Commit 0e4da5cb authored by Jonathan Brett's avatar Jonathan Brett Committed by Greg Kroah-Hartman
Browse files

Staging: asus_oled: Add suspend/resume callbacks 



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

Signed-off-by: default avatarJonathan Brett <jonbrett.dev@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 411c076a

drivers/staging/asus_oled/asus_oled.c

+35 −0
Original line number Diff line number Diff line
@@ -137,6 +137,7 @@ struct asus_oled_dev { 
	size_t			buf_size;

	char			*buf;

	uint8_t			enabled;

	uint8_t			enabled_post_resume;

	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");

}



#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 = {

	.name =		ASUS_OLED_NAME,

	.probe =	asus_oled_probe,

	.disconnect =	asus_oled_disconnect,

	.id_table =	id_table,

	.suspend =	asus_oled_suspend,

	.resume =	asus_oled_resume,

};



static CLASS_ATTR_STRING(version, S_IRUGO,