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>

diff --git a/drivers/input/touchscreen/usbtouchscreen.c b/drivers/input/touchscreen/usbtouchscreen.c
index 09a5e73..5256123 100644 (file)
--- 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,
        },