From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Rafael J. Wysocki" Date: Sun, 10 Jul 2011 20:46:55 +0000 Subject: [PATCH 1/2] PM / Domains: Introduce function to power off all unused PM domains Message-Id: <201107102246.56059.rjw@sisk.pl> List-Id: References: <201107102246.05107.rjw@sisk.pl> In-Reply-To: <201107102246.05107.rjw@sisk.pl> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Linux PM mailing list Cc: Magnus Damm , LKML , Linux-SH From: Rafael J. Wysocki Add a new function pm_genpd_poweroff_unused() queuing up the execution of pm_genpd_poweroff() for every initialized generic PM domain. Calling it will cause every generic PM domain without devices in use to be powered off. Signed-off-by: Rafael J. Wysocki --- drivers/base/power/domain.c | 21 +++++++++++++++++++++ include/linux/pm_domain.h | 3 +++ 2 files changed, 24 insertions(+) Index: linux-2.6/include/linux/pm_domain.h =================================--- linux-2.6.orig/include/linux/pm_domain.h +++ linux-2.6/include/linux/pm_domain.h @@ -24,6 +24,7 @@ struct dev_power_governor { struct generic_pm_domain { struct dev_pm_domain domain; /* PM domain operations */ + struct list_head gpd_list_node; /* Node in the global PM domains list */ struct list_head sd_node; /* Node in the parent's subdomain list */ struct generic_pm_domain *parent; /* Parent PM domain */ struct list_head sd_list; /* List of dubdomains */ @@ -71,6 +72,7 @@ extern int pm_genpd_remove_subdomain(str extern void pm_genpd_init(struct generic_pm_domain *genpd, struct dev_power_governor *gov, bool is_off); extern int pm_genpd_poweron(struct generic_pm_domain *genpd); +extern void pm_genpd_poweroff_unused(void); #else static inline int pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev) @@ -98,6 +100,7 @@ static inline int pm_genpd_poweron(struc { return -ENOSYS; } +static inline void pm_genpd_poweroff_unused(void) {} #endif #endif /* _LINUX_PM_DOMAIN_H */ Index: linux-2.6/drivers/base/power/domain.c =================================--- linux-2.6.orig/drivers/base/power/domain.c +++ linux-2.6/drivers/base/power/domain.c @@ -16,6 +16,9 @@ #include #include +static LIST_HEAD(gpd_list); +static DEFINE_MUTEX(gpd_list_lock); + #ifdef CONFIG_PM static struct generic_pm_domain *dev_to_genpd(struct device *dev) @@ -1241,4 +1244,22 @@ void pm_genpd_init(struct generic_pm_dom genpd->domain.ops.restore_noirq = pm_genpd_restore_noirq; genpd->domain.ops.restore = pm_genpd_restore; genpd->domain.ops.complete = pm_genpd_complete; + mutex_lock(&gpd_list_lock); + list_add(&genpd->gpd_list_node, &gpd_list); + mutex_unlock(&gpd_list_lock); +} + +/** + * pm_genpd_poweroff_unused - Power off all PM domains with no devices in use. + */ +void pm_genpd_poweroff_unused(void) +{ + struct generic_pm_domain *genpd; + + mutex_lock(&gpd_list_lock); + + list_for_each_entry(genpd, &gpd_list, gpd_list_node) + genpd_queue_power_off_work(genpd); + + mutex_unlock(&gpd_list_lock); } From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756674Ab1GJUrg (ORCPT ); Sun, 10 Jul 2011 16:47:36 -0400 Received: from ogre.sisk.pl ([217.79.144.158]:43412 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756120Ab1GJUr2 (ORCPT ); Sun, 10 Jul 2011 16:47:28 -0400 From: "Rafael J. Wysocki" To: Linux PM mailing list Subject: [PATCH 1/2] PM / Domains: Introduce function to power off all unused PM domains Date: Sun, 10 Jul 2011 22:46:55 +0200 User-Agent: KMail/1.13.6 (Linux/3.0.0-rc6+; KDE/4.6.0; x86_64; ; ) Cc: Magnus Damm , LKML , "Linux-SH" References: <201107102246.05107.rjw@sisk.pl> In-Reply-To: <201107102246.05107.rjw@sisk.pl> MIME-Version: 1.0 Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <201107102246.56059.rjw@sisk.pl> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Rafael J. Wysocki Add a new function pm_genpd_poweroff_unused() queuing up the execution of pm_genpd_poweroff() for every initialized generic PM domain. Calling it will cause every generic PM domain without devices in use to be powered off. Signed-off-by: Rafael J. Wysocki --- drivers/base/power/domain.c | 21 +++++++++++++++++++++ include/linux/pm_domain.h | 3 +++ 2 files changed, 24 insertions(+) Index: linux-2.6/include/linux/pm_domain.h =================================================================== --- linux-2.6.orig/include/linux/pm_domain.h +++ linux-2.6/include/linux/pm_domain.h @@ -24,6 +24,7 @@ struct dev_power_governor { struct generic_pm_domain { struct dev_pm_domain domain; /* PM domain operations */ + struct list_head gpd_list_node; /* Node in the global PM domains list */ struct list_head sd_node; /* Node in the parent's subdomain list */ struct generic_pm_domain *parent; /* Parent PM domain */ struct list_head sd_list; /* List of dubdomains */ @@ -71,6 +72,7 @@ extern int pm_genpd_remove_subdomain(str extern void pm_genpd_init(struct generic_pm_domain *genpd, struct dev_power_governor *gov, bool is_off); extern int pm_genpd_poweron(struct generic_pm_domain *genpd); +extern void pm_genpd_poweroff_unused(void); #else static inline int pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev) @@ -98,6 +100,7 @@ static inline int pm_genpd_poweron(struc { return -ENOSYS; } +static inline void pm_genpd_poweroff_unused(void) {} #endif #endif /* _LINUX_PM_DOMAIN_H */ Index: linux-2.6/drivers/base/power/domain.c =================================================================== --- linux-2.6.orig/drivers/base/power/domain.c +++ linux-2.6/drivers/base/power/domain.c @@ -16,6 +16,9 @@ #include #include +static LIST_HEAD(gpd_list); +static DEFINE_MUTEX(gpd_list_lock); + #ifdef CONFIG_PM static struct generic_pm_domain *dev_to_genpd(struct device *dev) @@ -1241,4 +1244,22 @@ void pm_genpd_init(struct generic_pm_dom genpd->domain.ops.restore_noirq = pm_genpd_restore_noirq; genpd->domain.ops.restore = pm_genpd_restore; genpd->domain.ops.complete = pm_genpd_complete; + mutex_lock(&gpd_list_lock); + list_add(&genpd->gpd_list_node, &gpd_list); + mutex_unlock(&gpd_list_lock); +} + +/** + * pm_genpd_poweroff_unused - Power off all PM domains with no devices in use. + */ +void pm_genpd_poweroff_unused(void) +{ + struct generic_pm_domain *genpd; + + mutex_lock(&gpd_list_lock); + + list_for_each_entry(genpd, &gpd_list, gpd_list_node) + genpd_queue_power_off_work(genpd); + + mutex_unlock(&gpd_list_lock); }