From patchwork Mon Aug 8 22:30:59 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rafael Wysocki X-Patchwork-Id: 1047152 Received: from smtp1.linux-foundation.org (smtp1.linux-foundation.org [140.211.169.13]) by demeter1.kernel.org (8.14.4/8.14.4) with ESMTP id p78MYBf0003558 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=FAIL) for ; Mon, 8 Aug 2011 22:34:31 GMT Received: from daredevil.linux-foundation.org (localhost [127.0.0.1]) by smtp1.linux-foundation.org (8.14.2/8.13.5/Debian-3ubuntu1.1) with ESMTP id p78MWl8T000304; Mon, 8 Aug 2011 15:32:48 -0700 Received: from ogre.sisk.pl (ogre.sisk.pl [217.79.144.158]) by smtp1.linux-foundation.org (8.14.2/8.13.5/Debian-3ubuntu1.1) with ESMTP id p78MWO4k032573 for ; Mon, 8 Aug 2011 15:32:26 -0700 Received: from localhost (localhost.localdomain [127.0.0.1]) by ogre.sisk.pl (Postfix) with ESMTP id C938F1B78AD; Mon, 8 Aug 2011 23:56:25 +0200 (CEST) Received: from ogre.sisk.pl ([127.0.0.1]) by localhost (ogre.sisk.pl [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 06429-01; Mon, 8 Aug 2011 23:55:51 +0200 (CEST) Received: from ferrari.rjw.lan (unknown [82.210.184.220]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ogre.sisk.pl (Postfix) with ESMTP id 2A1881B7802; Mon, 8 Aug 2011 23:55:51 +0200 (CEST) From: "Rafael J. Wysocki" To: Linux PM mailing list Date: Tue, 9 Aug 2011 00:30:59 +0200 User-Agent: KMail/1.13.6 (Linux/3.1.0-rc1+; KDE/4.6.0; x86_64; ; ) References: <201108090028.12698.rjw@sisk.pl> In-Reply-To: <201108090028.12698.rjw@sisk.pl> MIME-Version: 1.0 Message-Id: <201108090030.59408.rjw@sisk.pl> X-Virus-Scanned: amavisd-new at ogre.sisk.pl using MkS_Vir for Linux Received-SPF: pass (localhost is always allowed.) X-Spam-Status: No, hits=-3.93 required=5 tests=AWL, BAYES_00, OSDL_HEADER_SUBJECT_BRACKETED X-Spam-Checker-Version: SpamAssassin 3.2.4-osdl_revision__1.47__ X-MIMEDefang-Filter: lf$Revision: 1.188 $ X-Scanned-By: MIMEDefang 2.63 on 140.211.169.21 Cc: Greg KH , LKML , linux-sh@vger.kernel.org Subject: [linux-pm] [PATCH 1/4] PM: Introduce struct pm_subsys_data X-BeenThere: linux-pm@lists.linux-foundation.org X-Mailman-Version: 2.1.9 Precedence: list List-Id: Linux power management List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-pm-bounces@lists.linux-foundation.org Errors-To: linux-pm-bounces@lists.linux-foundation.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Mon, 08 Aug 2011 22:34:32 +0000 (UTC) From: Rafael J. Wysocki Introduce struct pm_subsys_data that may be subclassed by subsystems to store subsystem-specific information related to the device. Move the clock management fields accessed through the power.subsys_data pointer in struct device to the new strucutre. Signed-off-by: Rafael J. Wysocki --- arch/arm/mach-shmobile/pm-sh7372.c | 2 drivers/base/power/clock_ops.c | 122 +++++++++++++++++++------------------ include/linux/device.h | 5 + include/linux/pm.h | 10 ++- include/linux/pm_runtime.h | 8 +- 5 files changed, 85 insertions(+), 62 deletions(-) Index: linux-2.6/drivers/base/power/clock_ops.c =================================================================== --- linux-2.6.orig/drivers/base/power/clock_ops.c +++ linux-2.6/drivers/base/power/clock_ops.c @@ -17,11 +17,6 @@ #ifdef CONFIG_PM -struct pm_clk_data { - struct list_head clock_list; - struct mutex lock; -}; - enum pce_status { PCE_STATUS_NONE = 0, PCE_STATUS_ACQUIRED, @@ -36,11 +31,6 @@ struct pm_clock_entry { enum pce_status status; }; -static struct pm_clk_data *__to_pcd(struct device *dev) -{ - return dev ? dev->power.subsys_data : NULL; -} - /** * pm_clk_add - Start using a device clock for power management. * @dev: Device whose clock is going to be used for power management. @@ -51,10 +41,10 @@ static struct pm_clk_data *__to_pcd(stru */ int pm_clk_add(struct device *dev, const char *con_id) { - struct pm_clk_data *pcd = __to_pcd(dev); + struct pm_subsys_data *psd = dev_to_psd(dev); struct pm_clock_entry *ce; - if (!pcd) + if (!psd) return -EINVAL; ce = kzalloc(sizeof(*ce), GFP_KERNEL); @@ -73,9 +63,9 @@ int pm_clk_add(struct device *dev, const } } - mutex_lock(&pcd->lock); - list_add_tail(&ce->node, &pcd->clock_list); - mutex_unlock(&pcd->lock); + mutex_lock(&psd->lock); + list_add_tail(&ce->node, &psd->clock_list); + mutex_unlock(&psd->lock); return 0; } @@ -117,15 +107,15 @@ static void __pm_clk_remove(struct pm_cl */ void pm_clk_remove(struct device *dev, const char *con_id) { - struct pm_clk_data *pcd = __to_pcd(dev); + struct pm_subsys_data *psd = dev_to_psd(dev); struct pm_clock_entry *ce; - if (!pcd) + if (!psd) return; - mutex_lock(&pcd->lock); + mutex_lock(&psd->lock); - list_for_each_entry(ce, &pcd->clock_list, node) { + list_for_each_entry(ce, &psd->clock_list, node) { if (!con_id && !ce->con_id) { __pm_clk_remove(ce); break; @@ -137,29 +127,45 @@ void pm_clk_remove(struct device *dev, c } } - mutex_unlock(&pcd->lock); + mutex_unlock(&psd->lock); } /** * pm_clk_init - Initialize a device's list of power management clocks. * @dev: Device to initialize the list of PM clocks for. * - * Allocate a struct pm_clk_data object, initialize its lock member and - * make the @dev's power.subsys_data field point to it. + * Initialize the lock and clock_list members of the device's pm_subsys_data + * object. */ -int pm_clk_init(struct device *dev) +void pm_clk_init(struct device *dev) { - struct pm_clk_data *pcd; + struct pm_subsys_data *psd = dev_to_psd(dev); + + if (!psd) + return; - pcd = kzalloc(sizeof(*pcd), GFP_KERNEL); - if (!pcd) { + INIT_LIST_HEAD(&psd->clock_list); + mutex_init(&psd->lock); +} + +/** + * pm_clk_create - Create and initialize a device's list of PM clocks. + * @dev: Device to create and initialize the list of PM clocks for. + * + * Allocate a struct pm_subsys_data object, initialize its lock and clock_list + * members and make the @dev's power.subsys_data field point to it. + */ +int pm_clk_create(struct device *dev) +{ + struct pm_subsys_data *psd; + + psd = kzalloc(sizeof(*psd), GFP_KERNEL); + if (!psd) { dev_err(dev, "Not enough memory for PM clock data.\n"); return -ENOMEM; } - - INIT_LIST_HEAD(&pcd->clock_list); - mutex_init(&pcd->lock); - dev->power.subsys_data = pcd; + dev->power.subsys_data = psd; + pm_clk_init(dev); return 0; } @@ -168,27 +174,27 @@ int pm_clk_init(struct device *dev) * @dev: Device to destroy the list of PM clocks for. * * Clear the @dev's power.subsys_data field, remove the list of clock entries - * from the struct pm_clk_data object pointed to by it before and free + * from the struct pm_subsys_data object pointed to by it before and free * that object. */ void pm_clk_destroy(struct device *dev) { - struct pm_clk_data *pcd = __to_pcd(dev); + struct pm_subsys_data *psd = dev_to_psd(dev); struct pm_clock_entry *ce, *c; - if (!pcd) + if (!psd) return; dev->power.subsys_data = NULL; - mutex_lock(&pcd->lock); + mutex_lock(&psd->lock); - list_for_each_entry_safe_reverse(ce, c, &pcd->clock_list, node) + list_for_each_entry_safe_reverse(ce, c, &psd->clock_list, node) __pm_clk_remove(ce); - mutex_unlock(&pcd->lock); + mutex_unlock(&psd->lock); - kfree(pcd); + kfree(psd); } #endif /* CONFIG_PM */ @@ -218,17 +224,17 @@ static void pm_clk_acquire(struct device */ int pm_clk_suspend(struct device *dev) { - struct pm_clk_data *pcd = __to_pcd(dev); + struct pm_subsys_data *psd = dev_to_psd(dev); struct pm_clock_entry *ce; dev_dbg(dev, "%s()\n", __func__); - if (!pcd) + if (!psd) return 0; - mutex_lock(&pcd->lock); + mutex_lock(&psd->lock); - list_for_each_entry_reverse(ce, &pcd->clock_list, node) { + list_for_each_entry_reverse(ce, &psd->clock_list, node) { if (ce->status == PCE_STATUS_NONE) pm_clk_acquire(dev, ce); @@ -238,7 +244,7 @@ int pm_clk_suspend(struct device *dev) } } - mutex_unlock(&pcd->lock); + mutex_unlock(&psd->lock); return 0; } @@ -249,17 +255,17 @@ int pm_clk_suspend(struct device *dev) */ int pm_clk_resume(struct device *dev) { - struct pm_clk_data *pcd = __to_pcd(dev); + struct pm_subsys_data *psd = dev_to_psd(dev); struct pm_clock_entry *ce; dev_dbg(dev, "%s()\n", __func__); - if (!pcd) + if (!psd) return 0; - mutex_lock(&pcd->lock); + mutex_lock(&psd->lock); - list_for_each_entry(ce, &pcd->clock_list, node) { + list_for_each_entry(ce, &psd->clock_list, node) { if (ce->status == PCE_STATUS_NONE) pm_clk_acquire(dev, ce); @@ -269,7 +275,7 @@ int