Merge branch 'pm-domains'
* pm-domains:
PM / Domains: Fix compilation warning related to genpd_start_dev_no_timing()
PM / Domains: Operations related to cpuidle using domain names
PM / Domains: Document cpuidle-related functions and change their names
PM / Domains: Add power-on function using names to identify domains
PM / Domains: Make it possible to use names when adding subdomains
PM / Domains: Make it possible to use domain names when adding devices
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 5f4606f..c22b869 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)
@@ -75,12 +93,6 @@
start_latency_ns, "start");
}
-static int genpd_start_dev_no_timing(struct generic_pm_domain *genpd,
- struct device *dev)
-{
- return GENPD_DEV_CALLBACK(genpd, int, start, dev);
-}
-
static bool genpd_sd_counter_dec(struct generic_pm_domain *genpd)
{
bool ret = false;
@@ -262,10 +274,28 @@
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
+static int genpd_start_dev_no_timing(struct generic_pm_domain *genpd,
+ struct device *dev)
+{
+ return GENPD_DEV_CALLBACK(genpd, int, start, dev);
+}
+
static int genpd_save_dev(struct generic_pm_domain *genpd, struct device *dev)
{
return GENPD_DEV_TIMED_CALLBACK(genpd, int, save_state, dev,
@@ -1465,6 +1495,19 @@
return __pm_genpd_add_device(genpd, dev, td);
}
+
+/**
+ * __pm_genpd_name_add_device - Find I/O PM domain and add a device to it.
+ * @domain_name: Name of the PM domain to add the device to.
+ * @dev: Device to be added.
+ * @td: Set of PM QoS timing parameters to attach to the device.
+ */
+int __pm_genpd_name_add_device(const char *domain_name, struct device *dev,
+ struct gpd_timing_data *td)
+{
+ return __pm_genpd_add_device(pm_genpd_lookup_name(domain_name), dev, td);
+}
+
/**
* pm_genpd_remove_device - Remove a device from an I/O PM domain.
* @genpd: PM domain to remove the device from.
@@ -1557,7 +1600,8 @@
struct gpd_link *link;
int ret = 0;
- if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(subdomain))
+ if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(subdomain)
+ || genpd == subdomain)
return -EINVAL;
start:
@@ -1604,6 +1648,35 @@
}
/**
+ * pm_genpd_add_subdomain_names - Add a subdomain to an I/O PM domain.
+ * @master_name: Name of the master PM domain to add the subdomain to.
+ * @subdomain_name: Name of the subdomain to be added.
+ */
+int pm_genpd_add_subdomain_names(const char *master_name,
+ const char *subdomain_name)
+{
+ struct generic_pm_domain *master = NULL, *subdomain = NULL, *gpd;
+
+ if (IS_ERR_OR_NULL(master_name) || IS_ERR_OR_NULL(subdomain_name))
+ return -EINVAL;
+
+ mutex_lock(&gpd_list_lock);
+ list_for_each_entry(gpd, &gpd_list, gpd_list_node) {
+ if (!master && !strcmp(gpd->name, master_name))
+ master = gpd;
+
+ if (!subdomain && !strcmp(gpd->name, subdomain_name))
+ subdomain = gpd;
+
+ if (master && subdomain)
+ break;
+ }
+ mutex_unlock(&gpd_list_lock);
+
+ return pm_genpd_add_subdomain(master, subdomain);
+}
+
+/**
* pm_genpd_remove_subdomain - Remove a subdomain from an I/O PM domain.
* @genpd: Master PM domain to remove the subdomain from.
* @subdomain: Subdomain to be removed.
@@ -1756,7 +1829,16 @@
}
EXPORT_SYMBOL_GPL(__pm_genpd_remove_callbacks);
-int genpd_attach_cpuidle(struct generic_pm_domain *genpd, int state)
+/**
+ * pm_genpd_attach_cpuidle - Connect the given PM domain with cpuidle.
+ * @genpd: PM domain to be connected with cpuidle.
+ * @state: cpuidle state this domain can disable/enable.
+ *
+ * Make a PM domain behave as though it contained a CPU core, that is, instead
+ * of calling its power down routine it will enable the given cpuidle state so
+ * that the cpuidle subsystem can power it down (if possible and desirable).
+ */
+int pm_genpd_attach_cpuidle(struct generic_pm_domain *genpd, int state)
{
struct cpuidle_driver *cpuidle_drv;
struct gpd_cpu_data *cpu_data;
@@ -1805,7 +1887,24 @@
goto out;
}
-int genpd_detach_cpuidle(struct generic_pm_domain *genpd)
+/**
+ * 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.
