linux-kernel - [PATCH] pm: runtime: Add new devm functions

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Message-ID: <20250114222851.1023194-1-csokas.bence@prolan.hu>
Date: Tue, 14 Jan 2025 23:28:49 +0100
From: Bence Csókás <csokas.bence@...lan.hu>
To: <linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: Bence Csókás <csokas.bence@...lan.hu>, "Rafael J.
 Wysocki" <rafael@...nel.org>, Len Brown <len.brown@...el.com>, Pavel Machek
	<pavel@....cz>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH] pm: runtime: Add new devm functions

Add `devm_pm_runtime_set_active()` and
`devm_pm_runtime_get_noresume()` for
simplifying common use cases in drivers.

Signed-off-by: Bence Csókás <csokas.bence@...lan.hu>
---
 drivers/base/power/runtime.c | 36 ++++++++++++++++++++++++++++++++++++
 include/linux/pm_runtime.h   |  4 ++++
 2 files changed, 40 insertions(+)

diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index 2ee45841486b..f0a6c64bec19 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -1545,6 +1545,24 @@ void pm_runtime_enable(struct device *dev)
 }
 EXPORT_SYMBOL_GPL(pm_runtime_enable);
 
+static void pm_runtime_set_suspended_action(void *data)
+{
+	pm_runtime_set_suspended(data);
+}
+
+/**
+ * devm_pm_runtime_set_active - devres-enabled version of pm_runtime_set_active.
+ *
+ * @dev: Device to handle.
+ */
+int devm_pm_runtime_set_active(struct device *dev)
+{
+	pm_runtime_set_active(dev);
+
+	return devm_add_action_or_reset(dev, pm_runtime_set_suspended_action, dev);
+}
+EXPORT_SYMBOL_GPL(devm_pm_runtime_set_active);
+
 static void pm_runtime_disable_action(void *data)
 {
 	pm_runtime_dont_use_autosuspend(data);
@@ -1567,6 +1585,24 @@ int devm_pm_runtime_enable(struct device *dev)
 }
 EXPORT_SYMBOL_GPL(devm_pm_runtime_enable);
 
+static void pm_runtime_put_noidle_action(void *data)
+{
+	pm_runtime_put_noidle(data);
+}
+
+/**
+ * devm_pm_runtime_get_noresume - devres-enabled version of pm_runtime_get_noresume.
+ *
+ * @dev: Device to handle.
+ */
+int devm_pm_runtime_get_noresume(struct device *dev)
+{
+	pm_runtime_get_noresume(dev);
+
+	return devm_add_action_or_reset(dev, pm_runtime_put_noidle_action, dev);
+}
+EXPORT_SYMBOL_GPL(devm_pm_runtime_get_noresume);
+
 /**
  * pm_runtime_forbid - Block runtime PM of a device.
  * @dev: Device to handle.
diff --git a/include/linux/pm_runtime.h b/include/linux/pm_runtime.h
index d39dc863f612..3a0e03534621 100644
--- a/include/linux/pm_runtime.h
+++ b/include/linux/pm_runtime.h
@@ -93,7 +93,9 @@ extern void pm_runtime_new_link(struct device *dev);
 extern void pm_runtime_drop_link(struct device_link *link);
 extern void pm_runtime_release_supplier(struct device_link *link);
 
+extern int devm_pm_runtime_set_active(struct device *dev);
 extern int devm_pm_runtime_enable(struct device *dev);
+extern int devm_pm_runtime_get_noresume(struct device *dev);
 
 /**
  * pm_suspend_ignore_children - Set runtime PM behavior regarding children.
@@ -276,7 +278,9 @@ static inline void __pm_runtime_disable(struct device *dev, bool c) {}
 static inline void pm_runtime_allow(struct device *dev) {}
 static inline void pm_runtime_forbid(struct device *dev) {}
 
+static inline int devm_pm_runtime_set_active(struct device *dev) { return 0; }
 static inline int devm_pm_runtime_enable(struct device *dev) { return 0; }
+static inline int devm_pm_runtime_get_noresume(struct device *dev) { return 0; }
 
 static inline void pm_suspend_ignore_children(struct device *dev, bool enable) {}
 static inline void pm_runtime_get_noresume(struct device *dev) {}
-- 
2.48.0