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Commit 1729ad1f authored by Dmitry Torokhov's avatar Dmitry Torokhov
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Input: i8042 - also perform controller reset when suspending 

In addition to some laptops needing i8042 reset after resuming from S2R to
get their touchpads working there is another class of laptops - ones that
need i8042 reset before going to S2R, otherwise they will simply reboot
instead of resuming.

See https://bugzilla.kernel.org/show_bug.cgi?id=15612



This change forces reset of i8042 before doing S2R.

Reported-by: default avatarStefan Koch <stefan_koch@gmx.net>
Tested-by: default avatarAlexander van Loon <a.vanloon@alexandervanloon.nl>
Signed-off-by: default avatarDmitry Torokhov <dtor@mail.ru>
parent fb6c721b

drivers/input/serio/i8042.c

+15 −8
Original line number Diff line number Diff line
@@ -991,7 +991,7 @@ static int i8042_controller_init(void) 
 * Reset the controller and reset CRT to the original value set by BIOS.

 */



static void i8042_controller_reset(void)

static void i8042_controller_reset(bool force_reset)

{

	i8042_flush();
@@ -1016,7 +1016,7 @@ static void i8042_controller_reset(void) 
 * Reset the controller if requested.

 */



	if (i8042_reset)

	if (i8042_reset || force_reset)

		i8042_controller_selftest();



/*
@@ -1139,9 +1139,9 @@ static int i8042_controller_resume(bool force_reset) 
 * upsetting it.

 */



static int i8042_pm_reset(struct device *dev)

static int i8042_pm_suspend(struct device *dev)

{

	i8042_controller_reset();

	i8042_controller_reset(true);



	return 0;

}
@@ -1163,13 +1163,20 @@ static int i8042_pm_thaw(struct device *dev) 
	return 0;

}



static int i8042_pm_reset(struct device *dev)

{

	i8042_controller_reset(false);



	return 0;

}



static int i8042_pm_restore(struct device *dev)

{

	return i8042_controller_resume(false);

}



static const struct dev_pm_ops i8042_pm_ops = {

	.suspend	= i8042_pm_reset,

	.suspend	= i8042_pm_suspend,

	.resume		= i8042_pm_resume,

	.thaw		= i8042_pm_thaw,

	.poweroff	= i8042_pm_reset,
@@ -1185,7 +1192,7 @@ static const struct dev_pm_ops i8042_pm_ops = { 


static void i8042_shutdown(struct platform_device *dev)

{

	i8042_controller_reset();

	i8042_controller_reset(false);

}



static int __init i8042_create_kbd_port(void)
@@ -1424,7 +1431,7 @@ static int __init i8042_probe(struct platform_device *dev) 
 out_fail:

	i8042_free_aux_ports();	/* in case KBD failed but AUX not */

	i8042_free_irqs();

	i8042_controller_reset();

	i8042_controller_reset(false);

	i8042_platform_device = NULL;



	return error;
@@ -1434,7 +1441,7 @@ static int __devexit i8042_remove(struct platform_device *dev) 
{

	i8042_unregister_ports();

	i8042_free_irqs();

	i8042_controller_reset();

	i8042_controller_reset(false);

	i8042_platform_device = NULL;



	return 0;