v4.19.13 snapshot.
diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
new file mode 100644
index 0000000..776c546
--- /dev/null
+++ b/include/linux/pm_domain.h
@@ -0,0 +1,336 @@
+/*
+ * pm_domain.h - Definitions and headers related to device power domains.
+ *
+ * Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Renesas Electronics Corp.
+ *
+ * This file is released under the GPLv2.
+ */
+
+#ifndef _LINUX_PM_DOMAIN_H
+#define _LINUX_PM_DOMAIN_H
+
+#include <linux/device.h>
+#include <linux/mutex.h>
+#include <linux/pm.h>
+#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/notifier.h>
+#include <linux/spinlock.h>
+
+/* Defines used for the flags field in the struct generic_pm_domain */
+#define GENPD_FLAG_PM_CLK (1U << 0) /* PM domain uses PM clk */
+#define GENPD_FLAG_IRQ_SAFE (1U << 1) /* PM domain operates in atomic */
+#define GENPD_FLAG_ALWAYS_ON (1U << 2) /* PM domain is always powered on */
+#define GENPD_FLAG_ACTIVE_WAKEUP (1U << 3) /* Keep devices active if wakeup */
+
+enum gpd_status {
+ GPD_STATE_ACTIVE = 0, /* PM domain is active */
+ GPD_STATE_POWER_OFF, /* PM domain is off */
+};
+
+struct dev_power_governor {
+ bool (*power_down_ok)(struct dev_pm_domain *domain);
+ bool (*suspend_ok)(struct device *dev);
+};
+
+struct gpd_dev_ops {
+ int (*start)(struct device *dev);
+ int (*stop)(struct device *dev);
+};
+
+struct genpd_power_state {
+ s64 power_off_latency_ns;
+ s64 power_on_latency_ns;
+ s64 residency_ns;
+ struct fwnode_handle *fwnode;
+ ktime_t idle_time;
+};
+
+struct genpd_lock_ops;
+struct dev_pm_opp;
+
+struct generic_pm_domain {
+ struct device dev;
+ struct dev_pm_domain domain; /* PM domain operations */
+ struct list_head gpd_list_node; /* Node in the global PM domains list */
+ 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 dev_power_governor *gov;
+ struct work_struct power_off_work;
+ struct fwnode_handle *provider; /* Identity of the domain provider */
+ bool has_provider;
+ const char *name;
+ atomic_t sd_count; /* Number of subdomains with power "on" */
+ enum gpd_status status; /* Current state of the domain */
+ unsigned int device_count; /* Number of devices */
+ unsigned int suspended_count; /* System suspend device counter */
+ unsigned int prepared_count; /* Suspend counter of prepared devices */
+ unsigned int performance_state; /* Aggregated max performance state */
+ int (*power_off)(struct generic_pm_domain *domain);
+ int (*power_on)(struct generic_pm_domain *domain);
+ unsigned int (*opp_to_performance_state)(struct generic_pm_domain *genpd,
+ struct dev_pm_opp *opp);
+ int (*set_performance_state)(struct generic_pm_domain *genpd,
+ unsigned int state);
+ struct gpd_dev_ops dev_ops;
+ s64 max_off_time_ns; /* Maximum allowed "suspended" time. */
+ bool max_off_time_changed;
+ bool cached_power_down_ok;
+ int (*attach_dev)(struct generic_pm_domain *domain,
+ struct device *dev);
+ void (*detach_dev)(struct generic_pm_domain *domain,
+ struct device *dev);
+ unsigned int flags; /* Bit field of configs for genpd */
+ struct genpd_power_state *states;
+ unsigned int state_count; /* number of states */
+ unsigned int state_idx; /* state that genpd will go to when off */
+ void *free; /* Free the state that was allocated for default */
+ ktime_t on_time;
+ ktime_t accounting_time;
+ const struct genpd_lock_ops *lock_ops;
