1 files changed, 195 insertions, 10 deletions

diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 431488914982..43fd08e50ae9 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -2359,7 +2359,7 @@ exit:
         return 0;
 }
 
-static int pm_genpd_summary_show(struct seq_file *s, void *data)
+static int genpd_summary_show(struct seq_file *s, void *data)
 {
         struct generic_pm_domain *genpd;
         int ret = 0;
@@ -2382,21 +2382,187 @@ static int pm_genpd_summary_show(struct seq_file *s, void *data)
         return ret;
 }
 
-static int pm_genpd_summary_open(struct inode *inode, struct file *file)
+static int genpd_status_show(struct seq_file *s, void *data)
 {
-        return single_open(file, pm_genpd_summary_show, NULL);
+        static const char * const status_lookup[] = {
+                [GPD_STATE_ACTIVE] = "on",
+                [GPD_STATE_POWER_OFF] = "off"
+        };
+
+        struct generic_pm_domain *genpd = s->private;
+        int ret = 0;
+
+        ret = genpd_lock_interruptible(genpd);
+        if (ret)
+                return -ERESTARTSYS;
+
+        if (WARN_ON_ONCE(genpd->status >= ARRAY_SIZE(status_lookup)))
+                goto exit;
+
+        if (genpd->status == GPD_STATE_POWER_OFF)
+                seq_printf(s, "%s-%u\n", status_lookup[genpd->status],
+                        genpd->state_idx);
+        else
+                seq_printf(s, "%s\n", status_lookup[genpd->status]);
+exit:
+        genpd_unlock(genpd);
+        return ret;
 }
 
-static const struct file_operations pm_genpd_summary_fops = {
-        .open = pm_genpd_summary_open,
-        .read = seq_read,
-        .llseek = seq_lseek,
-        .release = single_release,
-};
+static int genpd_sub_domains_show(struct seq_file *s, void *data)
+{
+        struct generic_pm_domain *genpd = s->private;
+        struct gpd_link *link;
+        int ret = 0;
+
+        ret = genpd_lock_interruptible(genpd);
+        if (ret)
+                return -ERESTARTSYS;
+
+        list_for_each_entry(link, &genpd->master_links, master_node)
+                seq_printf(s, "%s\n", link->slave->name);
+
+        genpd_unlock(genpd);
+        return ret;
+}
+
+static int genpd_idle_states_show(struct seq_file *s, void *data)
+{
+        struct generic_pm_domain *genpd = s->private;
+        unsigned int i;
+        int ret = 0;
+
+        ret = genpd_lock_interruptible(genpd);
+        if (ret)
+                return -ERESTARTSYS;
+
+        seq_puts(s, "State          Time Spent(ms)\n");
+
+        for (i = 0; i < genpd->state_count; i++) {
+                ktime_t delta = 0;
+                s64 msecs;
+
+                if ((genpd->status == GPD_STATE_POWER_OFF) &&
+                                (genpd->state_idx == i))
+                        delta = ktime_sub(ktime_get(), genpd->accounting_time);
+
+                msecs = ktime_to_ms(
+                        ktime_add(genpd->states[i].idle_time, delta));
+                seq_printf(s, "S%-13i %lld\n", i, msecs);
+        }
+
+        genpd_unlock(genpd);
+        return ret;
+}
+
+static int genpd_active_time_show(struct seq_file *s, void *data)
+{
+        struct generic_pm_domain *genpd = s->private;
+        ktime_t delta = 0;
+        int ret = 0;
+
+        ret = genpd_lock_interruptible(genpd);
+        if (ret)
+                return -ERESTARTSYS;
+
+        if (genpd->status == GPD_STATE_ACTIVE)
+                delta = ktime_sub(ktime_get(), genpd->accounting_time);
+
+        seq_printf(s, "%lld ms\n", ktime_to_ms(
+                                ktime_add(genpd->on_time, delta)));
+
+        genpd_unlock(genpd);
+        return ret;
+}
+
+static int genpd_total_idle_time_show(struct seq_file *s, void *data)
+{
+        struct generic_pm_domain *genpd = s->private;
+        ktime_t delta = 0, total = 0;
+        unsigned int i;
+        int ret = 0;
+
+        ret = genpd_lock_interruptible(genpd);
+        if (ret)
+                return -ERESTARTSYS;
+
+        for (i = 0; i < genpd->state_count; i++) {
+
+                if ((genpd->status == GPD_STATE_POWER_OFF) &&
+                                (genpd->state_idx == i))
+                        delta = ktime_sub(ktime_get(), genpd->accounting_time);
+
+                total = ktime_add(total, genpd->states[i].idle_time);
+        }
+        total = ktime_add(total, delta);
+
+        seq_printf(s, "%lld ms\n", ktime_to_ms(total));
+
+        genpd_unlock(genpd);
+        return ret;
+}
+
+
+static int genpd_devices_show(struct seq_file *s, void *data)
+{
+        struct generic_pm_domain *genpd = s->private;
+        struct pm_domain_data *pm_data;
+        const char *kobj_path;
+        int ret = 0;
+
+        ret = genpd_lock_interruptible(genpd);
+        if (ret)
+                return -ERESTARTSYS;
+
+        list_for_each_entry(pm_data, &genpd->dev_list, list_node) {
+                kobj_path = kobject_get_path(&pm_data->dev->kobj,
+                                genpd_is_irq_safe(genpd) ?
+                                GFP_ATOMIC : GFP_KERNEL);
+                if (kobj_path == NULL)
+                        continue;
+
+                seq_printf(s, "%s\n", kobj_path);
+                kfree(kobj_path);
+        }
+
+        genpd_unlock(genpd);
+        return ret;
+}
+
+#define define_genpd_open_function(name) \
+static int genpd_##name##_open(struct inode *inode, struct file *file) \
+{ \
+        return single_open(file, genpd_##name##_show, inode->i_private); \
+}
+
+define_genpd_open_function(summary);
+define_genpd_open_function(status);
+define_genpd_open_function(sub_domains);
+define_genpd_open_function(idle_states);
+define_genpd_open_function(active_time);
+define_genpd_open_function(total_idle_time);
+define_genpd_open_function(devices);
+
+#define define_genpd_debugfs_fops(name) \
+static const struct file_operations genpd_##name##_fops = { \
+        .open = genpd_##name##_open, \
+        .read = seq_read, \
+        .llseek = seq_lseek, \
+        .release = single_release, \
+}
+
+define_genpd_debugfs_fops(summary);
+define_genpd_debugfs_fops(status);
+define_genpd_debugfs_fops(sub_domains);
+define_genpd_debugfs_fops(idle_states);
+define_genpd_debugfs_fops(active_time);
+define_genpd_debugfs_fops(total_idle_time);
+define_genpd_debugfs_fops(devices);
 
