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authorZhang Rui <rui.zhang@intel.com>2010-07-15 10:46:17 +0800
committerLen Brown <len.brown@intel.com>2010-08-14 23:02:14 -0400
commitc637e4861c7db8165d0f438db3829e7878c96059 (patch)
tree7cb2621815f1861d0e333cced6bf993f1b38c4e0 /Documentation
parenta25ee9200eef07377e1703697afbb5d81f89e500 (diff)
downloadlinux-linaro-android-c637e4861c7db8165d0f438db3829e7878c96059.tar.gz
ACPI: introduce module parameter acpi.aml_debug_output
Introduce module parameter acpi.aml_debug_output. With acpi.aml_debug_output set, we can get AML debug object output (Store (AAA, Debug)), even with CONFIG_ACPI_DEBUG cleared. Together with the runtime custom method mechanism, we can debug AML code problems without rebuilding the kernel. Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/acpi/method-customizing.txt2
1 files changed, 2 insertions, 0 deletions
diff --git a/Documentation/acpi/method-customizing.txt b/Documentation/acpi/method-customizing.txt
index e628cd23ca8..3e1d25aee3f 100644
--- a/Documentation/acpi/method-customizing.txt
+++ b/Documentation/acpi/method-customizing.txt
@@ -19,6 +19,8 @@ Note: Only ACPI METHOD can be overridden, any other object types like
"Device", "OperationRegion", are not recognized.
Note: The same ACPI control method can be overridden for many times,
and it's always the latest one that used by Linux/kernel.
+Note: To get the ACPI debug object output (Store (AAAA, Debug)),
+ please run "echo 1 > /sys/module/acpi/parameters/aml_debug_output".
1. override an existing method
a) get the ACPI table via ACPI sysfs I/F. e.g. to get the DSDT,