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| author | Erik Schmauss <erik.schmauss@intel.com> | 2018-06-01 21:09:43 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-06-06 08:48:00 +0200 |
| commit | fb145901e08056c0fe68c36bb2976529773c3f0b (patch) | |
| tree | 50690c3ea4b721f668135e486707fdcc19587b64 /Documentation/acpi/method-customizing.txt | |
| parent | Merge tag 'acpi-4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ra... (diff) | |
| download | linux-fb145901e08056c0fe68c36bb2976529773c3f0b.tar.xz linux-fb145901e08056c0fe68c36bb2976529773c3f0b.zip | |
ACPI / Documentation: update ACPI customize method feature docs
Reviewed-by: Changzhong Li <changzhong.li@intel.com>
Reviewed-by: Rui Zhang <rui.zhang@intel.com>
Signed-off-by: Erik Schmauss <erik.schmauss@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'Documentation/acpi/method-customizing.txt')
| -rw-r--r-- | Documentation/acpi/method-customizing.txt | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/Documentation/acpi/method-customizing.txt b/Documentation/acpi/method-customizing.txt index a3f598e141f2..7235da975f23 100644 --- a/Documentation/acpi/method-customizing.txt +++ b/Documentation/acpi/method-customizing.txt @@ -16,7 +16,8 @@ control method rather than override the entire DSDT, because kernel rebuild/reboot is not needed and test result can be got in minutes. Note: Only ACPI METHOD can be overridden, any other object types like - "Device", "OperationRegion", are not recognized. + "Device", "OperationRegion", are not recognized. Methods + declared inside scope operators are also not supported. 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)), @@ -32,8 +33,6 @@ Note: To get the ACPI debug object output (Store (AAAA, Debug)), DefinitionBlock ("", "SSDT", 1, "", "", 0x20080715) { - External (ACON) - Method (\_SB_.AC._PSR, 0, NotSerialized) { Store ("In AC _PSR", Debug) @@ -42,9 +41,10 @@ Note: To get the ACPI debug object output (Store (AAAA, Debug)), } Note that the full pathname of the method in ACPI namespace should be used. - And remember to use "External" to declare external objects. e) assemble the file to generate the AML code of the method. - e.g. "iasl psr.asl" (psr.aml is generated as a result) + e.g. "iasl -vw 6084 psr.asl" (psr.aml is generated as a result) + If parameter "-vw 6084" is not supported by your iASL compiler, + please try a newer version. f) mount debugfs by "mount -t debugfs none /sys/kernel/debug" g) override the old method via the debugfs by running "cat /tmp/psr.aml > /sys/kernel/debug/acpi/custom_method" |