Merge tag 'driver-core-4.13-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git...

[karo-tx-linux.git] / drivers / acpi / ec.c

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index ddb01e9fa5b225eda5a83cf8a06501ddaded2fc5..62068a5e814f026a44e212bd2b93941590a3fe53 100644 (file)
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -151,6 +151,10 @@ static bool ec_freeze_events __read_mostly = false;
 module_param(ec_freeze_events, bool, 0644);
 MODULE_PARM_DESC(ec_freeze_events, "Disabling event handling during suspend/resume");
 
+static bool ec_no_wakeup __read_mostly;
+module_param(ec_no_wakeup, bool, 0644);
+MODULE_PARM_DESC(ec_no_wakeup, "Do not wake up from suspend-to-idle");
+
 struct acpi_ec_query_handler {
        struct list_head node;
        acpi_ec_query_func func;
@@ -535,6 +539,14 @@ static void acpi_ec_disable_event(struct acpi_ec *ec)
        spin_unlock_irqrestore(&ec->lock, flags);
        __acpi_ec_flush_event(ec);
 }
+
+void acpi_ec_flush_work(void)
+{
+       if (first_ec)
+               __acpi_ec_flush_event(first_ec);
+
+       flush_scheduled_work();
+}
 #endif /* CONFIG_PM_SLEEP */
 
 static bool acpi_ec_guard_event(struct acpi_ec *ec)
@@ -1880,6 +1892,32 @@ static int acpi_ec_suspend(struct device *dev)
        return 0;
 }
 
+static int acpi_ec_suspend_noirq(struct device *dev)
+{
+       struct acpi_ec *ec = acpi_driver_data(to_acpi_device(dev));
+
+       /*
+        * The SCI handler doesn't run at this point, so the GPE can be
+        * masked at the low level without side effects.
+        */
+       if (ec_no_wakeup && test_bit(EC_FLAGS_STARTED, &ec->flags) &&
+           ec->reference_count >= 1)
+               acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_DISABLE);
+
+       return 0;
+}
+
+static int acpi_ec_resume_noirq(struct device *dev)
+{
+       struct acpi_ec *ec = acpi_driver_data(to_acpi_device(dev));
+
+       if (ec_no_wakeup && test_bit(EC_FLAGS_STARTED, &ec->flags) &&
+           ec->reference_count >= 1)
+               acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_ENABLE);
+
+       return 0;
+}
+
 static int acpi_ec_resume(struct device *dev)
 {
        struct acpi_ec *ec =
@@ -1891,6 +1929,7 @@ static int acpi_ec_resume(struct device *dev)
 #endif
 
 static const struct dev_pm_ops acpi_ec_pm = {
+       SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(acpi_ec_suspend_noirq, acpi_ec_resume_noirq)
        SET_SYSTEM_SLEEP_PM_OPS(acpi_ec_suspend, acpi_ec_resume)
 };