[v2,4/6] PM: runtime: Add DEFINE_RUNTIME_DEV_PM_OPS() macro

Commit Message

Paul Cercueil Jan. 5, 2022, 6:29 p.m. UTC

A lot of drivers create a dev_pm_ops struct with the system sleep
suspend/resume callbacks set to pm_runtime_force_suspend() and
pm_runtime_force_resume().

These drivers can now use the DEFINE_RUNTIME_DEV_PM_OPS() macro, which
will use pm_runtime_force_{suspend,resume}() as the system sleep
callbacks, while having the same dead code removal characteristic that
is already provided by DEFINE_SIMPLE_DEV_PM_OPS().

Signed-off-by: Paul Cercueil <[e-mail]>
Acked-by: Jonathan Cameron <[e-mail]>
---

Notes:
    v2: No change

 include/linux/pm.h         |  3 +++
 include/linux/pm_runtime.h | 14 ++++++++++++++
 2 files changed, 17 insertions(+)

Patch

diff --git a/include/linux/pm.h b/include/linux/pm.h
index b82f40e701ab..43fa4f828a62 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -410,6 +410,9 @@  const struct dev_pm_ops __maybe_unused name = { \
  * suspend and "early" resume callback pointers, .suspend_late() and
  * .resume_early(), to the same routines as .runtime_suspend() and
  * .runtime_resume(), respectively (and analogously for hibernation).
+ *
+ * Deprecated. You most likely don't want this macro. Use
+ * DEFINE_RUNTIME_DEV_PM_OPS() instead.
  */
 #define UNIVERSAL_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn) \
 const struct dev_pm_ops __maybe_unused name = { \
diff --git a/include/linux/pm_runtime.h b/include/linux/pm_runtime.h
index 016de5776b6d..4af454d29281 100644
--- a/include/linux/pm_runtime.h
+++ b/include/linux/pm_runtime.h
@@ -22,6 +22,20 @@ 
 					    usage_count */
 #define RPM_AUTO		0x08	/* Use autosuspend_delay */
 
+/*
+ * Use this for defining a set of PM operations to be used in all situations
+ * (system suspend, hibernation or runtime PM).
+ *
+ * Note that the behaviour differs from the deprecated UNIVERSAL_DEV_PM_OPS()
+ * macro, which uses the provided callbacks for both runtime PM and system
+ * sleep, while DEFINE_RUNTIME_DEV_PM_OPS() uses pm_runtime_force_suspend()
+ * and pm_runtime_force_resume() for its system sleep callbacks.
+ */
+#define DEFINE_RUNTIME_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn) \
+	_DEFINE_DEV_PM_OPS(name, pm_runtime_force_suspend, \
+			   pm_runtime_force_resume, suspend_fn, \
+			   resume_fn, idle_fn)
+
 #ifdef CONFIG_PM
 extern struct workqueue_struct *pm_wq;