Input: usbtouchscreen - implement basic suspend/resume

This implements basic support for suspend & resume.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Tested-by: Petr Štetiar <ynezz@true.cz>
Tested-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 25 insertions, 0 deletions

diff --git a/drivers/input/touchscreen/usbtouchscreen.c b/drivers/input/touchscreen/usbtouchscreen.c
index b9cee2738adb..9cda660ee7bb 100644
--- a/drivers/input/touchscreen/usbtouchscreen.c
+++ b/drivers/input/touchscreen/usbtouchscreen.c
@@ -1296,6 +1296,29 @@ static void usbtouch_close(struct input_dev *input)
                 usb_kill_urb(usbtouch->irq);
 }
 
+static int usbtouch_suspend
+(struct usb_interface *intf, pm_message_t message)
+{
+        struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
+
+        usb_kill_urb(usbtouch->irq);
+
+        return 0;
+}
+
+static int usbtouch_resume(struct usb_interface *intf)
+{
+        struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
+        struct input_dev *input = usbtouch->input;
+        int result = 0;
+
+        mutex_lock(&input->mutex);
+        if (input->users || usbtouch->type->irq_always)
+                result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
+        mutex_unlock(&input->mutex);
+
+        return result;
+}
 
 static void usbtouch_free_buffers(struct usb_device *udev,
                                   struct usbtouch_usb *usbtouch)
@@ -1486,6 +1509,8 @@ static struct usb_driver usbtouch_driver = {
         .name           = "usbtouchscreen",
         .probe          = usbtouch_probe,
         .disconnect     = usbtouch_disconnect,
+        .suspend        = usbtouch_suspend,
+        .resume         = usbtouch_resume,
         .id_table       = usbtouch_devices,
 };