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-rw-r--r--kernel/power/Kconfig23
1 files changed, 22 insertions, 1 deletions
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
index 8e186c6..06a08f7 100644
--- a/kernel/power/Kconfig
+++ b/kernel/power/Kconfig
@@ -44,9 +44,30 @@ config PM_VERBOSE
---help---
This option enables verbose messages from the Power Management code.
+config CAN_PM_TRACE
+ def_bool y
+ depends on PM_DEBUG && PM_SLEEP && EXPERIMENTAL
+
config PM_TRACE
+ bool
+ help
+ This enables code to save the last PM event point across
+ reboot. The architecture needs to support this, x86 for
+ example does by saving things in the RTC, see below.
+
+ The architecture specific code must provide the extern
+ functions from <linux/resume-trace.h> as well as the
+ <asm/resume-trace.h> header with a TRACE_RESUME() macro.
+
+ The way the information is presented is architecture-
+ dependent, x86 will print the information during a
+ late_initcall.
+
+config PM_TRACE_RTC
bool "Suspend/resume event tracing"
- depends on PM_DEBUG && X86 && PM_SLEEP && EXPERIMENTAL
+ depends on CAN_PM_TRACE
+ depends on X86
+ select PM_TRACE
default n
---help---
This enables some cheesy code to save the last PM event point in the
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