+ union {
+ struct mutex mlock;
+ struct {
+ spinlock_t slock;
+ unsigned long lock_flags;
+ };
+ };
+
+};
+
+static inline struct generic_pm_domain *pd_to_genpd(struct dev_pm_domain *pd)
+{
+ return container_of(pd, struct generic_pm_domain, domain);
+}
+
+struct gpd_link {
+ struct generic_pm_domain *master;
+ struct list_head master_node;
+ struct generic_pm_domain *slave;
+ struct list_head slave_node;
+};
+
+struct gpd_timing_data {
+ s64 suspend_latency_ns;
+ s64 resume_latency_ns;
+ s64 effective_constraint_ns;
+ bool constraint_changed;
+ bool cached_suspend_ok;
+};
+
+struct pm_domain_data {
+ struct list_head list_node;
+ struct device *dev;
+};
+
+struct generic_pm_domain_data {
+ struct pm_domain_data base;
+ struct gpd_timing_data td;
+ struct notifier_block nb;
+ unsigned int performance_state;
+ void *data;
+};
+
+#ifdef CONFIG_PM_GENERIC_DOMAINS
+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);
+}
+
+static inline struct generic_pm_domain_data *dev_gpd_data(struct device *dev)
+{
+ return to_gpd_data(dev->power.subsys_data->domain_data);
+}
+
+int pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev);
+int pm_genpd_remove_device(struct device *dev);
+int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
+ struct generic_pm_domain *new_subdomain);
+int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
+ struct generic_pm_domain *target);
+int pm_genpd_init(struct generic_pm_domain *genpd,
+ struct dev_power_governor *gov, bool is_off);
+int pm_genpd_remove(struct generic_pm_domain *genpd);
+int dev_pm_genpd_set_performance_state(struct device *dev, unsigned int state);
+
+extern struct dev_power_governor simple_qos_governor;
+extern struct dev_power_governor pm_domain_always_on_gov;
+#else
+
+static inline struct generic_pm_domain_data *dev_gpd_data(struct device *dev)
+{
+ return ERR_PTR(-ENOSYS);
+}
+static inline int pm_genpd_add_device(struct generic_pm_domain *genpd,
+ struct device *dev)
+{
+ return -ENOSYS;
+}
+static inline int pm_genpd_remove_device(struct device *dev)
+{
+ return -ENOSYS;
+}
+static inline int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
+ struct generic_pm_domain *new_sd)
+{
+ return -ENOSYS;
+}
+static inline int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
+ struct generic_pm_domain *target)
+{
+ return -ENOSYS;
+}
+static inline int pm_genpd_init(struct generic_pm_domain *genpd,
+ struct dev_power_governor *gov, bool is_off)
+{
+ return -ENOSYS;
+}
+static inline int pm_genpd_remove(struct generic_pm_domain *genpd)
+{
+ return -ENOTSUPP;
+}
+
+static inline int dev_pm_genpd_set_performance_state(struct device *dev,
+ unsigned int state)
+{
+ return -ENOTSUPP;
+}
+
+#define simple_qos_governor (*(struct dev_power_governor *)(NULL))
+#define pm_domain_always_on_gov (*(struct dev_power_governor *)(NULL))
+#endif
+
+#ifdef CONFIG_PM_GENERIC_DOMAINS_SLEEP
+void pm_genpd_syscore_poweroff(struct device *dev);
+void pm_genpd_syscore_poweron(struct device *dev);
+#else
+static inline void pm_genpd_syscore_poweroff(struct device *dev) {}
+static inline void pm_genpd_syscore_poweron(struct device *dev) {}
+#endif
+
+/* OF PM domain providers */
+struct of_device_id;
+
+typedef struct generic_pm_domain *(*genpd_xlate_t)(struct of_phandle_args *args,
+ void *data);
+
+struct genpd_onecell_data {
