From 0406ad336c066190770cbf350b552d608e43ed09 Mon Sep 17 00:00:00 2001 From: Alex Chiang Date: Wed, 20 Jan 2010 00:06:30 -0700 Subject: [PATCH] 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 Signed-off-by: Len Brown --- Documentation/kernel-parameters.txt | 4 ++++ drivers/acpi/processor_pdc.c | 7 +++++++ 2 files changed, 11 insertions(+) diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 736d4560288..826b6e14831 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 7247819dbd8..3bbafe9576a 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", { -- 2.11.4.GIT