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| author | Shaohua Li <shaohua.li@intel.com> | 2009-10-29 11:05:05 +0800 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2009-12-16 14:05:34 -0500 |
| commit | 3563ff964fdc36358cef0330936fdac28e65142a (patch) | |
| tree | 5815c93ce3c6adc57f9b8c73113ee77605a1b0ef /drivers/acpi/bus.c | |
| parent | 3a9622dc4659af44a8098a233f65c51e495ff0a5 (diff) | |
| download | linux-3563ff964fdc36358cef0330936fdac28e65142a.tar.gz | |
ACPI: Add platform-wide _OSC support.
Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/bus.c')
| -rw-r--r-- | drivers/acpi/bus.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index 12240be58f27..65f7e335f122 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -466,6 +466,30 @@ out_kfree: } EXPORT_SYMBOL(acpi_run_osc); +static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48"; +static void acpi_bus_osc_support(void) +{ + u32 capbuf[2]; + struct acpi_osc_context context = { + .uuid_str = sb_uuid_str, + .rev = 1, + .cap.length = 8, + .cap.pointer = capbuf, + }; + acpi_handle handle; + + capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE; + capbuf[OSC_SUPPORT_TYPE] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */ +#ifdef CONFIG_ACPI_PROCESSOR_AGGREGATOR + capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PAD_SUPPORT; +#endif + if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) + return; + if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) + kfree(context.ret.pointer); + /* do we need to check the returned cap? Sounds no */ +} + /* -------------------------------------------------------------------------- Event Management -------------------------------------------------------------------------- */ @@ -856,6 +880,8 @@ static int __init acpi_bus_init(void) status = acpi_ec_ecdt_probe(); /* Ignore result. Not having an ECDT is not fatal. */ + acpi_bus_osc_support(); + status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); if (ACPI_FAILURE(status)) { printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); |