Input: usbtouchscreen - extend coordinate range for Generaltouch devices

Generaltouch protocol allows for coordinates in [0, 0xffff] range and
there are devices reporting coordinates as high as 0x7fff so let's update
the driver to reflect that.

Signed-off-by: Roy Yin <yhch@generaltouch.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/input/touchscreen/usbtouchscreen.c b/drivers/input/touchscreen/usbtouchscreen.c
index 09a5e7341bd5..5256123a5228 100644
--- a/drivers/input/touchscreen/usbtouchscreen.c
+++ b/drivers/input/touchscreen/usbtouchscreen.c
@@ -618,8 +618,8 @@ static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
 static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
 {
-        dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1] ;
-        dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3] ;
+        dev->x = (pkt[2] << 8) | pkt[1];
+        dev->y = (pkt[4] << 8) | pkt[3];
         dev->press = pkt[5] & 0xff;
         dev->touch = pkt[0] & 0x01;
 
@@ -809,9 +809,9 @@ static struct usbtouch_device_info usbtouch_dev_info[] = {
 #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
         [DEVTYPE_GENERAL_TOUCH] = {
                 .min_xc         = 0x0,
-                .max_xc         = 0x0500,
+                .max_xc         = 0x7fff,
                 .min_yc         = 0x0,
-                .max_yc         = 0x0500,
+                .max_yc         = 0x7fff,
                 .rept_size      = 7,
                 .read_data      = general_touch_read_data,
         },