From patchwork Thu Oct 29 10:59:39 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heikki Krogerus X-Patchwork-Id: 311149 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AA45AC55179 for ; Thu, 29 Oct 2020 10:59:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4232720738 for ; Thu, 29 Oct 2020 10:59:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726954AbgJ2K7s (ORCPT ); Thu, 29 Oct 2020 06:59:48 -0400 Received: from mga01.intel.com ([192.55.52.88]:56275 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725923AbgJ2K7r (ORCPT ); Thu, 29 Oct 2020 06:59:47 -0400 IronPort-SDR: uJ4T/YhWIOH7D9gbSK6jD+8BtOhCJGQOhwUWXF3sLTb8B+7yEjjC8O/buhsXxL7S/v9RTaaZfn cF93vNSDOAuw== X-IronPort-AV: E=McAfee;i="6000,8403,9788"; a="186197276" X-IronPort-AV: E=Sophos;i="5.77,429,1596524400"; d="scan'208";a="186197276" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Oct 2020 03:59:46 -0700 IronPort-SDR: u7hElj58jBAN8rBJkZBYuB4YPieYfvNyYAOVrqjlV8/Akyrw2Vkh1PM7JW5awfmEXvLwn5a6mW 7zsW7LTK1qzA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.77,429,1596524400"; d="scan'208";a="425017594" Received: from black.fi.intel.com (HELO black.fi.intel.com.) ([10.237.72.28]) by fmsmga001.fm.intel.com with ESMTP; 29 Oct 2020 03:59:44 -0700 From: Heikki Krogerus To: "Rafael J. Wysocki" Cc: Felipe Balbi , Andy Shevchenko , Sakari Ailus , linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, linux-acpi@vger.kernel.org Subject: [PATCHv2 1/3] software node: Power management operations for software nodes Date: Thu, 29 Oct 2020 13:59:39 +0300 Message-Id: <20201029105941.63410-2-heikki.krogerus@linux.intel.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201029105941.63410-1-heikki.krogerus@linux.intel.com> References: <20201029105941.63410-1-heikki.krogerus@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org The software node specific PM operations make it possible to handle most PM related quirks separately in their own functions instead of conditionally in the device driver's generic PM functions (and in some cases all over the driver). The software node specific PM operations will also reduce the need to pass platform data in some cases, for example from a core MFD driver to the child device drivers, as from now on the core MFD driver will be able to implement the PM quirks directly for the child devices without the need to touch the drivers of those child devices. If a software node includes the PM operations, those PM operations are always executed separately on top of the other PM operations of the device, so the software node will never replace any of the "normal" PM operations of the device (including the PM domain's operations, class's or bus's PM operations, the device drivers own operations, or any other). Signed-off-by: Heikki Krogerus --- drivers/base/power/common.c | 8 +- drivers/base/swnode.c | 693 +++++++++++++++++++++++++++++++++++- include/linux/property.h | 10 + 3 files changed, 701 insertions(+), 10 deletions(-) diff --git a/drivers/base/power/common.c b/drivers/base/power/common.c index bbddb267c2e69..b64cd4690ac63 100644 --- a/drivers/base/power/common.c +++ b/drivers/base/power/common.c @@ -109,8 +109,14 @@ int dev_pm_domain_attach(struct device *dev, bool power_on) ret = acpi_dev_pm_attach(dev, power_on); if (!ret) ret = genpd_dev_pm_attach(dev); + if (ret < 0) + return ret; - return ret < 0 ? ret : 0; + ret = software_node_dev_pm_attach(dev, power_on); + if (ret) + dev_pm_domain_detach(dev, power_on); + + return ret; } EXPORT_SYMBOL_GPL(dev_pm_domain_attach); diff --git a/drivers/base/swnode.c b/drivers/base/swnode.c index 010828fc785bc..595a9c240fede 100644 --- a/drivers/base/swnode.c +++ b/drivers/base/swnode.c @@ -8,6 +8,8 @@ #include #include +#include +#include #include #include @@ -48,6 +50,19 @@ EXPORT_SYMBOL_GPL(is_software_node); struct swnode, fwnode) : NULL; \ }) +static inline struct swnode *dev_to_swnode(struct device *dev) +{ + struct fwnode_handle *fwnode = dev_fwnode(dev); + + if (!fwnode) + return NULL; + + if (!is_software_node(fwnode)) + fwnode = fwnode->secondary; + + return to_swnode(fwnode); +} + static struct swnode * software_node_to_swnode(const struct software_node *node) { @@ -344,6 +359,673 @@ void property_entries_free(const struct property_entry *properties) } EXPORT_SYMBOL_GPL(property_entries_free); +/* -------------------------------------------------------------------------- */ +/* Power management operations */ + +/* + * The power management operations in software nodes are handled with a power + * management domain - a "wrapper" PM domain: + * + * When PM operations are supplied as part of the software node, the primary + * PM domain of the device is stored and replaced with a device specific + * software node PM domain. The software node PM domain's PM operations, which + * are implemented below, will then always call the