Input: elantech - allow forcing Elantech protocol

[sfrench/cifs-2.6.git] / drivers / input / mouse / elantech.c

diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
index 28eba48e68fda4ac29cd1f913238147496d73c23..095bd388c6dd954169340f1875ee3ee2562e93fd 100644 (file)
--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -24,6 +24,10 @@
                        printk(KERN_DEBUG format, ##arg);       \
        } while (0)
 
+static bool force_elantech;
+module_param_named(force_elantech, force_elantech, bool, 0644);
+MODULE_PARM_DESC(force_elantech, "Force the Elantech PS/2 protocol extension to be used, 1 = enabled, 0 = disabled (default).");
+
 /*
  * Send a Synaptics style sliced query command
  */
@@ -595,8 +599,12 @@ int elantech_detect(struct psmouse *psmouse, bool set_properties)
                 param[0], param[1], param[2]);
 
        if (param[0] == 0 || param[1] != 0) {
-               pr_debug("elantech.c: Probably not a real Elantech touchpad. Aborting.\n");
-               return -1;
+               if (!force_elantech) {
+                       pr_debug("elantech.c: Probably not a real Elantech touchpad. Aborting.\n");
+                       return -1;
+               }
+
+               pr_debug("elantech.c: Probably not a real Elantech touchpad. Enabling anyway due to force_elantech.\n");
        }
 
        if (set_properties) {