5Qz9UtZtyrmmI8JPhukxcfp3CyhvAJbxHdyZd188pulw3elVcHfVpuJgyraXMTPDlubJFHGJVnMDbO3PmSLhiflUFPTc9T0wpytMoVeiN9KkCJT4tKZ4ibUNLRfkVIEr0CbWG23y8idj3qzhQM5TsdImgqsegg= Authentication-Results: kernel.org; dkim=none (message not signed) header.d=none;kernel.org; dmarc=none action=none header.from=oss.nxp.com; Received: from VI1PR0401MB2287.eurprd04.prod.outlook.com (2603:10a6:800:2e::19) by VI1PR0401MB2445.eurprd04.prod.outlook.com (2603:10a6:800:55::12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3131.20; Wed, 24 Jun 2020 10:33:17 +0000 Received: from VI1PR0401MB2287.eurprd04.prod.outlook.com ([fe80::9d5c:685e:4b51:fa60]) by VI1PR0401MB2287.eurprd04.prod.outlook.com ([fe80::9d5c:685e:4b51:fa60%3]) with mapi id 15.20.3109.027; Wed, 24 Jun 2020 10:33:17 +0000 From: Daniel Baluta To: khilman@kernel.org, ulf.hansson@linaro.org, linux-pm@vger.kernel.org, rjw@rjwysocki.net Subject: [PATCH v3 1/2] PM / domains: Introduce multi PM domains helpers Date: Wed, 24 Jun 2020 13:32:46 +0300 Message-Id: <20200624103247.7115-2-daniel.baluta@oss.nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200624103247.7115-1-daniel.baluta@oss.nxp.com> References: <20200624103247.7115-1-daniel.baluta@oss.nxp.com> X-ClientProxiedBy: AM0PR01CA0100.eurprd01.prod.exchangelabs.com (2603:10a6:208:10e::41) To VI1PR0401MB2287.eurprd04.prod.outlook.com (2603:10a6:800:2e::19) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from fsr-ub1864-103.ro-buh02.nxp.com (83.217.231.2) by AM0PR01CA0100.eurprd01.prod.exchangelabs.com (2603:10a6:208:10e::41) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3109.22 via Frontend Transport; Wed, 24 Jun 2020 10:33:16 +0000 X-Mailer: git-send-email 2.17.1 X-Originating-IP: [83.217.231.2] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-HT: Tenant X-MS-Office365-Filtering-Correlation-Id: cbd7c576-94c3-436f-b529-08d8182a01d8 X-MS-TrafficTypeDiagnostic: VI1PR0401MB2445: X-MS-Exchange-SharedMailbox-RoutingAgent-Processed: True X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:6790; X-Forefront-PRVS: 0444EB1997 X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: KIURNGWJ+NaTOuMUQjp8oJ09bP1L5OYWRb3G3S2+y6ujOmgqN97npcnCuI6GRsboZKukhAZY2wrkFYaSCAfDa+9tqoDBwau+nH6ILq7U2osFzGrAgslNZOVMVefEyJ8QF3RYsCFLeO742Sx8aqFy3j+No9kvEt+Vg7j8jibN0wo1bc7GpLgy7L2NfcC0nnaEJDK9IdpAP5dNTVPyeTtCjHkojM+21wtgbdQFDoMggO26FVCaXCLQK/TZT07m0BkWpXvdapoCz9YuxKzbE7jZquRlmJqATKjvv+7e3DtFUqQURk4lLXe5U7Za7gtLeDsUmF9hJy4hv7vNygFh84wOEw== X-Forefront-Antispam-Report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:VI1PR0401MB2287.eurprd04.prod.outlook.com; PTR:; CAT:NONE; SFTY:; SFS:(4636009)(136003)(346002)(376002)(366004)(39860400002)(396003)(86362001)(8676002)(186003)(16526019)(1076003)(8936002)(6512007)(66946007)(2616005)(83380400001)(66556008)(5660300002)(66476007)(316002)(956004)(26005)(6486002)(44832011)(4326008)(6506007)(2906002)(52116002)(478600001)(6666004); DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData: /thEo6/d96Gx9bStZpBOcWxhm2Tae3uEMKRX54IsuW8zgFKMFfDlKBu1zI9YBAX/nyrDua8ieeDr8JEcI90nzRyoxU6cKn50J18OMNNQvXpnA0Auri4KhC95aeuj17T9R8T1GYaQdqJ8UTHL0DUQ8/j8j7ia6qB/jH+9PLamv3fOl2JdMGJHK/KhqcDxD5X5y7uKj4Uc1l9IxRfLwbaIstsICYvdbG6ZCAgS3zHwRSNF/QOtjfaUV8rH8RnpDbh6d1dYLF3qi/jJbtV+1ihQqNgkBSSWuTQu1DERYRSpuO2waMsi5rlozaGVyUgfffjUmjAG0l6r/B2iG56py4nJwGbx/VFcg0YGqApUElYGMnzf66K4pdOWuewBUxKD7+WPbEMW7u5Hgo72VV3WecXbix5fIppc+rW3VcFNT+KGMO0n950MXDB7dqzjsLSBAclN6PuM2maYhncFa4fbROHa3/fMG5gs6mkXFIha04YbFpc= X-OriginatorOrg: oss.nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: cbd7c576-94c3-436f-b529-08d8182a01d8 X-MS-Exchange-CrossTenant-AuthSource: VI1PR0401MB2287.