diff options
Diffstat (limited to 'drivers/input/serio/i8042.c')
| -rw-r--r-- | drivers/input/serio/i8042.c | 37 |
1 files changed, 29 insertions, 8 deletions
diff --git a/drivers/input/serio/i8042.c b/drivers/input/serio/i8042.c index d37a48e..178e75d 100644 --- a/drivers/input/serio/i8042.c +++ b/drivers/input/serio/i8042.c @@ -67,6 +67,10 @@ static bool i8042_notimeout; module_param_named(notimeout, i8042_notimeout, bool, 0); MODULE_PARM_DESC(notimeout, "Ignore timeouts signalled by i8042"); +static bool i8042_kbdreset; +module_param_named(kbdreset, i8042_kbdreset, bool, 0); +MODULE_PARM_DESC(kbdreset, "Reset device connected to KBD port"); + #ifdef CONFIG_X86 static bool i8042_dritek; module_param_named(dritek, i8042_dritek, bool, 0); @@ -783,6 +787,16 @@ static int __init i8042_check_aux(void) return -1; /* + * Reset keyboard (needed on some laptops to successfully detect + * touchpad, e.g., some Gigabyte laptop models with Elantech + * touchpads). + */ + if (i8042_kbdreset) { + pr_warn("Attempting to reset device connected to KBD port\n"); + i8042_kbd_write(NULL, (unsigned char) 0xff); + } + +/* * Test AUX IRQ delivery to make sure BIOS did not grab the IRQ and * used it for a PCI card or somethig else. */ @@ -991,7 +1005,7 @@ 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 +1030,7 @@ static void i8042_controller_reset(void) * Reset the controller if requested. */ - if (i8042_reset) + if (i8042_reset || force_reset) i8042_controller_selftest(); /* @@ -1139,9 +1153,9 @@ 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 +1177,20 @@ 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 +1206,7 @@ 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 +1445,7 @@ 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 +1455,7 @@ 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; |