Input: i8042 - allow KBD and AUX ports to wake up from suspend-to-idle
While registering serio device for i8042, mark them as wakeup-capable
and check their user space wakeup settings in i8042_pm_suspend() and
i8042_pm_resume() to enable or disable, respectively, their interrupts
to wake up the system.
This makes it possible to use the PC keyboard to wake up the system
from suspend-to-idle, among other things, after writing "enabled" to
the keyboard serio device's power/wakeup sysfs attribute.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
diff --git a/drivers/input/serio/i8042.c b/drivers/input/serio/i8042.c
index 986a71c..cb5ece7 100644
--- a/drivers/input/serio/i8042.c
+++ b/drivers/input/serio/i8042.c
@@ -1162,13 +1162,32 @@
static int i8042_pm_suspend(struct device *dev)
{
+ int i;
+
i8042_controller_reset(true);
+ /* Set up serio interrupts for system wakeup. */
+ for (i = 0; i < I8042_NUM_PORTS; i++) {
+ struct serio *serio = i8042_ports[i].serio;
+
+ if (serio && device_may_wakeup(&serio->dev))
+ enable_irq_wake(i8042_ports[i].irq);
+ }
+
return 0;
}
static int i8042_pm_resume(struct device *dev)
{
+ int i;
+
+ for (i = 0; i < I8042_NUM_PORTS; i++) {
+ struct serio *serio = i8042_ports[i].serio;
+
+ if (serio && device_may_wakeup(&serio->dev))
+ disable_irq_wake(i8042_ports[i].irq);
+ }
+
/*
* On resume from S2R we always try to reset the controller
* to bring it in a sane state. (In case of S2D we expect
@@ -1300,13 +1319,16 @@
int i;
for (i = 0; i < I8042_NUM_PORTS; i++) {
- if (i8042_ports[i].serio) {
+ struct serio *serio = i8042_ports[i].serio;
+
+ if (serio) {
printk(KERN_INFO "serio: %s at %#lx,%#lx irq %d\n",
- i8042_ports[i].serio->name,
+ serio->name,
(unsigned long) I8042_DATA_REG,
(unsigned long) I8042_COMMAND_REG,
i8042_ports[i].irq);
- serio_register_port(i8042_ports[i].serio);
+ serio_register_port(serio);
+ device_set_wakeup_capable(&serio->dev, true);
}
}
}