[PATCH] i8042 / PM: Allow PC keyboard to wake up from suspend-to-idle

From: Rafael J. Wysocki
Date: Mon Mar 09 2015 - 10:56:19 EST

From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>

If they keyboard interrupt is registered, mark the i8042 platform
device as wakeup-capable and check the user space wakeup setting in
i8042_pm_suspend() and i8042_pm_resume() to enable or disable,
respectively, the keyboard interrupt to wake up the system.

This makes it possible to use the PC keyboard to wake up the system
from suspend-to-idle after writing "enabled" to the i8042 device's
power/wakeup sysfs attribute.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
drivers/input/serio/i8042.c | 6 ++++++
1 file changed, 6 insertions(+)

Index: linux-pm/drivers/input/serio/i8042.c
--- linux-pm.orig/drivers/input/serio/i8042.c
+++ linux-pm/drivers/input/serio/i8042.c
@@ -1163,12 +1163,17 @@ static int i8042_controller_resume(bool
static int i8042_pm_suspend(struct device *dev)
+ if (device_may_wakeup(&i8042_platform_device->dev))
+ enable_irq_wake(I8042_KBD_IRQ);

return 0;

static int i8042_pm_resume(struct device *dev)
+ if (device_may_wakeup(&i8042_platform_device->dev))
+ disable_irq_wake(I8042_KBD_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
@@ -1406,6 +1411,7 @@ static int __init i8042_setup_kbd(void)
if (error)
goto err_free_irq;

+ device_set_wakeup_capable(&i8042_platform_device->dev, true);
i8042_kbd_irq_registered = true;
return 0;

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