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| author | Alex Chiang <achiang@hp.com> | 2010-01-20 00:06:30 -0700 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2010-01-22 12:39:21 -0500 |
| commit | 0406ad336c066190770cbf350b552d608e43ed09 (patch) | |
| tree | df28a11d63cfb489cf2db4d30bc65335668a66d9 | |
| parent | 92dcffb916d309aa01778bf8963a6932e4014d07 (diff) | |
| download | linux-stable-0406ad336c066190770cbf350b552d608e43ed09.tar.gz linux-stable-0406ad336c066190770cbf350b552d608e43ed09.tar.bz2 linux-stable-0406ad336c066190770cbf350b552d608e43ed09.zip | |
ACPI: processor: add kernel command line support for early _PDC eval
Allow platforms not listed in DMI table
to opt-in and evaluate _PDC early.
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
| -rw-r--r-- | Documentation/kernel-parameters.txt | 4 | ||||
| -rw-r--r-- | drivers/acpi/processor_pdc.c | 7 |
2 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 736d45602886..826b6e148316 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -199,6 +199,10 @@ and is between 256 and 4096 characters. It is defined in the file acpi_display_output=video See above. + acpi_early_pdc_eval [HW,ACPI] Evaluate processor _PDC methods + early. Needed on some platforms to properly + initialize the EC. + acpi_irq_balance [HW,ACPI] ACPI will balance active IRQs default in APIC mode diff --git a/drivers/acpi/processor_pdc.c b/drivers/acpi/processor_pdc.c index 7247819dbd80..3bbafe9576ae 100644 --- a/drivers/acpi/processor_pdc.c +++ b/drivers/acpi/processor_pdc.c @@ -151,6 +151,13 @@ static int set_early_pdc_optin(const struct dmi_system_id *id) return 0; } +static int param_early_pdc_optin(char *s) +{ + early_pdc_optin = 1; + return 1; +} +__setup("acpi_early_pdc_eval", param_early_pdc_optin); + static struct dmi_system_id __cpuinitdata early_pdc_optin_table[] = { { set_early_pdc_optin, "HP Envy", { |