[PATCH v2 -tip][RFC] serial8250: update to dev_pm_ops

[Erik Ekman <erik@kryo.se>]

serial8250: update to dev_pm_ops

>From dmesg:
Platform driver 'serial8250' needs updating - please use dev_pm_ops

Signed-off-by: Erik Ekman <erik@kryo.se>
--
Updated to handle hibernation as understood based on info from Rafael J. Wysocki.
Please let me know if any special handling is needed.

diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index fb867a9..e93222c 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -2982,42 +2982,50 @@ static int __devexit serial8250_remove(struct platform_device *dev)
 	return 0;
 }
 
-static int serial8250_suspend(struct platform_device *dev, pm_message_t state)
+static int serial8250_suspend(struct device *dev)
 {
 	int i;
 
 	for (i = 0; i < UART_NR; i++) {
 		struct uart_8250_port *up = &serial8250_ports[i];
 
-		if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)
+		if (up->port.type != PORT_UNKNOWN && up->port.dev == dev)
 			uart_suspend_port(&serial8250_reg, &up->port);
 	}
 
 	return 0;
 }
 
-static int serial8250_resume(struct platform_device *dev)
+static int serial8250_resume(struct device *dev)
 {
 	int i;
 
 	for (i = 0; i < UART_NR; i++) {
 		struct uart_8250_port *up = &serial8250_ports[i];
 
-		if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)
+		if (up->port.type != PORT_UNKNOWN && up->port.dev == dev)
 			serial8250_resume_port(i);
 	}
 
 	return 0;
 }
 
+static struct dev_pm_ops serial8250_pm_ops = {
+	.resume   = serial8250_resume,
+	.suspend  = serial8250_suspend,
+	.freeze   = serial8250_resume,
+	.thaw     = serial8250_suspend,
+	.restore  = serial8250_resume,
+	.poweroff = serial8250_suspend,
+};
+
 static struct platform_driver serial8250_isa_driver = {
 	.probe		= serial8250_probe,
 	.remove		= __devexit_p(serial8250_remove),
-	.suspend	= serial8250_suspend,
-	.resume		= serial8250_resume,
 	.driver		= {
 		.name	= "serial8250",
 		.owner	= THIS_MODULE,
+		.pm     = &serial8250_pm_ops, 
 	},
 };