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

       creation of keyboard port.

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

1 files changed, 18 insertions, 4 deletions

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);