matching PM operation of + * the primary PM domain (which was stored) on top of the software node's own + * operation. + * + * If the device does not have primary PM domain, the software node PM wrapper + * operations below will also call the classes, buses and device type's PM + * operations, and of course the device driver's own PM operations if they are + * implemented. The priority of those calls follows drivers/base/power/domain.c: + * + * 1) device type + * 2) class + * 3) bus + * 4) driver + * + * NOTE. The software node PM operation is always called before the primary + * PM domain with resume/on callbacks, and after the primary PM domain with + * suspend/off callbacks. This order is used because the software node PM + * operations are primarily meant to be used to implement quirks, quirks that + * may be needed to power on the device to a point where it is even possible to + * execute the primary PM domain's resume/on routines. + */ + +#ifdef CONFIG_PM +struct swnode_pm_domain { + struct dev_pm_domain pm_domain; + struct dev_pm_domain *primary; +}; + +#define to_swnode_pm_domain(d) \ + container_of(d, struct swnode_pm_domain, pm_domain) + +static int software_node_runtime_suspend(struct device *dev) +{ + struct swnode_pm_domain *domain = to_swnode_pm_domain(dev->pm_domain); + struct swnode *swnode = dev_to_swnode(dev); + int ret; + + if (domain->primary && domain->primary->ops.runtime_suspend) + ret = domain->primary->ops.runtime_suspend(dev); + else if (dev->type && dev->type->pm && dev->type->pm->runtime_suspend) + ret = dev->type->pm->runtime_suspend(dev); + else if (dev->class && dev->class->pm && dev->class->pm->runtime_suspend) + ret = dev->class->pm->runtime_suspend(dev); + else if (dev->bus && dev->bus->pm && dev->bus->pm->runtime_suspend) + ret = dev->bus->pm->runtime_suspend(dev); + else + ret = pm_generic_runtime_suspend(dev); + + if (ret || !swnode->node->pm->runtime_suspend) + return ret; + + return swnode->node->pm->runtime_suspend(dev); +} + +static int software_node_runtime_resume(struct device *dev) +{ + struct swnode_pm_domain *domain = to_swnode_pm_domain(dev->pm_domain); + struct swnode *swnode = dev_to_swnode(dev); + int ret; + + if (swnode->node->pm->runtime_resume) { + ret = swnode->node->pm->runtime_resume(dev); + if (ret) + return ret; + } + + if (domain->primary && domain->primary->ops.runtime_resume) + ret = domain->primary->ops.runtime_resume(dev); + else if (dev->type && dev->type->pm && dev->type->pm->runtime_resume) + ret = dev->type->pm->runtime_resume(dev); + else if (dev->class && dev->class->pm && dev->class->pm->runtime_resume) + ret = dev->class->pm->runtime_resume(dev); + else if (dev->bus && dev->bus->pm && dev->bus->pm->runtime_resume) + ret = dev->bus->pm->runtime_resume(dev); + else + ret = pm_generic_runtime_resume(dev); + + return ret; +} + +static int software_node_runtime_idle(struct device *dev) +{ + struct swnode_pm_domain *domain = to_swnode_pm_domain(dev->pm_domain); + struct swnode *swnode = dev_to_swnode(dev); + int ret = 0; + + if (domain->primary && domain->primary->ops.runtime_idle) + ret = domain->primary->ops.runtime_idle(dev); + else if (dev->type && dev->type->pm && dev->type->pm->runtime_idle) + ret = dev->type->pm->runtime_idle(dev); + else if (dev->class && dev->class->pm && dev->class->pm->runtime_idle) + ret = dev->class->pm->runtime_idle(dev); + else if (dev->bus && dev->bus->pm && dev->bus->pm->runtime_idle) + ret = dev->bus->pm->runtime_idle(dev); + else if (dev->driver && dev->driver->pm && dev->driver->pm->runtime_idle) + ret = dev->driver->pm->runtime_idle(dev); + + if (ret || !swnode->node->pm->runtime_idle) + return ret; + + return swnode->node->pm->runtime_idle(dev); +} + +#ifdef CONFIG_PM_SLEEP +static int software_node_prepare(struct device *dev) +{ + struct swnode_pm_domain *domain = to_swnode_pm_domain(dev->pm_domain); + struct swnode *swnode = dev_to_swnode(dev); + int ret; + + if (domain->primary && domain->primary->ops.prepare) + ret = domain->primary->ops.prepare(dev); + else if (dev->type && dev->type->pm && dev->type->pm->prepare) + ret = dev->type->pm->prepare(dev); + else if (dev->class && dev->class->pm && dev->class->pm->prepare) + ret = dev->class->pm->prepare(dev); + else if (dev->bus && dev->bus->pm && dev->bus->pm->prepare) + ret = dev->bus->pm->prepare(dev); + else + ret = pm_generic_prepare(dev); + + if (ret || !swnode->node->pm->prepare) + return ret; + + return swnode->node->pm->prepare(dev); +} + +static void software_node_complete(struct device *dev) +{ + struct swnode_pm_domain *domain = to_swnode_pm_domain(dev->pm_domain); + struct swnode *swnode = dev_to_swnode(dev); + + if (swnode->node->pm->complete) + swnode->node->pm->complete(dev); + + if (domain->primary && domain->primary->ops.complete) + domain->primary->ops.complete(dev); + else if (dev->type && dev->type->pm && dev->type->pm->complete) + dev->type->pm->complete(dev); + else if (dev->class && dev->class->pm && dev->class->pm->complete) + dev->class->pm->complete(dev); + else if (dev->bus && dev->bus->pm && dev->bus->pm->complete) + dev->bus->pm->complete(dev); + else + pm_generic_complete(dev); +} + +static int software_node_suspend(struct device *dev) +{ + struct swnode_pm_domain *domain = to_swnode_pm_domain(dev->pm_domain); + struct swnode *swnode = dev_to_swnode(dev); + int ret; + + if (domain->primary && domain->primary->ops.suspend) + ret = domain->primary->ops.suspend(dev); + else if (dev->type && dev->type->pm && dev->type->pm->suspend) + ret = dev->type->pm->suspend(dev); + else if (dev->class && dev->class->pm && dev->class->pm->suspend) + ret = dev->class->pm->suspend(dev); + else if (dev->bus && dev->bus->pm && dev->bus->pm->suspend) + ret = dev->bus->pm->suspend(dev); + else + ret = pm_generic_suspend(dev); + + if (ret || !swnode->node->pm->suspend) + return ret; + + return swnode->node->pm->suspend(dev); +} + +static int software_node_resume(struct device *dev) +{ + struct swnode_pm_domain *domain = to_swnode_pm_domain(dev->pm_domain); + struct swnode *swnode = dev_to_swnode(dev); + int ret; + + if (swnode->node->pm->resume) { + ret = swnode->node->pm->resume(dev); + if (ret) + return ret; + } + + if (domain->primary && domain->primary->ops.resume) + ret = domain->primary->ops.resume(dev); + else if (dev->type && dev->type->pm && dev->type->pm->resume) + ret = dev->type->pm->resume(dev); + else if (dev->class && dev->class->pm && dev->class->pm->resume) + ret = dev->class->pm->resume(dev); + else if (dev->bus && dev->bus->pm && dev->bus->pm->resume) + ret = dev->bus->pm->resume(dev); + else + ret = pm_generic_resume(dev); + + return ret; +} + +static int software_node_freeze(struct device *dev) +{ + struct swnode_pm_domain *domain = to_swnode_pm_domain(dev->pm_domain); + struct swnode *swnode = dev_to_swnode(dev); + int ret; + + if (domain->primary && domain->primary->ops.freeze) + ret = domain->primary->ops.freeze(dev); + else if (dev->type && dev->type->pm && dev->type->pm->freeze) + ret = dev->type->pm->freeze(dev); + else if (dev->class && dev->class->pm && dev->class->pm->freeze) + ret = dev->class->pm->freeze(dev); + else if (dev->bus && dev->bus->pm && dev->bus->pm->freeze) + ret = dev->bus->pm->freeze(dev); + else + ret = pm_generic_freeze(dev); + + if (ret || !swnode->node->pm->freeze) + return ret; + + return swnode->node->pm->freeze(dev); +} + +static int software_node_thaw(struct device *dev) +{ + struct swnode_pm_domain *domain = to_swnode_pm_domain(dev->pm_domain); + struct swnode *swnode = dev_to_swnode(dev); + int ret; + + if (swnode->node->pm->thaw) { + ret = swnode->node->pm->thaw(dev); + if (ret) + return ret; + } + + if (domain->primary && domain->primary->ops.thaw) + ret = domain->primary->ops.thaw(dev); + else if (dev->type && dev->type->pm && dev->type->pm->thaw) + ret = dev->type->pm->thaw(dev); + else if (dev->class && dev->class->pm && dev->class->pm->thaw) + ret = dev->class->pm->thaw(dev); + else if (dev->bus && dev->bus->pm && dev->bus->pm->thaw) + ret = dev->bus->pm->thaw(dev); + else + ret = pm_generic_thaw(dev); + + return ret; +} + +static int software_node_poweroff(struct device *dev) +{ + struct swnode_pm_domain *domain = to_swnode_pm_domain(dev->pm_domain); + struct swnode *swnode = dev_to_swnode(dev); + int ret; + + if (domain->primary && domain->primary->ops.poweroff) + ret = domain->primary->ops.poweroff(dev); + else if (dev->type && dev->type->pm && dev->type->pm->poweroff) + ret = dev->type->pm->poweroff(dev); + else if (dev->class && dev->class->pm && dev->class->pm->poweroff) + ret = dev->class->pm->poweroff(dev); + else if (dev->bus && dev->bus->pm && dev->bus->pm->poweroff) + ret = dev->bus->pm->poweroff(dev); + else + ret = pm_generic_poweroff(dev); + + if (ret || !swnode->node->pm->poweroff) + return ret; + + return swnode->node->pm->poweroff(dev); +} + +static int software_node_restore(struct device *dev) +{ + struct swnode_pm_domain *domain = to_swnode_pm_domain(dev->pm_domain); + struct swnode *swnode = dev_to_swnode(dev); + int ret; + + if (swnode->node->pm->restore) { + ret = swnode->node->pm->restore(dev); + if (ret) + return ret; + } + + if (domain->primary && domain->primary->ops.restore) + ret = domain->primary->ops.restore(dev); + else if (dev->type && dev->type->pm && dev->type->pm->restore) + ret = dev->type->pm->restore(dev); + else if (dev->class && dev->class->pm && dev->class->pm->restore) + ret = dev->class->pm->restore(dev); + else if (dev->bus && dev->bus->pm && dev->bus->pm->restore) + ret = dev->bus->pm->restore(dev); + else + ret = pm_generic_restore(dev); + + return ret; +} + +static int software_node_suspend_late(struct device *dev) +{ + struct swnode_pm_domain *domain = to_swnode_pm_domain(dev->pm_domain); + struct