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Input: i8042 - also perform controller reset when suspending

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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: Stefan Koch <stefan_koch@gmx.net>
Tested-by: Alexander van Loon <a.vanloon@alexandervanloon.nl>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Dmitry Torokhov 2011-10-29 12:37:06 -07:00
parent fb6c721b69
commit 1729ad1f4f
1 changed files with 15 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/input/serio/i8042.c
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@ -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;