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Subject[PATCH 3/3] PM / Domains: Add operations related to cpuidle using domain names
Date

Make it possible to use domain names in operations connecting cpuidle
to and disconnecting it from a PM domain. This is useful on
platforms where PM domain objects are organized in such a way that
the names of the domains are easier to use than the addresses of
those objects.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
---
drivers/base/power/domain.c | 19 +++++++++++++++++++
include/linux/pm_domain.h | 10 ++++++++++
2 files changed, 29 insertions(+)

Index: linux/drivers/base/power/domain.c
===================================================================
--- linux.orig/drivers/base/power/domain.c
+++ linux/drivers/base/power/domain.c
@@ -1888,6 +1888,16 @@ int pm_genpd_attach_cpuidle(struct gener
}

/**
+ * pm_genpd_name_attach_cpuidle - Find PM domain and connect cpuidle to it.
+ * @name: Name of the domain to connect to cpuidle.
+ * @state: cpuidle state this domain can manipulate.
+ */
+int pm_genpd_name_attach_cpuidle(const char *name, int state)
+{
+ return pm_genpd_attach_cpuidle(pm_genpd_lookup_name(name), state);
+}
+
+/**
* pm_genpd_detach_cpuidle - Remove the cpuidle connection from a PM domain.
* @genpd: PM domain to remove the cpuidle connection from.
*
@@ -1925,6 +1935,15 @@ int pm_genpd_detach_cpuidle(struct gener
return ret;
}

+/**
+ * pm_genpd_name_detach_cpuidle - Find PM domain and disconnect cpuidle from it.
+ * @name: Name of the domain to disconnect cpuidle from.
+ */
+int pm_genpd_name_detach_cpuidle(const char *name)
+{
+ return pm_genpd_detach_cpuidle(pm_genpd_lookup_name(name));
+}
+
/* Default device callbacks for generic PM domains. */

/**
Index: linux/include/linux/pm_domain.h
===================================================================
--- linux.orig/include/linux/pm_domain.h
+++ linux/include/linux/pm_domain.h
@@ -156,7 +156,9 @@ extern int pm_genpd_add_callbacks(struct
struct gpd_timing_data *td);
extern int __pm_genpd_remove_callbacks(struct device *dev, bool clear_td);
extern int pm_genpd_attach_cpuidle(struct generic_pm_domain *genpd, int state);
+extern int pm_genpd_name_attach_cpuidle(const char *name, int state);
extern int pm_genpd_detach_cpuidle(struct generic_pm_domain *genpd);
+extern int pm_genpd_name_detach_cpuidle(const char *name);
extern void pm_genpd_init(struct generic_pm_domain *genpd,
struct dev_power_governor *gov, bool is_off);

@@ -229,10 +231,18 @@ static inline int pm_genpd_attach_cpuidl
{
return -ENOSYS;
}
+static inline int pm_genpd_name_attach_cpuidle(const char *name, int state)
+{
+ return -ENOSYS;
+}
static inline int pm_genpd_detach_cpuidle(struct generic_pm_domain *genpd)
{
return -ENOSYS;
}
+static inline int pm_genpd_name_detach_cpuidle(const char *name)
+{
+ return -ENOSYS;
+}
static inline void pm_genpd_init(struct generic_pm_domain *genpd,
struct dev_power_governor *gov, bool is_off)
{


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