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Staging: asus_oled: Add suspend/resume callbacks

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- Add simple suspend/resume PM callbacks to disable oled display on
  suspend and return to previous state on resume

Signed-off-by: Jonathan Brett <jonbrett.dev@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jonathan Brett 2012-08-17 21:13:18 +01:00 committed by Greg Kroah-Hartman
parent 411c076a2e
commit 0e4da5cbae
1 changed files with 35 additions and 0 deletions
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35
drivers/staging/asus_oled/asus_oled.c
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@ -137,6 +137,7 @@ struct asus_oled_dev {
size_t buf_size; size_t buf_size;
char *buf; char *buf;
uint8_t enabled; uint8_t enabled;
uint8_t enabled_post_resume;
struct device *dev; struct device *dev;
}; };
@ -765,11 +766,45 @@ static void asus_oled_disconnect(struct usb_interface *interface)
dev_info(&interface->dev, "Disconnected Asus OLED device\n"); dev_info(&interface->dev, "Disconnected Asus OLED device\n");
} }
#ifdef CONFIG_PM
static int asus_oled_suspend(struct usb_interface *intf, pm_message_t message)
{
struct asus_oled_dev *odev;
odev = usb_get_intfdata(intf);
if (!odev)
return -ENODEV;
odev->enabled_post_resume = odev->enabled;
enable_oled(odev, 0);
return 0;
}
static int asus_oled_resume(struct usb_interface *intf)
{
struct asus_oled_dev *odev;
odev = usb_get_intfdata(intf);
if (!odev)
return -ENODEV;
enable_oled(odev, odev->enabled_post_resume);
return 0;
}
#else
#define asus_oled_suspend NULL
#define asus_oled_resume NULL
#endif
static struct usb_driver oled_driver = { static struct usb_driver oled_driver = {
.name = ASUS_OLED_NAME, .name = ASUS_OLED_NAME,
.probe = asus_oled_probe, .probe = asus_oled_probe,
.disconnect = asus_oled_disconnect, .disconnect = asus_oled_disconnect,
.id_table = id_table, .id_table = id_table,
.suspend = asus_oled_suspend,
.resume = asus_oled_resume,
}; };
static CLASS_ATTR_STRING(version, S_IRUGO, static CLASS_ATTR_STRING(version, S_IRUGO,