PM: Add facility for advanced testing of async suspend/resume
Add configuration switch CONFIG_PM_ADVANCED_DEBUG for compiling in
extra PM debugging/testing code allowing one to access some
PM-related attributes of devices from the user space via sysfs.
If CONFIG_PM_ADVANCED_DEBUG is set, add sysfs attribute power/async
for every device allowing the user space to access the device's
power.async_suspend flag and modify it, if desired.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
index 4c9cffc..5c36ea9 100644
--- a/kernel/power/Kconfig
+++ b/kernel/power/Kconfig
@@ -27,6 +27,15 @@
code. This is helpful when debugging and reporting PM bugs, like
suspend support.
+config PM_ADVANCED_DEBUG
+ bool "Extra PM attributes in sysfs for low-level debugging/testing"
+ depends on PM_DEBUG
+ default n
+ ---help---
+ Add extra sysfs attributes allowing one to access some Power Management
+ fields of device objects from user space. If you are not a kernel
+ developer interested in debugging/testing Power Management, say "no".
+
config PM_VERBOSE
bool "Verbose Power Management debugging"
depends on PM_DEBUG
@@ -85,6 +94,11 @@
depends on SUSPEND || HIBERNATION || XEN_SAVE_RESTORE
default y
+config PM_SLEEP_ADVANCED_DEBUG
+ bool
+ depends on PM_ADVANCED_DEBUG
+ default n
+
config SUSPEND
bool "Suspend to RAM and standby"
depends on PM && ARCH_SUSPEND_POSSIBLE