>From fd33bdb2357c439c8e4b1435bfd8c7dc77ac4da8 Mon Sep 17 00:00:00 2001
From: Oliver Neukum <oliver@xxxxxxxxxx>
Date: Thu, 11 Mar 2010 14:45:18 +0100
Subject: [PATCH 1/5] USB: usbtouch: implement suspend/resume
A standard implementation of suspend/resume.
Cease IO on suspend(). Restart on resume() if necessary.
Signed-off-by: Oliver Neukum <neukum@xxxxxxxxxxxxx>
---
drivers/input/touchscreen/usbtouchscreen.c | 24 ++++++++++++++++++++++++
1 files changed, 24 insertions(+), 0 deletions(-)
diff --git a/drivers/input/touchscreen/usbtouchscreen.c b/drivers/input/touchscreen/usbtouchscreen.c
index 99330bb..6db0a03 100644
--- a/drivers/input/touchscreen/usbtouchscreen.c
+++ b/drivers/input/touchscreen/usbtouchscreen.c
@@ -115,6 +115,7 @@ struct usbtouch_usb {
int x, y;
int touch, press;
+ bool submitted;
};
@@ -1274,6 +1275,7 @@ static int usbtouch_open(struct input_dev *input)
if (!usbtouch->type->irq_always) {
if (usb_submit_urb(usbtouch->irq, GFP_KERNEL))
return -EIO;
+ usbtouch->submitted = true;
}
return 0;
@@ -1283,10 +1285,30 @@ static void usbtouch_close(struct input_dev *input)
{
struct usbtouch_usb *usbtouch = input_get_drvdata(input);
+ usbtouch->submitted = false;
if (!usbtouch->type->irq_always)
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);
+ int rv = 0;
+
+ if (usbtouch->submitted || usbtouch->type->irq_always)
+ rv = usb_submit_urb(usbtouch->irq, GFP_NOIO);
+
+ return rv;
+}
static void usbtouch_free_buffers(struct usb_device *udev,
struct usbtouch_usb *usbtouch)
@@ -1477,6 +1499,8 @@ static struct usb_driver usbtouch_driver = {
.name = "usbtouchscreen",
.probe = usbtouch_probe,
.disconnect = usbtouch_disconnect,
+ .suspend = usbtouch_suspend,
+ .resume = usbtouch_resume,
.id_table = usbtouch_devices,
};
--
1.6.4.2
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