 static int __init pm_genpd_debug_init(void)
 {
         struct dentry *d;
+        struct generic_pm_domain *genpd;
 
         pm_genpd_debugfs_dir = debugfs_create_dir("pm_genpd", NULL);
 
@@ -2404,10 +2570,29 @@ static int __init pm_genpd_debug_init(void)
                 return -ENOMEM;
 
         d = debugfs_create_file("pm_genpd_summary", S_IRUGO,
-                        pm_genpd_debugfs_dir, NULL, &pm_genpd_summary_fops);
+                        pm_genpd_debugfs_dir, NULL, &genpd_summary_fops);
         if (!d)
                 return -ENOMEM;
 
+        list_for_each_entry(genpd, &gpd_list, gpd_list_node) {
+                d = debugfs_create_dir(genpd->name, pm_genpd_debugfs_dir);
+                if (!d)
+                        return -ENOMEM;
+
+                debugfs_create_file("current_state", 0444,
+                                d, genpd, &genpd_status_fops);
+                debugfs_create_file("sub_domains", 0444,
+                                d, genpd, &genpd_sub_domains_fops);
+                debugfs_create_file("idle_states", 0444,
+                                d, genpd, &genpd_idle_states_fops);
+                debugfs_create_file("active_time", 0444,
+                                d, genpd, &genpd_active_time_fops);
+                debugfs_create_file("total_idle_time", 0444,
+                                d, genpd, &genpd_total_idle_time_fops);
+                debugfs_create_file("devices", 0444,
+                                d, genpd, &genpd_devices_fops);
+        }
+
         return 0;
 }
 late_initcall(pm_genpd_debug_init);