ACPI: Add a generic API for _OSC -v2

v2->v1:
.improve debug info as suggedted by Bjorn,Kenji
.API is using uuid string as suggested by Alexey

Add an API to execute _OSC. A lot of devices can have this method, so add a
generic API.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index dfcd920c3e54..3247e09db20d 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -253,6 +253,13 @@ void __init acpi_old_suspend_ordering(void);
 void __init acpi_s4_no_nvs(void);
 #endif /* CONFIG_PM_SLEEP */
 
+struct acpi_osc_context {
+        char *uuid_str; /* uuid string */
+        int rev;
+        struct acpi_buffer cap; /* arg2/arg3 */
+        struct acpi_buffer ret; /* free by caller if success */
+};
+
 #define OSC_QUERY_TYPE                  0
 #define OSC_SUPPORT_TYPE                1
 #define OSC_CONTROL_TYPE                2
@@ -265,6 +272,8 @@ void __init acpi_s4_no_nvs(void);
 #define OSC_INVALID_REVISION_ERROR      8
 #define OSC_CAPABILITIES_MASK_ERROR     16
 
+acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context);
+
 /* _OSC DW1 Definition (OS Support Fields) */
 #define OSC_EXT_PCI_CONFIG_SUPPORT              1
 #define OSC_ACTIVE_STATE_PWR_SUPPORT            2