Input: i8042 - add i8042.nokbd module option to allow supressing

       creation of keyboard port.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

3 files changed, 22 insertions, 5 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 3d5cd7a09b2f..111e98056195 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -549,6 +549,7 @@ running once the system is up.
                              keyboard and can not control its state
                              (Don't attempt to blink the leds)
         i8042.noaux     [HW] Don't check for auxiliary (== mouse) port
+        i8042.nokbd     [HW] Don't check/create keyboard port
         i8042.nomux     [HW] Don't check presence of an active multiplexing
                              controller
         i8042.nopnp     [HW] Don't use ACPIPnP / PnPBIOS to discover KBD/AUX
diff --git a/drivers/input/serio/i8042-x86ia64io.h b/drivers/input/serio/i8042-x86ia64io.h
index 84a73bc6afdc..d5ea3cf09469 100644
--- a/drivers/input/serio/i8042-x86ia64io.h
+++ b/drivers/input/serio/i8042-x86ia64io.h
@@ -297,6 +297,8 @@ static int __init i8042_pnp_init(void)
                 aux_irq_str);
 
 #if defined(__ia64__)
+        if (result_kbd <= 0)
+                i8042_nokbd = 1;
         if (result_aux <= 0)
                 i8042_noaux = 1;
 #endif
@@ -315,7 +317,7 @@ static int __init i8042_pnp_init(void)
                 i8042_pnp_command_reg = i8042_command_reg;
         }
 
-        if (!i8042_pnp_kbd_irq) {
+        if (!i8042_nokbd && !i8042_pnp_kbd_irq) {
                 printk(KERN_WARNING "PNP: PS/2 controller doesn't have KBD irq; using default %d\n", i8042_kbd_irq);
                 i8042_pnp_kbd_irq = i8042_kbd_irq;
         }
diff --git a/drivers/input/serio/i8042.c b/drivers/input/serio/i8042.c
index 2a76d08c4d3e..19ef35db342e 100644
--- a/drivers/input/serio/i8042.c
+++ b/drivers/input/serio/i8042.c
@@ -27,6 +27,10 @@ MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
 MODULE_DESCRIPTION("i8042 keyboard and mouse controller driver");
 MODULE_LICENSE("GPL");
 
+static unsigned int i8042_nokbd;
+module_param_named(nokbd, i8042_nokbd, bool, 0);
+MODULE_PARM_DESC(nokbd, "Do not probe or use KBD port.");
+
 static unsigned int i8042_noaux;
 module_param_named(noaux, i8042_noaux, bool, 0);
 MODULE_PARM_DESC(noaux, "Do not probe or use AUX (mouse) port.");
@@ -1058,7 +1062,7 @@ static int __init i8042_create_mux_port(int index)
 
 static int __init i8042_init(void)
 {
-        int i;
+        int i, have_ports = 0;
         int err;
 
         dbg_init();
@@ -1100,11 +1104,20 @@ static int __init i8042_init(void)
                         if (err)
                                 goto err_unregister_ports;
                 }
+                have_ports = 1;
         }
 
-        err = i8042_create_kbd_port();
-        if (err)
-                goto err_unregister_ports;
+        if (!i8042_nokbd) {
+                err = i8042_create_kbd_port();
+                if (err)
+                        goto err_unregister_ports;
+                have_ports = 1;
+        }
+
+        if (!have_ports) {
+                err = -ENODEV;
+                goto err_unregister_device;
+        }
 
         mod_timer(&i8042_timer, jiffies + I8042_POLL_PERIOD);
 
@@ -1114,6 +1127,7 @@ static int __init i8042_init(void)
         for (i = 0; i < I8042_NUM_PORTS; i++)
                 if (i8042_ports[i].serio)
                         serio_unregister_port(i8042_ports[i].serio);
+ err_unregister_device:
         platform_device_unregister(i8042_platform_device);
  err_unregister_driver:
         driver_unregister(&i8042_driver);