Merge branch 'pm-domains' into pm-for-linus

* pm-domains:
  PM / Domains: Split device PM domain data into base and need_restore
  ARM: mach-shmobile: sh7372 sleep warning fixes
  ARM: mach-shmobile: sh7372 A3SM support
  ARM: mach-shmobile: sh7372 generic suspend/resume support
  PM / Domains: Preliminary support for devices with power.irq_safe set
  PM: Move clock-related definitions and headers to separate file
  PM / Domains: Use power.sybsys_data to reduce overhead
  PM: Reference counting of power.subsys_data
  PM: Introduce struct pm_subsys_data
  ARM / shmobile: Make A3RV be a subdomain of A4LC on SH7372
  PM / Domains: Rename argument of pm_genpd_add_subdomain()
  PM / Domains: Rename GPD_STATE_WAIT_PARENT to GPD_STATE_WAIT_MASTER
  PM / Domains: Allow generic PM domains to have multiple masters
  PM / Domains: Add "wait for parent" status for generic PM domains
  PM / Domains: Make pm_genpd_poweron() always survive parent removal
  PM / Domains: Do not take parent locks to modify subdomain counters
  PM / Domains: Implement subdomain counters as atomic fields

5 files changed, 114 insertions, 50 deletions

diff --git a/include/linux/device.h b/include/linux/device.h
index c20dfbfc49b..5d200ed0071 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -636,6 +636,11 @@ static inline void set_dev_node(struct device *dev, int node)
 }
 #endif
 
+static inline struct pm_subsys_data *dev_to_psd(struct device *dev)
+{
+	return dev ? dev->power.subsys_data : NULL;
+}
+
 static inline unsigned int dev_get_uevent_suppress(const struct device *dev)
 {
 	return dev->kobj.uevent_suppress;
diff --git a/include/linux/pm.h b/include/linux/pm.h
index 18de9f89349..f497ed06ee1 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -423,6 +423,22 @@ enum rpm_request {
 
 struct wakeup_source;
 
+struct pm_domain_data {
+	struct list_head list_node;
+	struct device *dev;
+};
+
+struct pm_subsys_data {
+	spinlock_t lock;
+	unsigned int refcount;
+#ifdef CONFIG_PM_CLK
+	struct list_head clock_list;
+#endif
+#ifdef CONFIG_PM_GENERIC_DOMAINS
+	struct pm_domain_data *domain_data;
+#endif
+};
+
 struct dev_pm_info {
 	pm_message_t		power_state;
 	unsigned int		can_wakeup:1;
@@ -464,10 +480,12 @@ struct dev_pm_info {
 	unsigned long		suspended_jiffies;
 	unsigned long		accounting_timestamp;
 #endif
-	void			*subsys_data;  /* Owned by the subsystem. */
+	struct pm_subsys_data	*subsys_data;  /* Owned by the subsystem. */
 };
 
 extern void update_pm_runtime_accounting(struct device *dev);
+extern int dev_pm_get_subsys_data(struct device *dev);
+extern int dev_pm_put_subsys_data(struct device *dev);
 
 /*
  * Power domains provide callbacks that are executed during system suspend,
diff --git a/include/linux/pm_clock.h b/include/linux/pm_clock.h
new file mode 100644
index 00000000000..8348866e7b0
--- /dev/null
+++ b/include/linux/pm_clock.h
@@ -0,0 +1,71 @@
+/*
+ * pm_clock.h - Definitions and headers related to device clocks.
+ *
+ * Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Renesas Electronics Corp.
+ *
+ * This file is released under the GPLv2.
+ */
+
+#ifndef _LINUX_PM_CLOCK_H
+#define _LINUX_PM_CLOCK_H
+
+#include <linux/device.h>
+#include <linux/notifier.h>
+
+struct pm_clk_notifier_block {
+	struct notifier_block nb;
+	struct dev_pm_domain *pm_domain;
+	char *con_ids[];
+};
+
+#ifdef CONFIG_PM_CLK
+static inline bool pm_clk_no_clocks(struct device *dev)
+{
+	return dev && dev->power.subsys_data
+		&& list_empty(&dev->power.subsys_data->clock_list);
+}
+
+extern void pm_clk_init(struct device *dev);
+extern int pm_clk_create(struct device *dev);
+extern void pm_clk_destroy(struct device *dev);
+extern int pm_clk_add(struct device *dev, const char *con_id);
+extern void pm_clk_remove(struct device *dev, const char *con_id);
+extern int pm_clk_suspend(struct device *dev);
+extern int pm_clk_resume(struct device *dev);
+#else
+static inline bool pm_clk_no_clocks(struct device *dev)
+{
+	return true;
+}
+static inline void pm_clk_init(struct device *dev)
+{
+}
+static inline int pm_clk_create(struct device *dev)
+{
+	return -EINVAL;
+}
+static inline void pm_clk_destroy(struct device *dev)
+{
+}
+static inline int pm_clk_add(struct device *dev, const char *con_id)
+{
+	return -EINVAL;
+}
+static inline void pm_clk_remove(struct device *dev, const char *con_id)
+{
+}
+#define pm_clk_suspend	NULL
+#define pm_clk_resume	NULL
+#endif
+
+#ifdef CONFIG_HAVE_CLK
+extern void pm_clk_add_notifier(struct bus_type *bus,
+					struct pm_clk_notifier_block *clknb);
+#else
+static inline void pm_clk_add_notifier(struct bus_type *bus,
+					struct pm_clk_notifier_block *clknb)
+{
+}
+#endif
+
+#endif
diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
index f9ec1736a11..65633e5a2bc 100644
--- a/include/linux/pm_domain.h
+++ b/include/linux/pm_domain.h
@@ -13,6 +13,7 @@
 