+ struct generic_pm_domain **domains;
+ unsigned int num_domains;
+ genpd_xlate_t xlate;
+};
+
+#ifdef CONFIG_PM_GENERIC_DOMAINS_OF
+int of_genpd_add_provider_simple(struct device_node *np,
+ struct generic_pm_domain *genpd);
+int of_genpd_add_provider_onecell(struct device_node *np,
+ struct genpd_onecell_data *data);
+void of_genpd_del_provider(struct device_node *np);
+int of_genpd_add_device(struct of_phandle_args *args, struct device *dev);
+int of_genpd_add_subdomain(struct of_phandle_args *parent,
+ struct of_phandle_args *new_subdomain);
+struct generic_pm_domain *of_genpd_remove_last(struct device_node *np);
+int of_genpd_parse_idle_states(struct device_node *dn,
+ struct genpd_power_state **states, int *n);
+unsigned int of_genpd_opp_to_performance_state(struct device *dev,
+ struct device_node *np);
+
+int genpd_dev_pm_attach(struct device *dev);
+struct device *genpd_dev_pm_attach_by_id(struct device *dev,
+ unsigned int index);
+struct device *genpd_dev_pm_attach_by_name(struct device *dev,
+ char *name);
+#else /* !CONFIG_PM_GENERIC_DOMAINS_OF */
+static inline int of_genpd_add_provider_simple(struct device_node *np,
+ struct generic_pm_domain *genpd)
+{
+ return -ENOTSUPP;
+}
+
+static inline int of_genpd_add_provider_onecell(struct device_node *np,
+ struct genpd_onecell_data *data)
+{
+ return -ENOTSUPP;
+}
+
+static inline void of_genpd_del_provider(struct device_node *np) {}
+
+static inline int of_genpd_add_device(struct of_phandle_args *args,
+ struct device *dev)
+{
+ return -ENODEV;
+}
+
+static inline int of_genpd_add_subdomain(struct of_phandle_args *parent,
+ struct of_phandle_args *new_subdomain)
+{
+ return -ENODEV;
+}
+
+static inline int of_genpd_parse_idle_states(struct device_node *dn,
+ struct genpd_power_state **states, int *n)
+{
+ return -ENODEV;
+}
+
+static inline unsigned int
+of_genpd_opp_to_performance_state(struct device *dev,
+ struct device_node *np)
+{
+ return 0;
+}
+
+static inline int genpd_dev_pm_attach(struct device *dev)
+{
+ return 0;
+}
+
+static inline struct device *genpd_dev_pm_attach_by_id(struct device *dev,
+ unsigned int index)
+{
+ return NULL;
+}
+
+static inline struct device *genpd_dev_pm_attach_by_name(struct device *dev,
+ char *name)
+{
+ return NULL;
+}
+
+static inline
+struct generic_pm_domain *of_genpd_remove_last(struct device_node *np)
+{
+ return ERR_PTR(-ENOTSUPP);
+}
+#endif /* CONFIG_PM_GENERIC_DOMAINS_OF */
+
+#ifdef CONFIG_PM
+int dev_pm_domain_attach(struct device *dev, bool power_on);
+struct device *dev_pm_domain_attach_by_id(struct device *dev,
+ unsigned int index);
+struct device *dev_pm_domain_attach_by_name(struct device *dev,
+ char *name);
+void dev_pm_domain_detach(struct device *dev, bool power_off);
+void dev_pm_domain_set(struct device *dev, struct dev_pm_domain *pd);
+#else
+static inline int dev_pm_domain_attach(struct device *dev, bool power_on)
+{
+ return 0;
+}
+static inline struct device *dev_pm_domain_attach_by_id(struct device *dev,
+ unsigned int index)
+{
+ return NULL;
+}
+static inline struct device *dev_pm_domain_attach_by_name(struct device *dev,
+ char *name)
+{
+ return NULL;
+}
+static inline void dev_pm_domain_detach(struct device *dev, bool power_off) {}
+static inline void dev_pm_domain_set(struct device *dev,
+ struct dev_pm_domain *pd) {}
+#endif
+
+#endif /* _LINUX_PM_DOMAIN_H */