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Date: Thu, 3 Dec 2020 15:35:46 -0800
From: Thierry Strudel <tstrudel@...gle.com>
To: "Rafael J. Wysocki" <rjw@...ysocki.net>,
Kevin Hilman <khilman@...nel.org>,
Ulf Hansson <ulf.hansson@...aro.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
Thierry Strudel <tstrudel@...gle.com>
Subject: [PATCH] PM: domains: create debugfs nodes when adding power domains
debugfs nodes were created in genpd_debug_init alled in late_initcall
preventing power domains registered though loadable modules to have
a debugfs entry.
Create/remove debugfs nodes when the power domain is added/removed
to/from the internal gpd_list.
Signed-off-by: Thierry Strudel <tstrudel@...gle.com>
---
drivers/base/power/domain.c | 61 ++++++++++++++++++++++++-------------
1 file changed, 39 insertions(+), 22 deletions(-)
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 743268996336..3f168ec93762 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -1880,6 +1880,8 @@ static void genpd_lock_init(struct generic_pm_domain *genpd)
}
}
+static void genpd_debug_add(struct generic_pm_domain *genpd);
+
/**
* pm_genpd_init - Initialize a generic I/O PM domain object.
* @genpd: PM domain object to initialize.
@@ -1954,12 +1956,15 @@ int pm_genpd_init(struct generic_pm_domain *genpd,
mutex_lock(&gpd_list_lock);
list_add(&genpd->gpd_list_node, &gpd_list);
+ genpd_debug_add(genpd);
mutex_unlock(&gpd_list_lock);
return 0;
}
EXPORT_SYMBOL_GPL(pm_genpd_init);
+static void genpd_debug_remove(struct generic_pm_domain *genpd);
+
static int genpd_remove(struct generic_pm_domain *genpd)
{
struct gpd_link *l, *link;
@@ -1987,6 +1992,7 @@ static int genpd_remove(struct generic_pm_domain *genpd)
kfree(link);
}
+ genpd_debug_remove(genpd);
list_del(&genpd->gpd_list_node);
genpd_unlock(genpd);
cancel_work_sync(&genpd->power_off_work);
@@ -3177,36 +3183,44 @@ DEFINE_SHOW_ATTRIBUTE(total_idle_time);
DEFINE_SHOW_ATTRIBUTE(devices);
DEFINE_SHOW_ATTRIBUTE(perf_state);
-static int __init genpd_debug_init(void)
+static void genpd_debug_add(struct generic_pm_domain *genpd)
{
struct dentry *d;
- struct generic_pm_domain *genpd;
+ d = debugfs_create_dir(genpd->name, genpd_debugfs_dir);
+
+ debugfs_create_file("current_state", 0444,
+ d, genpd, &status_fops);
+ debugfs_create_file("sub_domains", 0444,
+ d, genpd, &sub_domains_fops);
+ debugfs_create_file("idle_states", 0444,
+ d, genpd, &idle_states_fops);
+ debugfs_create_file("active_time", 0444,
+ d, genpd, &active_time_fops);
+ debugfs_create_file("total_idle_time", 0444,
+ d, genpd, &total_idle_time_fops);
+ debugfs_create_file("devices", 0444,
+ d, genpd, &devices_fops);
+ if (genpd->set_performance_state)
+ debugfs_create_file("perf_state", 0444,
+ d, genpd, &perf_state_fops);
+}
+
+static void genpd_debug_remove(struct generic_pm_domain *genpd)
+{
+ struct dentry *d;
+
+ d = debugfs_lookup(genpd->name, genpd_debugfs_dir);
+ debugfs_remove(d);
+}
+
+static int __init genpd_debug_init(void)
+{
genpd_debugfs_dir = debugfs_create_dir("pm_genpd", NULL);
debugfs_create_file("pm_genpd_summary", S_IRUGO, genpd_debugfs_dir,
NULL, &summary_fops);
- list_for_each_entry(genpd, &gpd_list, gpd_list_node) {
- d = debugfs_create_dir(genpd->name, genpd_debugfs_dir);
-
- debugfs_create_file("current_state", 0444,
- d, genpd, &status_fops);
- debugfs_create_file("sub_domains", 0444,
- d, genpd, &sub_domains_fops);
- debugfs_create_file("idle_states", 0444,
- d, genpd, &idle_states_fops);
- debugfs_create_file("active_time", 0444,
- d, genpd, &active_time_fops);
- debugfs_create_file("total_idle_time", 0444,
- d, genpd, &total_idle_time_fops);
- debugfs_create_file("devices", 0444,
- d, genpd, &devices_fops);
- if (genpd->set_performance_state)
- debugfs_create_file("perf_state", 0444,
- d, genpd, &perf_state_fops);
- }
-
return 0;
}
late_initcall(genpd_debug_init);
@@ -3216,4 +3230,7 @@ static void __exit genpd_debug_exit(void)
debugfs_remove_recursive(genpd_debugfs_dir);
}
__exitcall(genpd_debug_exit);
+#else
+static void genpd_debug_add(struct generic_pm_domain *genpd) {}
+static void genpd_debug_remove(struct generic_pm_domain *genpd) {}
#endif /* CONFIG_DEBUG_FS */
--
2.29.2.576.ga3fc446d84-goog
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