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 X-Patchwork-Id: 191638 Delivered-To: patch@linaro.org Received: by 2002:a92:1f07:0:0:0:0:0 with SMTP id i7csp453288ile; Wed, 24 Jun 2020 03:33:31 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxnVT3H09w+4j4CsBFt78dF47kBukQivJcNUSTq6VyXrgiQ3mpFyyyCIecwVUW6SKpOp4JR X-Received: by 2002:a17:906:3653:: with SMTP id r19mr23140590ejb.246.1592994811771; Wed, 24 Jun 2020 03:33:31 -0700 (PDT) ARC-Seal: i=2; a=rsa-sha256; t=1592994811; cv=pass; d=google.com; s=arc-20160816; b=vqsNTb+qoob0KgpMwpftTx03o+uuHWkiQimNCkl/05dztw6Hrs8B43roMscksG3UTT Ym89k99WMTD4nKKWilfPLhRf6RZjvpc5jjNEozjEgvXMNamowfxgkbUsnfEwm6qwaLMc QgsDSbZ1Wq+MUi+u36L4MYYnEODdm86/GE4oHb0iL2eebD39kYEbfZwpiYLr46Yuf2m6 2Iosb/CdofQ3m7CWfxZeQ+wWnjZEtiopPtXO98lY+D3h67nESgyN2Zz96MjpS69qZems 9R+CVD6AwLE/ShvVqfTOglMujUNAqQ5ket54R666fIJUojdPhTFRuhqeZs6gmLfFErNC 2xbA== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:dkim-signature; bh=s/gLNWHJBFdPe+yK6SdEdcGlZQH9DOx59u4muZL5sGg=; b=Hpm8epghU2ei0/EVrOYRCpc/bl0ypOe1m26O3s8yZxbAcQXX+rhn+as5mzZPeDj+NS rhUGPWSP1meTXeEmb92lwYKgVqvrpfphn7pGEXZiaqyGHCFNSItCxFsOh2zScWerA9HI L5NGMPGOKoQT1LebkzJD4WkQlRf19hoYMPnM0EMWbmNcmFNXO/aHqyyjXdntkDV7vPj2 DF6SmU1Xl6c76/zuEV6OHRPWjpdKQ09fYQcBHDumfibOK/oPyz8Q0uCdKDpnW+9NVudk vkp7AUez7DP4Q0+jQ6IDnSex7Q79d480o7xnGrAm9jkM6g4pAvWfoWyI0CLggQGLfWN/ bC+A== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@NXP1.onmicrosoft.com header.s=selector2-NXP1-onmicrosoft-com header.b=gcJniOqq; arc=pass (i=1 spf=pass spfdomain=oss.nxp.com dkim=pass dkdomain=oss.nxp.com dmarc=pass fromdomain=oss.nxp.com); spf=pass (google.com: domain of linux-pm-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-pm-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=nxp.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id n6si5900141ejc.328.2020.06.24.03.33.31; Wed, 24 Jun 2020 03:33:31 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-pm-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@NXP1.onmicrosoft.com header.s=selector2-NXP1-onmicrosoft-com header.b=gcJniOqq; arc=pass (i=1 spf=pass spfdomain=oss.nxp.com dkim=pass dkdomain=oss.nxp.com dmarc=pass fromdomain=oss.nxp.com); spf=pass (google.com: domain of linux-pm-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-pm-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=nxp.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388421AbgFXKd0 (ORCPT + 10 others); Wed, 24 Jun 2020 06:33:26 -0400 Received: from mail-eopbgr50074.outbound.protection.outlook.com ([40.107.5.74]:27279 "EHLO EUR03-VE1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S2390430AbgFXKdY (ORCPT ); Wed, 24 Jun 2020 06:33:24 -0400 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 Cc: linux-kernel@vger.kernel.org, kernel@pengutronix.de, alsa-devel@alsa-project.org, linux-imx@nxp.com 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 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org 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(+) -- 2.17.1 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