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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-08-10 00:31:58 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-08-17 20:54:33 +0200
commit1312b7e0caca44e7ff312bc2eaa888943384e3e1 (patch)
tree096a21dc5ca3b555a799f2ea7fdebfbfc63d6e58 /include/acpi
parentecc1165b8b743fd1503b9c799ae3a9933b89877b (diff)
downloadlinux-1312b7e0caca44e7ff312bc2eaa888943384e3e1.tar.bz2
ACPICA: Make it possible to enable runtime GPEs earlier
Runtime GPEs have corresponding _Lxx/_Exx methods and are enabled automatically during the initialization of the ACPI subsystem through acpi_update_all_gpes() with the assumption that acpi_setup_gpe_for_wake() will be called in advance for all of the GPEs pointed to by _PRW objects in the namespace that may be affected by acpi_update_all_gpes(). That is, acpi_ev_initialize_gpe_block() can only be called for a GPE block after acpi_setup_gpe_for_wake() has been called for all of the _PRW (wakeup) GPEs in it. The platform firmware on some systems, however, expects GPEs to be enabled before the enumeration of devices which is when acpi_setup_gpe_for_wake() is called and that goes against the above assumption. For this reason, introduce a new flag to be set by acpi_ev_initialize_gpe_block() when automatically enabling a GPE to indicate to acpi_setup_gpe_for_wake() that it needs to drop the reference to the GPE coming from acpi_ev_initialize_gpe_block() and modify acpi_setup_gpe_for_wake() accordingly. These changes allow acpi_setup_gpe_for_wake() and acpi_ev_initialize_gpe_block() to be invoked in any order. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'include/acpi')
-rw-r--r--include/acpi/actypes.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h
index 2fcbaec8b368..71eddf645566 100644
--- a/include/acpi/actypes.h
+++ b/include/acpi/actypes.h
@@ -775,7 +775,7 @@ typedef u32 acpi_event_status;
* | | | | +-- Type of dispatch:to method, handler, notify, or none
* | | | +----- Interrupt type: edge or level triggered
* | | +------- Is a Wake GPE
- * | +--------- Is GPE masked by the software GPE masking mechanism
+ * | +--------- Has been enabled automatically at init time
* +------------ <Reserved>
*/
#define ACPI_GPE_DISPATCH_NONE (u8) 0x00
@@ -791,6 +791,7 @@ typedef u32 acpi_event_status;
#define ACPI_GPE_XRUPT_TYPE_MASK (u8) 0x08
#define ACPI_GPE_CAN_WAKE (u8) 0x10
+#define ACPI_GPE_AUTO_ENABLED (u8) 0x20
/*
* Flags for GPE and Lock interfaces