pm_clk_resume(struct device *dev) } } - mutex_unlock(&pcd->lock); + mutex_unlock(&psd->lock); return 0; } @@ -307,7 +313,7 @@ static int pm_clk_notify(struct notifier if (dev->pm_domain) break; - error = pm_clk_init(dev); + error = pm_clk_create(dev); if (error) break; @@ -342,21 +348,21 @@ static int pm_clk_notify(struct notifier */ int pm_clk_suspend(struct device *dev) { - struct pm_clk_data *pcd = __to_pcd(dev); + struct pm_subsys_data *psd = dev_to_psd(dev); struct pm_clock_entry *ce; dev_dbg(dev, "%s()\n", __func__); /* If there is no driver, the clocks are already disabled. */ - if (!pcd || !dev->driver) + if (!psd || !dev->driver) return 0; - mutex_lock(&pcd->lock); + mutex_lock(&psd->lock); - list_for_each_entry_reverse(ce, &pcd->clock_list, node) + list_for_each_entry_reverse(ce, &psd->clock_list, node) clk_disable(ce->clk); - mutex_unlock(&pcd->lock); + mutex_unlock(&psd->lock); return 0; } @@ -367,21 +373,21 @@ int pm_clk_suspend(struct device *dev) */ int pm_clk_resume(struct device *dev) { - struct pm_clk_data *pcd = __to_pcd(dev); + struct pm_subsys_data *psd = dev_to_psd(dev); struct pm_clock_entry *ce; dev_dbg(dev, "%s()\n", __func__); /* If there is no driver, the clocks should remain disabled. */ - if (!pcd || !dev->driver) + if (!psd || !dev->driver) return 0; - mutex_lock(&pcd->lock); + mutex_lock(&psd->lock); - list_for_each_entry(ce, &pcd->clock_list, node) + list_for_each_entry(ce, &psd->clock_list, node) clk_enable(ce->clk); - mutex_unlock(&pcd->lock); + mutex_unlock(&psd->lock); return 0; } Index: linux-2.6/include/linux/device.h =================================================================== --- linux-2.6.orig/include/linux/device.h +++ linux-2.6/include/linux/device.h @@ -636,6 +636,11 @@ static inline void set_dev_node(struct d } #endif +static inline struct pm_subsys_data *dev_to_psd(struct device *dev) +{ + return dev ? dev->power.subsys_data : NULL; +} + static inline unsigned int dev_get_uevent_suppress(const struct device *dev) { return dev->kobj.uevent_suppress; Index: linux-2.6/include/linux/pm.h =================================================================== --- linux-2.6.orig/include/linux/pm.h +++ linux-2.6/include/linux/pm.h @@ -24,6 +24,7 @@ #include #include #include +#include #include #include #include @@ -421,6 +422,13 @@ enum rpm_request { struct wakeup_source; +struct pm_subsys_data { + struct mutex lock; +#ifdef CONFIG_PM_CLK + struct list_head clock_list; +#endif +}; + struct dev_pm_info { pm_message_t power_state; unsigned int can_wakeup:1; @@ -462,7 +470,7 @@ struct dev_pm_info { unsigned long suspended_jiffies; unsigned long accounting_timestamp; #endif - void *subsys_data; /* Owned by the subsystem. */ + struct pm_subsys_data *subsys_data; /* Owned by the subsystem. */ }; extern void update_pm_runtime_accounting(struct device *dev); Index: linux-2.6/arch/arm/mach-shmobile/pm-sh7372.c =================================================================== --- linux-2.6.orig/arch/arm/mach-shmobile/pm-sh7372.c +++ linux-2.6/arch/arm/mach-shmobile/pm-sh7372.c @@ -115,7 +115,7 @@ void sh7372_add_device_to_domain(struct struct device *dev = &pdev->dev; if (!dev->power.subsys_data) { - pm_clk_init(dev); + pm_clk_create(dev); pm_clk_add(dev, NULL); } pm_genpd_add_device(&sh7372_pd->genpd, dev); Index: linux-2.6/include/linux/pm_runtime.h =================================================================== --- linux-2.6.orig/include/linux/pm_runtime.h +++ linux-2.6/include/linux/pm_runtime.h @@ -258,14 +258,18 @@ struct pm_clk_notifier_block { }; #ifdef CONFIG_PM_CLK -extern int pm_clk_init(struct device *dev); +extern void pm_clk_init(struct device *dev); +extern int pm_clk_create(struct device *dev); extern void pm_clk_destroy(struct device *dev); extern int pm_clk_add(struct device *dev, const char *con_id); extern void pm_clk_remove(struct device *dev, const char *con_id); extern int pm_clk_suspend(struct device *dev); extern int pm_clk_resume(struct device *dev); #else -static inline int pm_clk_init(struct device *dev) +static inline void pm_clk_init(struct device *dev) +{ +} +static inline int pm_clk_create(struct device *dev) { return -EINVAL; }