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Commit 3563ff96 authored by Shaohua Li's avatar Shaohua Li Committed by Len Brown
Browse files

ACPI: Add platform-wide _OSC support. 



Signed-off-by: default avatarShaohua Li <shaohua.li@intel.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 3a9622dc

drivers/acpi/bus.c

+26 −0
Original line number Diff line number Diff line
@@ -466,6 +466,30 @@ acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context) 
}

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");

include/linux/acpi.h

+7 −0
Original line number Diff line number Diff line
@@ -273,6 +273,13 @@ struct acpi_osc_context { 


acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context);



/* platform-wide _OSC bits */

#define OSC_SB_PAD_SUPPORT		1

#define OSC_SB_PPC_OST_SUPPORT		2

#define OSC_SB_PR3_SUPPORT		4

#define OSC_SB_CPUHP_OST_SUPPORT	8

#define OSC_SB_APEI_SUPPORT		16



/* PCI defined _OSC bits */

/* _OSC DW1 Definition (OS Support Fields) */

#define OSC_EXT_PCI_CONFIG_SUPPORT		1