lkml.org 
[lkml]   [2012]   [Jul]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[RFC][PATCH 13/14] PM / Domains: Introduce pm_genpd_present()
Date
From: Rafael J. Wysocki <rjw@sisk.pl>

Introduce function pm_genpd_present() allowing the caller to check if
the given generic PM domain has been initialized.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
---
drivers/base/power/domain.c | 22 ++++++++++++++++++++++
include/linux/pm_domain.h | 5 +++++
2 files changed, 27 insertions(+)

Index: linux/drivers/base/power/domain.c
===================================================================
--- linux.orig/drivers/base/power/domain.c
+++ linux/drivers/base/power/domain.c
@@ -2089,3 +2089,25 @@ void pm_genpd_init(struct generic_pm_dom
list_add(&genpd->gpd_list_node, &gpd_list);
mutex_unlock(&gpd_list_lock);
}
+
+/**
+ * pm_genpd_present - Check if the given PM domain has been initialized
+ * @genpd: PM domain to check.
+ */
+bool pm_genpd_present(struct generic_pm_domain *genpd)
+{
+ struct generic_pm_domain *gpd = NULL;
+
+ if (IS_ERR_OR_NULL(genpd))
+ return false;
+
+ mutex_lock(&gpd_list_lock);
+
+ list_for_each_entry(gpd, &gpd_list, gpd_list_node)
+ if (gpd == genpd)
+ break;
+
+ mutex_unlock(&gpd_list_lock);
+
+ return gpd == genpd;
+}
Index: linux/include/linux/pm_domain.h
===================================================================
--- linux.orig/include/linux/pm_domain.h
+++ linux/include/linux/pm_domain.h
@@ -161,6 +161,7 @@ extern int genpd_attach_cpuidle(struct g
extern int genpd_detach_cpuidle(struct generic_pm_domain *genpd);
extern void pm_genpd_init(struct generic_pm_domain *genpd,
struct dev_power_governor *gov, bool is_off);
+extern bool pm_genpd_present(struct generic_pm_domain *genpd);

extern int pm_genpd_poweron(struct generic_pm_domain *genpd);
extern int pm_genpd_name_poweron(const char *domain_name);
@@ -239,6 +240,10 @@ static inline void pm_genpd_init(struct
struct dev_power_governor *gov, bool is_off)
{
}
+static inline bool pm_genpd_present(struct generic_pm_domain *genpd)
+{
+ return false;
+}
static inline int pm_genpd_poweron(struct generic_pm_domain *genpd)
{
return -ENOSYS;


\
 
 \ /
  Last update: 2012-07-17 00:21    [W:0.088 / U:4.788 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site