Input: apparently Lifebook touchscreens have double resolution

       compared to "classic" PS/2 mice, provide appropriate
       resolution setting handler.

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

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/input/mouse/lifebook.c b/drivers/input/mouse/lifebook.c
index 1eb98e18c9e7..bd9df9b28325 100644
--- a/drivers/input/mouse/lifebook.c
+++ b/drivers/input/mouse/lifebook.c
@@ -82,6 +82,17 @@ static int lifebook_absolute_mode(struct psmouse *psmouse)
         return 0;
 }
 
+static void lifebook_set_resolution(struct psmouse *psmouse, unsigned int resolution)
+{
+        unsigned char params[] = { 0, 1, 2, 2, 3 };
+
+        if (resolution == 0 || resolution > 400)
+                resolution = 400;
+
+        ps2_command(&psmouse->ps2dev, &params[resolution / 100], PSMOUSE_CMD_SETRES);
+        psmouse->resolution = 50 << params[resolution / 100];
+}
+
 static void lifebook_disconnect(struct psmouse *psmouse)
 {
         psmouse_reset(psmouse);
@@ -113,6 +124,7 @@ int lifebook_init(struct psmouse *psmouse)
         input_set_abs_params(&psmouse->dev, ABS_Y, 0, 1024, 0, 0);
 
         psmouse->protocol_handler = lifebook_process_byte;
+        psmouse->set_resolution = lifebook_set_resolution;
         psmouse->disconnect = lifebook_disconnect;
         psmouse->reconnect  = lifebook_absolute_mode;
         psmouse->pktsize = 3;