+ *
+ * Remove the cpuidle connection set up by pm_genpd_attach_cpuidle() from the
+ * given PM domain.
+ */
+int pm_genpd_detach_cpuidle(struct generic_pm_domain *genpd)
{
struct gpd_cpu_data *cpu_data;
struct cpuidle_state *idle_state;
@@ -1836,6 +1935,15 @@
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. */
/**
diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
index 08adf8e..7c1d252 100644
--- a/include/linux/pm_domain.h
+++ b/include/linux/pm_domain.h
@@ -138,35 +138,32 @@
struct device *dev,
struct gpd_timing_data *td);
-static inline int pm_genpd_add_device(struct generic_pm_domain *genpd,
- struct device *dev)
-{
- return __pm_genpd_add_device(genpd, dev, NULL);
-}
-
-static inline int pm_genpd_of_add_device(struct device_node *genpd_node,
- struct device *dev)
-{
- return __pm_genpd_of_add_device(genpd_node, dev, NULL);
-}
+extern int __pm_genpd_name_add_device(const char *domain_name,
+ struct device *dev,
+ struct gpd_timing_data *td);
extern int pm_genpd_remove_device(struct generic_pm_domain *genpd,
struct device *dev);
extern void pm_genpd_dev_need_restore(struct device *dev, bool val);
extern int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
struct generic_pm_domain *new_subdomain);
+extern int pm_genpd_add_subdomain_names(const char *master_name,
+ const char *subdomain_name);
extern int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
struct generic_pm_domain *target);
extern int pm_genpd_add_callbacks(struct device *dev,
struct gpd_dev_ops *ops,
struct gpd_timing_data *td);
extern int __pm_genpd_remove_callbacks(struct device *dev, bool clear_td);
-extern int genpd_attach_cpuidle(struct generic_pm_domain *genpd, int state);
-extern int genpd_detach_cpuidle(struct generic_pm_domain *genpd);
+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);
extern int pm_genpd_poweron(struct generic_pm_domain *genpd);
+extern int pm_genpd_name_poweron(const char *domain_name);
extern bool default_stop_ok(struct device *dev);
@@ -187,8 +184,15 @@
{
return -ENOSYS;
}
-static inline int pm_genpd_add_device(struct generic_pm_domain *genpd,
- struct device *dev)
+static inline int __pm_genpd_of_add_device(struct device_node *genpd_node,
+ struct device *dev,
+ struct gpd_timing_data *td)
+{
+ return -ENOSYS;
+}
+static inline int __pm_genpd_name_add_device(const char *domain_name,
+ struct device *dev,
+ struct gpd_timing_data *td)
{
return -ENOSYS;
}
@@ -203,6 +207,11 @@
{
return -ENOSYS;
}
+static inline int pm_genpd_add_subdomain_names(const char *master_name,
+ const char *subdomain_name)
+{
+ return -ENOSYS;
+}
static inline int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
struct generic_pm_domain *target)
{
@@ -218,11 +227,19 @@
{
return -ENOSYS;
}
-static inline int genpd_attach_cpuidle(struct generic_pm_domain *genpd, int st)
+static inline int pm_genpd_attach_cpuidle(struct generic_pm_domain *genpd, int st)
{
return -ENOSYS;
}
-static inline int genpd_detach_cpuidle(struct generic_pm_domain *genpd)
+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;
}
@@ -234,6 +251,10 @@
{
return -ENOSYS;
}
+static inline int pm_genpd_name_poweron(const char *domain_name)
+{
+ return -ENOSYS;
+}
static inline bool default_stop_ok(struct device *dev)
{
return false;
@@ -242,6 +263,24 @@
#define pm_domain_always_on_gov NULL
#endif
+static inline int pm_genpd_add_device(struct generic_pm_domain *genpd,
+ struct device *dev)
+{
+ return __pm_genpd_add_device(genpd, dev, NULL);
+}
+
+static inline int pm_genpd_of_add_device(struct device_node *genpd_node,
+ struct device *dev)
+{
+ return __pm_genpd_of_add_device(genpd_node, dev, NULL);
+}
+
+static inline int pm_genpd_name_add_device(const char *domain_name,
+ struct device *dev)
+{
+ return __pm_genpd_name_add_device(domain_name, dev, NULL);
+}
+
static inline int pm_genpd_remove_callbacks(struct device *dev)
{
return __pm_genpd_remove_callbacks(dev, true);