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Jun 2020 10:33:17.4406 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: m+yZ8tBeNp+Or2QguurcRoMMre+79IZwJH+mTjb7n1/y+5hwQWpJ42lZ88RN64QKbo0pJr6cNbx6Rgr57YxtmQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR0401MB2445 Cc: alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org, kernel@pengutronix.de, linux-imx@nxp.com X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" From: Daniel Baluta This patch introduces helpers support for multi PM domains. API consists of: 1) dev_multi_pm_attach - powers up all PM domains associated with a given device. Because we can attach one PM domain per device, we create virtual devices (children of initial device) and associate PM domains one per virtual device. 2) dev_multi_pm_detach - detaches all virtual devices from PM domains attached with. Signed-off-by: Daniel Baluta --- drivers/base/power/common.c | 93 +++++++++++++++++++++++++++++++++++++ include/linux/pm_domain.h | 19 ++++++++ 2 files changed, 112 insertions(+) diff --git a/drivers/base/power/common.c b/drivers/base/power/common.c index bbddb267c2e6..b0a4d0109810 100644 --- a/drivers/base/power/common.c +++ b/drivers/base/power/common.c @@ -228,3 +228,96 @@ void dev_pm_domain_set(struct device *dev, struct dev_pm_domain *pd) device_pm_check_callbacks(dev); } EXPORT_SYMBOL_GPL(dev_pm_domain_set); + +/** + * dev_multi_pm_attach - power up device associated power domains + * @dev: The device used to lookup the PM domains + * + * Parse device's OF node to find all PM domains specifiers. For each power + * domain found, create a virtual device and associate it with the + * current power domain. + * + * This function should typically be invoked by a driver during the + * probe phase, in the case its device requires power management through + * multiple PM domains. + * + * Returns a pointer to @dev_multi_pm_domain_data if successfully attached PM + * domains, NULL when the device doesn't need a PM domain or when single + * power-domains exists for it, else an ERR_PTR() in case of + * failures. + */ +struct dev_multi_pm_domain_data *dev_multi_pm_attach(struct device *dev) +{ + struct dev_multi_pm_domain_data *mpd, *retp; + int num_domains; + int i; + + num_domains = of_count_phandle_with_args(dev->of_node, "power-domains", + "#power-domain-cells"); + if (num_domains < 2) + return NULL; + + mpd = devm_kzalloc(dev, sizeof(*mpd), GFP_KERNEL); + if (!mpd) + return ERR_PTR(-ENOMEM); + + mpd->dev = dev; + mpd->num_domains = num_domains; + + mpd->virt_devs = devm_kmalloc_array(dev, mpd->num_domains, + sizeof(*mpd->virt_devs), + GFP_KERNEL); + if (!mpd->virt_devs) + return