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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 /drivers
parenta25ee9200eef07377e1703697afbb5d81f89e500 (diff)
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 'drivers')
-rw-r--r--drivers/acpi/acpica/acglobal.h2
-rw-r--r--drivers/acpi/debugfs.c8
2 files changed, 9 insertions, 1 deletions
diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h
index 899d68afc3c..92122292ef1 100644
--- a/drivers/acpi/acpica/acglobal.h
+++ b/drivers/acpi/acpica/acglobal.h
@@ -115,7 +115,7 @@ u8 ACPI_INIT_GLOBAL(acpi_gbl_use_default_register_widths, TRUE);
/*
* Optionally enable output from the AML Debug Object.
*/
-u8 ACPI_INIT_GLOBAL(acpi_gbl_enable_aml_debug_object, FALSE);
+u32 ACPI_INIT_GLOBAL(acpi_gbl_enable_aml_debug_object, FALSE);
/*
* Optionally copy the entire DSDT to local memory (instead of simply
diff --git a/drivers/acpi/debugfs.c b/drivers/acpi/debugfs.c
index abfcf9f6e76..7de27d49c4b 100644
--- a/drivers/acpi/debugfs.c
+++ b/drivers/acpi/debugfs.c
@@ -12,6 +12,14 @@
#define _COMPONENT ACPI_SYSTEM_COMPONENT
ACPI_MODULE_NAME("debugfs");
+
+/* /sys/modules/acpi/parameters/aml_debug_output */
+
+module_param_named(aml_debug_output, acpi_gbl_enable_aml_debug_object,
+ bool, 0644);
+MODULE_PARM_DESC(aml_debug_output,
+ "To enable/disable the ACPI Debug Object output.");
+
/* /sys/kernel/debug/acpi/custom_method */
static ssize_t cm_write(struct file *file, const char __user * user_buf,