swnode *swnode = dev_to_swnode(dev); + int ret; + + if (domain->primary && domain->primary->ops.suspend_late) + ret = domain->primary->ops.suspend_late(dev); + else if (dev->type && dev->type->pm && dev->type->pm->suspend_late) + ret = dev->type->pm->suspend_late(dev); + else if (dev->class && dev->class->pm && dev->class->pm->suspend_late) + ret = dev->class->pm->suspend_late(dev); + else if (dev->bus && dev->bus->pm && dev->bus->pm->suspend_late) + ret = dev->bus->pm->suspend_late(dev); + else + ret = pm_generic_suspend_late(dev); + + if (ret || !swnode->node->pm->suspend_late) + return ret; + + return swnode->node->pm->suspend_late(dev); +} + +static int software_node_resume_early(struct device *dev) +{ + struct swnode_pm_domain *domain = to_swnode_pm_domain(dev->pm_domain); + struct swnode *swnode = dev_to_swnode(dev); + int ret; + + if (swnode->node->pm->resume_early) { + ret = swnode->node->pm->resume_early(dev); + if (ret) + return ret; + } + + if (domain->primary && domain->primary->ops.resume_early) + ret = domain->primary->ops.resume_early(dev); + else if (dev->type && dev->type->pm && dev->type->pm->resume_early) + ret = dev->type->pm->resume_early(dev); + else if (dev->class && dev->class->pm && dev->class->pm->resume_early) + ret = dev->class->pm->resume_early(dev); + else if (dev->bus && dev->bus->pm && dev->bus->pm->resume_early) + ret = dev->bus->pm->resume_early(dev); + else + pm_generic_resume_early(dev); + + return 0; +} + +static int software_node_freeze_late(struct device *dev) +{ + struct swnode_pm_domain *domain = to_swnode_pm_domain(dev->pm_domain); + struct swnode *swnode = dev_to_swnode(dev); + int ret; + + if (domain->primary && domain->primary->ops.freeze_late) + ret = domain->primary->ops.freeze_late(dev); + else if (dev->type && dev->type->pm && dev->type->pm->freeze_late) + ret = dev->type->pm->freeze_late(dev); + else if (dev->class && dev->class->pm && dev->class->pm->freeze_late) + ret = dev->class->pm->freeze_late(dev); + else if (dev->bus && dev->bus->pm && dev->bus->pm->freeze_late) + ret = dev->bus->pm->freeze_late(dev); + else + ret = pm_generic_freeze_late(dev); + + if (ret || !swnode->node->pm->freeze_late) + return ret; + + return swnode->node->pm->freeze_late(dev); +} + +static int software_node_thaw_early(struct device *dev) +{ + struct swnode_pm_domain *domain = to_swnode_pm_domain(dev->pm_domain); + struct swnode *swnode = dev_to_swnode(dev); + int ret; + + if (swnode->node->pm->thaw_early) { + ret = swnode->node->pm->thaw_early(dev); + if (ret) + return ret; + } + + if (domain->primary && domain->primary->ops.thaw_early) + ret = domain->primary->ops.thaw_early(dev); + else if (dev->type && dev->type->pm && dev->type->pm->thaw_early) + ret = dev->type->pm->thaw_early(dev); + else if (dev->class && dev->class->pm && dev->class->pm->thaw_early) + ret = dev->class->pm->thaw_early(dev); + else if (dev->bus && dev->bus->pm && dev->bus->pm->thaw_early) + ret = dev->bus->pm->thaw_early(dev); + else + ret = pm_generic_thaw_early(dev); + + return ret; +} + +static int software_node_poweroff_late(struct device *dev) +{ + struct swnode_pm_domain *domain = to_swnode_pm_domain(dev->pm_domain); + struct swnode *swnode = dev_to_swnode(dev); + int ret; + + if (domain->primary && domain->primary->ops.poweroff_late) + ret = domain->primary->ops.poweroff_late(dev); + else if (dev->type && dev->type->pm && dev->type->pm->poweroff_late) + ret = dev->type->pm->poweroff_late(dev); + else if (dev->class && dev->class->pm && dev->class->pm->poweroff_late) + ret = dev->class->pm->poweroff_late(dev); + else if (dev->bus && dev->bus->pm && dev->bus->pm->poweroff_late) + ret = dev->bus->pm->poweroff_late(dev); + else + ret = pm_generic_poweroff_late(dev); + + if (ret || !swnode->node->pm->poweroff_late) + return ret; + + return swnode->node->pm->poweroff(dev); +} + +static int software_node_restore_early(struct device *dev) +{ + struct swnode_pm_domain *domain = to_swnode_pm_domain(dev->pm_domain); + struct swnode *swnode = dev_to_swnode(dev); + int ret; + + if (swnode->node->pm->restore_early) { + ret = swnode->node->pm->restore_early(dev); + if (ret) + return ret; + } + + if (domain->primary && domain->primary->ops.restore_early) + ret = domain->primary->ops.restore_early(dev); + else if (dev->type && dev->type->pm && dev->type->pm->restore_early) + ret = dev->type->pm->restore_early(dev); + else if (dev->class && dev->class->pm && dev->class->pm->restore_early) + ret = dev->class->pm->restore_early(dev); + else if (dev->bus && dev->bus->pm && dev->bus->pm->restore_early) + ret = dev->bus->pm->restore_early(dev); + else + ret = pm_generic_restore_early(dev); + + return ret; +} + +static int software_node_suspend_noirq(struct device *dev) +{ + struct swnode_pm_domain *domain = to_swnode_pm_domain(dev->pm_domain); + struct swnode *swnode = dev_to_swnode(dev); + int ret; + + if (domain->primary && domain->primary->ops.suspend_noirq) + ret = domain->primary->ops.suspend_noirq(dev); + else if (dev->type && dev->type->pm && dev->type->pm->suspend_noirq) + ret = dev->type->pm->suspend_noirq(dev); + else if (dev->class && dev->class->pm && dev->class->pm->suspend_noirq) + ret = dev->class->pm->suspend_noirq(dev); + else if (dev->bus && dev->bus->pm && dev->bus->pm->suspend_noirq) + ret = dev->bus->pm->suspend_noirq(dev); + else + ret = pm_generic_suspend_noirq(dev); + + if (ret || !swnode->node->pm->suspend_noirq) + return ret; + + return swnode->node->pm->suspend_noirq(dev); +} + +static int software_node_resume_noirq(struct device *dev) +{ + struct swnode_pm_domain *domain = to_swnode_pm_domain(dev->pm_domain); + struct swnode *swnode = dev_to_swnode(dev); + int ret; + + if (swnode->node->pm->resume_noirq) { + ret = swnode->node->pm->resume_noirq(dev); + if (ret) + return ret; + } + + if (domain->primary && domain->primary->ops.resume_noirq) + ret = domain->primary->ops.resume_noirq(dev); + else if (dev->type && dev->type->pm && dev->type->pm->resume_noirq) + ret = dev->type->pm->resume_noirq(dev); + else if (dev->class && dev->class->pm && dev->class->pm->resume_noirq) + ret = dev->class->pm->resume_noirq(dev); + else if (dev->bus && dev->bus->pm && dev->bus->pm->resume_noirq) + ret = dev->bus->pm->resume_noirq(dev); + else + ret = pm_generic_resume_noirq(dev); + + return ret; +} + +static int software_node_freeze_noirq(struct device *dev) +{ + struct swnode_pm_domain *domain = to_swnode_pm_domain(dev->pm_domain); + struct swnode *swnode = dev_to_swnode(dev); + int ret; + + if (domain->primary && domain->primary->ops.freeze_noirq) + ret = domain->primary->ops.freeze_noirq(dev); + else if (dev->type && dev->type->pm && dev->type->pm->freeze_noirq) + ret = dev->type->pm->freeze_noirq(dev); + else if (dev->class && dev->class->pm && dev->class->pm->freeze_noirq) + ret = dev->class->pm->freeze_noirq(dev); + else if (dev->bus && dev->bus->pm && dev->bus->pm->freeze_noirq) + ret = dev->bus->pm->freeze_noirq(dev); + else + ret = pm_generic_freeze_noirq(dev); + + if (ret || !swnode->node->pm->freeze_noirq) + return ret; + + return swnode->node->pm->freeze_noirq(dev); +} + +static int software_node_thaw_noirq(struct device *dev) +{ + struct swnode_pm_domain *domain = to_swnode_pm_domain(dev->pm_domain); + struct swnode *swnode = dev_to_swnode(dev); + int ret; + + if (swnode->node->pm->thaw_noirq) { + ret = swnode->node->pm->thaw_noirq(dev); + if (ret) + return ret; + } + + if (domain->primary && domain->primary->ops.thaw_noirq) + ret = domain->primary->ops.thaw_noirq(dev); + else if (dev->type && dev->type->pm && dev->type->pm->thaw_noirq) + ret = dev->type->pm->thaw_noirq(dev); + else if (dev->class && dev->class->pm && dev->class->pm->thaw_noirq) + ret = dev->class->pm->thaw_noirq(dev); + else if (dev->bus && dev->bus->pm && dev->bus->pm->thaw_noirq) + ret = dev->bus->pm->thaw_noirq(dev); + else + ret = pm_generic_thaw_noirq(dev); + + return ret; +} + +static int software_node_poweroff_noirq(struct device *dev) +{ + struct swnode_pm_domain *domain = to_swnode_pm_domain(dev->pm_domain); + struct swnode *swnode = dev_to_swnode(dev); + int ret; + + if (domain->primary && domain->primary->ops.poweroff_noirq) + ret = domain->primary->ops.poweroff_noirq(dev); + else if (dev->type && dev->type->pm && dev->type->pm->poweroff_noirq) + ret = dev->type->pm->poweroff_noirq(dev); + else if (dev->class && dev->class->pm && dev->class->pm->poweroff_noirq) + ret = dev->class->pm->poweroff_noirq(dev); + else if (dev->bus && dev->bus->pm && dev->bus->pm->poweroff_noirq) + ret = dev->bus->pm->poweroff_noirq(dev); + else + ret = pm_generic_poweroff_noirq(dev); + + if (ret || !swnode->node->pm->poweroff) + return ret; + + return swnode->node->pm->poweroff_noirq(dev); +} + +static int software_node_restore_noirq(struct device *dev) +{ + struct swnode_pm_domain *domain = to_swnode_pm_domain(dev->pm_domain); + struct swnode *swnode = dev_to_swnode(dev); + int ret; + + if (swnode->node->pm->restore_noirq) { + ret = swnode->node->pm->restore_noirq(dev); + if (ret) + return ret; + } + + if (domain->primary && domain->primary->ops.restore_noirq) + ret = domain->primary->ops.restore_noirq(dev); + else if (dev->type && dev->type->pm && dev->type->pm->restore_noirq) + ret = dev->type->pm->restore_noirq(dev); + else if (dev->class && dev->class->pm && dev->class->pm->restore_noirq) + ret = dev->class->pm->restore_noirq(dev); + else if (dev->bus && dev->bus->pm && dev->bus->pm->restore_noirq) + ret = dev->bus->pm->restore_noirq(dev); + else + ret = pm_generic_restore_noirq(dev); + + return ret; +} +#endif /* CONFIG_PM_SLEEP */ + +static const struct dev_pm_ops software_node_pm_ops = { + .runtime_suspend = software_node_runtime_suspend, + .runtime_resume = software_node_runtime_resume, + .runtime_idle = software_node_runtime_idle, +#ifdef CONFIG_PM_SLEEP + .prepare = software_node_prepare, + .complete = software_node_complete, + .suspend = software_node_suspend, + .resume = software_node_resume, + .freeze = software_node_freeze, + .thaw = software_node_thaw, + .poweroff = software_node_poweroff, + .restore = software_node_restore, + .suspend_late = software_node_suspend_late, + .resume_early = software_node_resume_early, + .freeze_late = software_node_freeze_late, + .thaw_early = software_node_thaw_early, + .poweroff_late = software_node_poweroff_late, + .restore_early = software_node_restore_early, + .suspend_noirq = software_node_suspend_noirq, + .resume_noirq = software_node_resume_noirq, + .freeze_noirq = software_node_freeze_noirq, + .thaw_noirq = software_node_thaw_noirq, + .poweroff_noirq = software_node_poweroff_noirq, + .restore_noirq = software_node_restore_noirq, +#endif /* CONFIG_PM_SLEEP */ +}; + +static void software_node_dev_pm_detach(struct device *dev, bool power_off) +{ + struct swnode_pm_domain *domain = to_swnode_pm_domain(dev->pm_domain); + + if (domain->primary && domain->primary->detach) { + dev->pm_domain = domain->primary; + domain->primary->detach(dev, power_off); + } else { + dev_pm_domain_set(dev, NULL); + } + + kfree(domain); +} + +int software_node_dev_pm_attach(struct device *dev, bool power_on) +{ + struct swnode *swnode = dev_to_swnode(dev); + struct swnode_pm_domain *domain; + + if (!swnode || !swnode->node->pm) + return 0; + + domain = kzalloc(sizeof(*domain), GFP_KERNEL); + if (!domain) + return -ENOMEM; + + if (dev->pm_domain) + domain->pm_domain = *dev->pm_domain; + + domain->primary = dev->pm_domain; + domain->pm_domain.ops = software_node_pm_ops; + domain->pm_domain.detach = software_node_dev_pm_detach; + + dev_pm_domain_set(dev, &domain->pm_domain); + + return 0; +} +EXPORT_SYMBOL_GPL(software_node_dev_pm_attach); +#endif /* CONFIG_PM */ + /* -------------------------------------------------------------------------- */ /* fwnode operations */ @@ -845,20 +1527,13 @@ EXPORT_SYMBOL_GPL(fwnode_remove_software_node); int software_node_notify(struct device *dev, unsigned long action) { - struct fwnode_handle *fwnode = dev_fwnode(dev); struct swnode *swnode; int ret; - if (!fwnode) - return 0; - - if (!is_software_node(fwnode)) - fwnode = fwnode->secondary; - if (!is_software_node(fwnode)) + swnode = dev_to_swnode(dev); + if (!swnode) return 0; - swnode = to_swnode(fwnode); - switch (action) { case KOBJ_ADD: ret = sysfs_create_link(&dev->kobj, &swnode->kobj, diff --git a/include/linux/property.h b/include/linux/property.h index 2d4542629d80b..33b25c8bd4052 100644 --- a/include/linux/property.h +++ b/include/linux/property.h @@ -453,11 +453,13 @@ static inline void *device_connection_find_match(struct device *dev, * @name: Name of the software node * @parent: Parent of the software node * @properties: Array of device properties + * @pm: Power management operations */ struct software_node { const char *name; const struct software_node *parent; const struct property_entry *properties; + const struct dev_pm_ops *pm; }; bool is_software_node(const struct fwnode_handle *fwnode); @@ -479,6 +481,14 @@ int software_node_register(const struct software_node *node); void software_node_unregister(const struct software_node *node); int software_node_notify(struct device *dev, unsigned long action); +#ifdef CONFIG_PM +int software_node_dev_pm_attach(struct device *dev, bool power_on); +#else +static inline int software_node_dev_pm_attach(struct device *dev, bool power_on) +{ + return 0; +} +#endif /* CONFIG_PM */ struct fwnode_handle * fwnode_create_software_node(const struct property_entry *properties, From patchwork Thu Oct 29 10:59:41 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heikki Krogerus X-Patchwork-Id: 311148 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A0E7CC55178 for ; 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([10.237.72.28]) by fmsmga001.fm.intel.com with ESMTP; 29 Oct 2020 03:59:49 -0700 From: Heikki Krogerus To: "Rafael J. Wysocki" Cc: Felipe Balbi , Andy Shevchenko , Sakari Ailus , linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, linux-acpi@vger.kernel.org Subject: [PATCHv2 3/3] usb: dwc3: pci: Register a software node for the dwc3 platform device Date: Thu, 29 Oct 2020 13:59:41 +0300 Message-Id: <20201029105941.63410-4-heikki.krogerus@linux.intel.