ERR_PTR(-ENOMEM); + + mpd->links = devm_kmalloc_array(dev, mpd->num_domains, + sizeof(*mpd->links), GFP_KERNEL); + if (!mpd->links) + return ERR_PTR(-ENOMEM); + + for (i = 0; i < mpd->num_domains; i++) { + mpd->virt_devs[i] = dev_pm_domain_attach_by_id(dev, i); + if (IS_ERR(mpd->virt_devs[i])) { + retp = (struct dev_multi_pm_domain_data *) + mpd->virt_devs[i]; + goto exit_unroll_pm; + } + mpd->links[i] = device_link_add(dev, mpd->virt_devs[i], + DL_FLAG_STATELESS | + DL_FLAG_PM_RUNTIME | + DL_FLAG_RPM_ACTIVE); + if (!mpd->links[i]) { + retp = ERR_PTR(-ENOMEM); + dev_pm_domain_detach(mpd->virt_devs[i], false); + goto exit_unroll_pm; + } + } + return mpd; + +exit_unroll_pm: + while (--i >= 0) { + device_link_del(mpd->links[i]); + dev_pm_domain_detach(mpd->virt_devs[i], false); + } + + return retp; +} +EXPORT_SYMBOL(dev_multi_pm_attach); + +/** + * dev_multi_pm_detach - Detach a device from its PM domains. + * Each multi power domain is attached to a virtual children device + * + * @mpd: multi power domains data, contains the association between + * virtul device and PM domain + */ +void dev_multi_pm_detach(struct dev_multi_pm_domain_data *mpd) +{ + int i; + + for (i = 0; i < mpd->num_domains; i++) { + device_link_del(mpd->links[i]); + dev_pm_domain_detach(mpd->virt_devs[i], false); + } +} +EXPORT_SYMBOL(dev_multi_pm_detach); diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h index 9ec78ee53652..af1107731044 100644 --- a/include/linux/pm_domain.h +++ b/include/linux/pm_domain.h @@ -183,6 +183,13 @@ struct generic_pm_domain_data { void *data; }; +struct dev_multi_pm_domain_data { + struct device *dev; /* parent device */ + struct device **virt_devs; /* virtual children links */ + struct device_link **links; /* links parent <-> virtual children */ + int num_domains; +}; + #ifdef CONFIG_PM_GENERIC_DOMAINS static inline struct generic_pm_domain_data *to_gpd_data(struct pm_domain_data *pdd) { @@ -369,18 +376,27 @@ struct generic_pm_domain *of_genpd_remove_last(struct device_node *np) #ifdef CONFIG_PM int dev_pm_domain_attach(struct device *dev, bool power_on); +struct dev_multi_pm_domain_data *dev_multi_pm_attach(struct device *dev); struct device *dev_pm_domain_attach_by_id(struct device *dev, unsigned int index); struct device *dev_pm_domain_attach_by_name(struct device *dev, const char *name); void dev_pm_domain_detach(struct device *dev, bool power_off); int dev_pm_domain_start(struct device *dev); +void dev_multi_pm_detach(struct dev_multi_pm_domain_data *mpd); void dev_pm_domain_set(struct device *dev, struct dev_pm_domain *pd); + #else static inline int dev_pm_domain_attach(struct device *dev, bool power_on) { return 0; } + +static inline struct dev_multi_pm_domain_data *dev_multi_pm_attach(struct device *dev) +{ + return NULL; +} + static inline struct device *dev_pm_domain_attach_by_id(struct device *dev, unsigned int index) { @@ -396,6 +412,9 @@ static inline int dev_pm_domain_start(struct device *dev) { return 0; } + +static inline void dev_multi_pm_detach(struct dev_multi_pm_domain_data *mpd) {} + static inline void dev_pm_domain_set(struct device *dev, struct dev_pm_domain *pd) {} #endif