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authorRafael J. Wysocki <rjw@sisk.pl>2012-08-07 01:11:14 +0200
committerRafael J. Wysocki <rjw@sisk.pl>2012-09-04 01:36:53 +0200
commit8bc0251de2932e603f8ed73b76ba2d64b2dc1d18 (patch)
treea29341739203de17f76c4044e5ad24b095e758f5 /drivers/base/power
parentfb7268be9f72bed6ae48554f00f2dcb2ef333bfc (diff)
PM / Domains: Add power-on function using names to identify domains
It sometimes is necessary to turn on a given PM domain when only the name of it is known and the domain pointer is not readily available. For this reason, add a new helper function, pm_genpd_name_poweron(), allowing the caller to turn on a PM domain using its name for identification. To avoid code duplication, move the domain lookup code to a separate function. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'drivers/base/power')
-rw-r--r--drivers/base/power/domain.c46
1 files changed, 31 insertions, 15 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index cddf818f493..4d633406f37 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -53,6 +53,24 @@
static LIST_HEAD(gpd_list);
static DEFINE_MUTEX(gpd_list_lock);
+static struct generic_pm_domain *pm_genpd_lookup_name(const char *domain_name)
+{
+ struct generic_pm_domain *genpd = NULL, *gpd;
+
+ if (IS_ERR_OR_NULL(domain_name))
+ return NULL;
+
+ mutex_lock(&gpd_list_lock);
+ list_for_each_entry(gpd, &gpd_list, gpd_list_node) {
+ if (!strcmp(gpd->name, domain_name)) {
+ genpd = gpd;
+ break;
+ }
+ }
+ mutex_unlock(&gpd_list_lock);
+ return genpd;
+}
+
#ifdef CONFIG_PM
struct generic_pm_domain *dev_to_genpd(struct device *dev)
@@ -262,6 +280,18 @@ int pm_genpd_poweron(struct generic_pm_domain *genpd)
return ret;
}
+/**
+ * pm_genpd_name_poweron - Restore power to a given PM domain and its masters.
+ * @domain_name: Name of the PM domain to power up.
+ */
+int pm_genpd_name_poweron(const char *domain_name)
+{
+ struct generic_pm_domain *genpd;
+
+ genpd = pm_genpd_lookup_name(domain_name);
+ return genpd ? pm_genpd_poweron(genpd) : -EINVAL;
+}
+
#endif /* CONFIG_PM */
#ifdef CONFIG_PM_RUNTIME
@@ -1475,21 +1505,7 @@ int __pm_genpd_of_add_device(struct device_node *genpd_node, struct device *dev,
int __pm_genpd_name_add_device(const char *domain_name, struct device *dev,
struct gpd_timing_data *td)
{
- struct generic_pm_domain *genpd = NULL, *gpd;
-
- if (IS_ERR_OR_NULL(domain_name) || IS_ERR_OR_NULL(dev))
- return -EINVAL;
-
- mutex_lock(&gpd_list_lock);
- list_for_each_entry(gpd, &gpd_list, gpd_list_node) {
- if (!strcmp(gpd->name, domain_name)) {
- genpd = gpd;
- break;
- }
- }
- mutex_unlock(&gpd_list_lock);
-
- return __pm_genpd_add_device(genpd, dev, td);
+ return __pm_genpd_add_device(pm_genpd_lookup_name(domain_name), dev, td);
}
/**