 enum gpd_status {
 	GPD_STATE_ACTIVE = 0,	/* PM domain is active */
+	GPD_STATE_WAIT_MASTER,	/* PM domain's master is being waited for */
 	GPD_STATE_BUSY,		/* Something is happening to the PM domain */
 	GPD_STATE_REPEAT,	/* Power off in progress, to be repeated */
 	GPD_STATE_POWER_OFF,	/* PM domain is off */
@@ -25,15 +26,14 @@ 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 */
+	struct list_head master_links;	/* Links with PM domain as a master */
+	struct list_head slave_links;	/* Links with PM domain as a slave */
 	struct list_head dev_list;	/* List of devices */
 	struct mutex lock;
 	struct dev_power_governor *gov;
 	struct work_struct power_off_work;
 	unsigned int in_progress;	/* Number of devices being suspended now */
-	unsigned int sd_count;	/* Number of subdomains with power "on" */
+	atomic_t sd_count;	/* Number of subdomains with power "on" */
 	enum gpd_status status;	/* Current state of the domain */
 	wait_queue_head_t status_wait_queue;
 	struct task_struct *poweroff_task;	/* Powering off task */
@@ -42,6 +42,7 @@ struct generic_pm_domain {
 	unsigned int suspended_count;	/* System suspend device counter */
 	unsigned int prepared_count;	/* Suspend counter of prepared devices */
 	bool suspend_power_off;	/* Power status before system suspend */
+	bool dev_irq_safe;	/* Device callbacks are IRQ-safe */
 	int (*power_off)(struct generic_pm_domain *domain);
 	int (*power_on)(struct generic_pm_domain *domain);
 	int (*start_device)(struct device *dev);
@@ -54,12 +55,23 @@ static inline struct generic_pm_domain *pd_to_genpd(struct dev_pm_domain *pd)
 	return container_of(pd, struct generic_pm_domain, domain);
 }
 
-struct dev_list_entry {
-	struct list_head node;
-	struct device *dev;
+struct gpd_link {
+	struct generic_pm_domain *master;
+	struct list_head master_node;
+	struct generic_pm_domain *slave;
+	struct list_head slave_node;
+};
+
+struct generic_pm_domain_data {
+	struct pm_domain_data base;
 	bool need_restore;
 };
 
+static inline struct generic_pm_domain_data *to_gpd_data(struct pm_domain_data *pdd)
+{
+	return container_of(pdd, struct generic_pm_domain_data, base);
+}
+
 #ifdef CONFIG_PM_GENERIC_DOMAINS
 extern int pm_genpd_add_device(struct generic_pm_domain *genpd,
 			       struct device *dev);
diff --git a/include/linux/pm_runtime.h b/include/linux/pm_runtime.h
index daac05d751b..70b284024d9 100644
--- a/include/linux/pm_runtime.h
+++ b/include/linux/pm_runtime.h
@@ -251,46 +251,4 @@ static inline void pm_runtime_dont_use_autosuspend(struct device *dev)
 	__pm_runtime_use_autosuspend(dev, false);
 }
 
-struct pm_clk_notifier_block {
-	struct notifier_block nb;
-	struct dev_pm_domain *pm_domain;
-	char *con_ids[];
-};
-
-#ifdef CONFIG_PM_CLK
-extern int pm_clk_init(struct device *dev);
-extern void pm_clk_destroy(struct device *dev);
-extern int pm_clk_add(struct device *dev, const char *con_id);
-extern void pm_clk_remove(struct device *dev, const char *con_id);
-extern int pm_clk_suspend(struct device *dev);
-extern int pm_clk_resume(struct device *dev);
-#else
-static inline int pm_clk_init(struct device *dev)
-{
-	return -EINVAL;
-}
-static inline void pm_clk_destroy(struct device *dev)
-{
-}
-static inline int pm_clk_add(struct device *dev, const char *con_id)
-{
-	return -EINVAL;
-}
-static inline void pm_clk_remove(struct device *dev, const char *con_id)
-{
-}
-#define pm_clk_suspend	NULL
-#define pm_clk_resume	NULL
-#endif
-
-#ifdef CONFIG_HAVE_CLK
-extern void pm_clk_add_notifier(struct bus_type *bus,
-					struct pm_clk_notifier_block *clknb);
-#else
-static inline void pm_clk_add_notifier(struct bus_type *bus,
-					struct pm_clk_notifier_block *clknb)
-{
-}
-#endif
-
 #endif