[rft]basic power management methods for usbtouch
From: Oliver Neukum <hidden>
Date: 2009-11-25 21:55:13
Subsystem:
input (keyboard, mouse, joystick, touchscreen) drivers, the rest · Maintainers:
Dmitry Torokhov, Linus Torvalds
Hi, this is supposed to implement the basic power management methods for usbtouchscreen. Please test. Regards Oliver --
diff --git a/drivers/input/touchscreen/usbtouchscreen.c b/drivers/input/touchscreen/usbtouchscreen.c
index 68ece58..28e30af 100644
--- a/drivers/input/touchscreen/usbtouchscreen.c
+++ b/drivers/input/touchscreen/usbtouchscreen.c@@ -946,6 +946,52 @@ 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) + result = usb_submit_urb(usbtouch->irq, GFP_NOIO); + mutex_unlock(&input->mutex); + return result; +} + +static int usbtouch_reset_resume(struct usb_interface *intf) +{ + struct usbtouch_usb *usbtouch = usb_get_intfdata(intf); + struct input_dev *input = usbtouch->input; + int err = 0; + + /* reinit the device */ + if (usbtouch->type->init) { + err = usbtouch->type->init(usbtouch); + if (err) { + dbg("%s - type->init() failed, err: %d", + __func__, err); + return err; + } + } + + /* restart IO if needed */ + mutex_lock(&input->mutex); + if (input->users) + err = usb_submit_urb(usbtouch->irq, GFP_NOIO); + mutex_unlock(&input->mutex); + + return err; +} static void usbtouch_free_buffers(struct usb_device *udev, struct usbtouch_usb *usbtouch)
@@ -1100,6 +1146,9 @@ static struct usb_driver usbtouch_driver = { .name = "usbtouchscreen", .probe = usbtouch_probe, .disconnect = usbtouch_disconnect, + .suspend = usbtouch_suspend, + .resume = usbtouch_resume, + .reset_resume = usbtouch_reset_resume, .id_table = usbtouch_devices, }; --
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