Merge commit 'v3.2-rc3' into next

[firefly-linux-kernel-4.4.55.git] / drivers / input / mouse / elantech.c

diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
index 59bfb70d330a03cd8cd8230e031319544309739c..d2c0db159b18dfc364c2ff7fc036863ef2de9614 100644 (file)
--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -1262,18 +1262,28 @@ static int elantech_reconnect(struct psmouse *psmouse)
  */
 static int elantech_set_properties(struct elantech_data *etd)
 {
+       /* This represents the version of IC body. */
        int ver = (etd->fw_version & 0x0f0000) >> 16;
 
+       /* Early version of Elan touchpads doesn't obey the rule. */
        if (etd->fw_version < 0x020030 || etd->fw_version == 0x020600)
                etd->hw_version = 1;
-       else if (etd->fw_version < 0x150600)
-               etd->hw_version = 2;
-       else if (ver == 5)
-               etd->hw_version = 3;
-       else if (ver == 6)
-               etd->hw_version = 4;
-       else
-               return -1;
+       else {
+               switch (ver) {
+               case 2:
+               case 4:
+                       etd->hw_version = 2;
+                       break;
+               case 5:
+                       etd->hw_version = 3;
+                       break;
+               case 6:
+                       etd->hw_version = 4;
+                       break;
+               default:
+                       return -1;
+               }
+       }
 
        /* decide which send_cmd we're gonna use early */
        etd->send_cmd = etd->hw_version >= 3 ? elantech_send_cmd :