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201029105941.63410-1-heikki.krogerus@linux.intel.com> References: <20201029105941.63410-1-heikki.krogerus@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org By registering the software node directly instead of just the properties in it, the driver can take advantage of also the other features the software nodes have. Initially using the nodes for isolating the Intel Broxton specific power management quirk by handling it in Broxton's very own power management operations (which are supplied as part of the software node) instead of the drivers generic ones. Signed-off-by: Heikki Krogerus Cc: Felipe Balbi --- drivers/usb/dwc3/dwc3-pci.c | 175 ++++++++++++++++++------------------ 1 file changed, 86 insertions(+), 89 deletions(-) diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c index 242b6210380a4..43cc0f602820d 100644 --- a/drivers/usb/dwc3/dwc3-pci.c +++ b/drivers/usb/dwc3/dwc3-pci.c @@ -54,17 +54,12 @@ * struct dwc3_pci - Driver private structure * @dwc3: child dwc3 platform_device * @pci: our link to PCI bus - * @guid: _DSM GUID - * @has_dsm_for_pm: true for devices which need to run _DSM on runtime PM * @wakeup_work: work for asynchronous resume */ struct dwc3_pci { struct platform_device *dwc3; struct pci_dev *pci; - guid_t guid; - - unsigned int has_dsm_for_pm:1; struct work_struct wakeup_work; }; @@ -108,6 +103,50 @@ static int dwc3_byt_enable_ulpi_refclock(struct pci_dev *pci) return 0; } +#ifdef CONFIG_PM +static int dwc3_pci_intel_pm_dsm(struct device *dev, int param) +{ + union acpi_object *obj; + union acpi_object tmp; + union acpi_object argv4 = ACPI_INIT_DSM_ARGV4(1, &tmp); + guid_t guid; + int ret; + + ret = guid_parse(PCI_INTEL_BXT_DSM_GUID, &guid); + if (ret) + return ret; + + tmp.type = ACPI_TYPE_INTEGER; + tmp.integer.value = param; + + obj = acpi_evaluate_dsm(ACPI_HANDLE(dev), &guid, + 1, PCI_INTEL_BXT_FUNC_PMU_PWR, &argv4); + if (!obj) { + dev_err(dev, "failed to evaluate _DSM\n"); + return -EIO; + } + + ACPI_FREE(obj); + + return 0; +} + +static int dwc3_pci_intel_suspend(struct device *dev) +{ + return dwc3_pci_intel_pm_dsm(dev->parent, PCI_INTEL_BXT_STATE_D3); +} + +static int dwc3_pci_intel_resume(struct device *dev) +{ + return dwc3_pci_intel_pm_dsm(dev->parent, PCI_INTEL_BXT_STATE_D0); +} +#endif /* CONFIG_PM */ + +static const struct dev_pm_ops dwc3_pci_intel_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_intel_suspend, dwc3_pci_intel_resume) + SET_RUNTIME_PM_OPS(dwc3_pci_intel_suspend, dwc3_pci_intel_resume, NULL) +}; + static const struct property_entry dwc3_pci_intel_properties[] = { PROPERTY_ENTRY_STRING("dr_mode", "peripheral"), PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"), @@ -141,18 +180,28 @@ static const struct property_entry dwc3_pci_amd_properties[] = { {} }; +static const struct software_node dwc3_pci_intel_swnode = { + .properties = dwc3_pci_intel_properties, +}; + +static const struct software_node dwc3_pci_intel_pm_swnode = { + .properties = dwc3_pci_intel_properties, + .pm = &dwc3_pci_intel_pm_ops, +}; + +static const struct software_node dwc3_pci_intel_mrfld_swnode = { + .properties = dwc3_pci_mrfld_properties, +}; + +static const struct software_node dwc3_pci_amd_swnode = { + .properties = dwc3_pci_amd_properties, +}; + static int dwc3_pci_quirks(struct dwc3_pci *dwc) { struct pci_dev *pdev = dwc->pci; if (pdev->vendor == PCI_VENDOR_ID_INTEL) { - if (pdev->device == PCI_DEVICE_ID_INTEL_BXT || - pdev->device == PCI_DEVICE_ID_INTEL_BXT_M || - pdev->device == PCI_DEVICE_ID_INTEL_EHLLP) { - guid_parse(PCI_INTEL_BXT_DSM_GUID, &dwc->guid); - dwc->has_dsm_for_pm = true; - } - if (pdev->device == PCI_DEVICE_ID_INTEL_BYT) { struct gpio_desc *gpio; int ret; @@ -221,7 +270,6 @@ static void dwc3_pci_resume_work(struct work_struct *work) static int dwc3_pci_probe(struct pci_dev *pci, const struct pci_device_id *id) { - struct property_entry *p = (struct property_entry *)id->driver_data; struct dwc3_pci *dwc; struct resource res[2]; int ret; @@ -264,7 +312,7 @@ static int dwc3_pci_probe(struct pci_dev *pci, const struct pci_device_id *id) dwc->dwc3->dev.parent = dev; ACPI_COMPANION_SET(&dwc->dwc3->dev, ACPI_COMPANION(dev)); - ret = platform_device_add_properties(dwc->dwc3, p); + ret = device_add_software_node(&dwc->dwc3->dev, (void *)id->driver_data); if (ret < 0) goto err; @@ -287,6 +335,7 @@ static int dwc3_pci_probe(struct pci_dev *pci, const struct pci_device_id *id) return 0; err: + device_remove_software_node(&dwc->dwc3->dev); platform_device_put(dwc->dwc3); return ret; } @@ -303,121 +352,86 @@ static void dwc3_pci_remove(struct pci_dev *pci) #endif device_init_wakeup(&pci->dev, false); pm_runtime_get(&pci->dev); + device_remove_software_node(&dwc->dwc3->dev); platform_device_unregister(dwc->dwc3); } static const struct pci_device_id dwc3_pci_id_table[] = { { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_BSW), - (kernel_ulong_t) &dwc3_pci_intel_properties }, + (kernel_ulong_t) &dwc3_pci_intel_swnode, }, { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_BYT), - (kernel_ulong_t) &dwc3_pci_intel_properties, }, + (kernel_ulong_t) &dwc3_pci_intel_swnode, }, { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_MRFLD), - (kernel_ulong_t) &dwc3_pci_mrfld_properties, }, + (kernel_ulong_t) &dwc3_pci_intel_mrfld_swnode, }, { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_CMLLP), - (kernel_ulong_t) &dwc3_pci_intel_properties, }, + (kernel_ulong_t) &dwc3_pci_intel_swnode, }, { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_CMLH), - (kernel_ulong_t) &dwc3_pci_intel_properties, }, + (kernel_ulong_t) &dwc3_pci_intel_swnode, }, { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_SPTLP), - (kernel_ulong_t) &dwc3_pci_intel_properties, }, + (kernel_ulong_t) &dwc3_pci_intel_swnode, }, { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_SPTH), - (kernel_ulong_t) &dwc3_pci_intel_properties, }, + (kernel_ulong_t) &dwc3_pci_intel_swnode, }, { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_BXT), - (kernel_ulong_t) &dwc3_pci_intel_properties, }, + (kernel_ulong_t) &dwc3_pci_intel_pm_swnode, }, { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_BXT_M), - (kernel_ulong_t) &dwc3_pci_intel_properties, }, + (kernel_ulong_t) &dwc3_pci_intel_pm_swnode, }, { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_APL), - (kernel_ulong_t) &dwc3_pci_intel_properties, }, + (kernel_ulong_t) &dwc3_pci_intel_swnode, }, { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_KBP), - (kernel_ulong_t) &dwc3_pci_intel_properties, }, + (kernel_ulong_t) &dwc3_pci_intel_swnode, }, { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_GLK), - (kernel_ulong_t) &dwc3_pci_intel_properties, }, + (kernel_ulong_t) &dwc3_pci_intel_swnode, }, { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_CNPLP), - (kernel_ulong_t) &dwc3_pci_intel_properties, }, + (kernel_ulong_t) &dwc3_pci_intel_swnode, }, { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_CNPH), - (kernel_ulong_t) &dwc3_pci_intel_properties, }, + (kernel_ulong_t) &dwc3_pci_intel_swnode, }, { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_CNPV), - (kernel_ulong_t) &dwc3_pci_intel_properties, }, + (kernel_ulong_t) &dwc3_pci_intel_swnode, }, { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ICLLP), - (kernel_ulong_t) &dwc3_pci_intel_properties, }, + (kernel_ulong_t) &dwc3_pci_intel_swnode, }, { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_EHLLP), - (kernel_ulong_t) &dwc3_pci_intel_properties, }, + (kernel_ulong_t) &dwc3_pci_intel_pm_swnode }, { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_TGPLP), - (kernel_ulong_t) &dwc3_pci_intel_properties, }, + (kernel_ulong_t) &dwc3_pci_intel_swnode, }, { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_TGPH), - (kernel_ulong_t) &dwc3_pci_intel_properties, }, + (kernel_ulong_t) &dwc3_pci_intel_swnode, }, { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_JSP), - (kernel_ulong_t) &dwc3_pci_intel_properties, }, + (kernel_ulong_t) &dwc3_pci_intel_swnode, }, { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_NL_USB), - (kernel_ulong_t) &dwc3_pci_amd_properties, }, + (kernel_ulong_t) &dwc3_pci_amd_swnode, }, { } /* Terminating Entry */ }; MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table); -#if defined(CONFIG_PM) || defined(CONFIG_PM_SLEEP) -static int dwc3_pci_dsm(struct dwc3_pci *dwc, int param) -{ - union acpi_object *obj; - union acpi_object tmp; - union acpi_object argv4 = ACPI_INIT_DSM_ARGV4(1, &tmp); - - if (!dwc->has_dsm_for_pm) - return 0; - - tmp.type = ACPI_TYPE_INTEGER; - tmp.integer.value = param; - - obj = acpi_evaluate_dsm(ACPI_HANDLE(&dwc->pci->dev), &dwc->guid, - 1, PCI_INTEL_BXT_FUNC_PMU_PWR, &argv4); - if (!obj) { - dev_err(&dwc->pci->dev, "failed to evaluate _DSM\n"); - return -EIO; - } - - ACPI_FREE(obj); - - return 0; -} -#endif /* CONFIG_PM || CONFIG_PM_SLEEP */ - #ifdef CONFIG_PM static int dwc3_pci_runtime_suspend(struct device *dev) { - struct dwc3_pci *dwc = dev_get_drvdata(dev); - - if (device_can_wakeup(dev)) - return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D3); - - return -EBUSY; + return device_can_wakeup(dev) ? 0 : -EBUSY; } static int dwc3_pci_runtime_resume(struct device *dev) { struct dwc3_pci *dwc = dev_get_drvdata(dev); - int ret; - - ret = dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D0); - if (ret) - return ret; queue_work(pm_wq, &dwc->wakeup_work); @@ -425,24 +439,7 @@ static int dwc3_pci_runtime_resume(struct device *dev) } #endif /* CONFIG_PM */ -#ifdef CONFIG_PM_SLEEP -static int dwc3_pci_suspend(struct device *dev) -{ - struct dwc3_pci *dwc = dev_get_drvdata(dev); - - return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D3); -} - -static int dwc3_pci_resume(struct device *dev) -{ - struct dwc3_pci *dwc = dev_get_drvdata(dev); - - return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D0); -} -#endif /* CONFIG_PM_SLEEP */ - static const struct dev_pm_ops dwc3_pci_dev_pm_ops = { - SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_suspend, dwc3_pci_resume) SET_RUNTIME_PM_OPS(dwc3_pci_runtime_suspend, dwc3_pci_runtime_resume, NULL) };