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ACPI: introduce module parameter acpi.aml_debug_output

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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 <[email protected]>
Signed-off-by: Len Brown <[email protected]>
This commit is contained in:
Zhang Rui 2010-07-15 10:46:17 +08:00 • committed by Len Brown
commit c637e4861c
4 changed files with 12 additions and 2 deletions
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Documentation/acpi/method-customizing.txt
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@ -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,