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ACPI: EC: Return bool from acpi_ec_dispatch_gpe() 

On some systems, if suspend-to-idle is used, the EC may signal system
wakeup events (power button events, for example) as well as events
that should not cause the system to resume and acpi_ec_dispatch_gpe()
needs to be called to determine whether or not the system should
resume then.  In particular, if acpi_ec_dispatch_gpe() doesn't detect
any EC events at all, the system should remain suspended, so it is
useful to know when that is the case.

For this reason, make acpi_ec_dispatch_gpe() return a bool value
indicating whether or not any EC events have been detected by it.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
alistair/sunxi64-5.4-dsi
Rafael J. Wysocki 2019-07-15 13:03:39 +02:00
parent 6921de898b
commit 9089f16e05
2 changed files with 9 additions and 4 deletions
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11
drivers/acpi/ec.c
View File

@ -1060,10 +1060,15 @@ void acpi_ec_set_gpe_wake_mask(u8 action)
acpi_set_gpe_wake_mask(NULL, first_ec->gpe, action);
}
void acpi_ec_dispatch_gpe(void)
bool acpi_ec_dispatch_gpe(void)
{
if (first_ec)
acpi_dispatch_gpe(NULL, first_ec->gpe);
u32 ret;
if (!first_ec)
return false;
ret = acpi_dispatch_gpe(NULL, first_ec->gpe);
return ret == ACPI_INTERRUPT_HANDLED;
}
/* --------------------------------------------------------------------------

2
drivers/acpi/internal.h
View File

@ -196,7 +196,7 @@ void acpi_ec_block_transactions(void);
void acpi_ec_unblock_transactions(void);
void acpi_ec_mark_gpe_for_wake(void);
void acpi_ec_set_gpe_wake_mask(u8 action);
void acpi_ec_dispatch_gpe(void);
bool acpi_ec_dispatch_gpe(void);
int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit,
acpi_handle handle, acpi_ec_query_func func,
void *data);