staging: sm7xx: smtcfb.c: Use the new PCI PM

The sm7xx driver uses the legacy PCI power management (suspend and
resume) callbacks.

This patch adds the new PCI PM and let the PCI core code handles the
PCI-specific details of power transitions.

Tested in 2.6.38, including standby and hibernation support.
Tested-by: Wu Zhangjin <wuzhangjin@gmail.com>
Signed-off-by: Javier M. Mellid <jmunhoz@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/sm7xx/smtcfb.c

@@ -1016,13 +1016,10 @@ static void __devexit smtcfb_pci_remove(struct pci_dev *pdev)
 }
 
 #ifdef CONFIG_PM
-/* Jason (08/14/2009)
- * suspend function, called when the suspend event is triggered
- */
-static int __maybe_unused smtcfb_suspend(struct pci_dev *pdev, pm_message_t msg)
+static int smtcfb_pci_suspend(struct device *device)
 {
+	struct pci_dev *pdev = to_pci_dev(device);
 	struct smtcfb_info *sfb;
-	int retv;
 
 	sfb = pci_get_drvdata(pdev);
 
@@ -1032,25 +1029,9 @@ static int __maybe_unused smtcfb_suspend(struct pci_dev *pdev, pm_message_t msg)
 	smtc_seqw(0x20, (smtc_seqr(0x20) | 0xc0));
 	smtc_seqw(0x69, (smtc_seqr(0x69) & 0xf7));
 
-	switch (msg.event) {
-	case PM_EVENT_FREEZE:
-	case PM_EVENT_PRETHAW:
-		pdev->dev.power.power_state = msg;
-		return 0;
-	}
-
-	/* when doing suspend, call fb apis and pci apis */
-	if (msg.event == PM_EVENT_SUSPEND) {
-		console_lock();
-		fb_set_suspend(&sfb->fb, 1);
-		console_unlock();
-		retv = pci_save_state(pdev);
-		pci_disable_device(pdev);
-		retv = pci_choose_state(pdev, msg);
-		retv = pci_set_power_state(pdev, retv);
-	}
-
-	pdev->dev.power.power_state = msg;
+	console_lock();
+	fb_set_suspend(&sfb->fb, 1);
+	console_unlock();
 
 	/* additionally turn off all function blocks including internal PLLs */
 	smtc_seqw(0x21, 0xff);
@@ -1058,22 +1039,13 @@ static int __maybe_unused smtcfb_suspend(struct pci_dev *pdev, pm_message_t msg)
 	return 0;
 }
 
-static int __maybe_unused smtcfb_resume(struct pci_dev *pdev)
+static int smtcfb_pci_resume(struct device *device)
 {
+	struct pci_dev *pdev = to_pci_dev(device);
 	struct smtcfb_info *sfb;
-	int retv;
 
 	sfb = pci_get_drvdata(pdev);
 
-	/* when resuming, restore pci data and fb cursor */
-	if (pdev->dev.power.power_state.event != PM_EVENT_FREEZE) {
-		retv = pci_set_power_state(pdev, PCI_D0);
-		pci_restore_state(pdev);
-		if (pci_enable_device(pdev))
-			return -1;
-		pci_set_master(pdev);
-	}
-
 	/* reinit hardware */
 	sm7xx_init_hw();
 	switch (hw.chipID) {
@@ -1108,22 +1080,30 @@ static int __maybe_unused smtcfb_resume(struct pci_dev *pdev)
 
 	return 0;
 }
-#endif
 
-/* Jason (08/13/2009)
- * pci_driver struct used to wrap the original driver
- * so that it can be registered into the kernel and
- * the proper method would be called when suspending and resuming
- */
+static const struct dev_pm_ops sm7xx_pm_ops = {
+	.suspend = smtcfb_pci_suspend,
+	.resume = smtcfb_pci_resume,
+	.freeze = smtcfb_pci_suspend,
+	.thaw = smtcfb_pci_resume,
+	.poweroff = smtcfb_pci_suspend,
+	.restore = smtcfb_pci_resume,
+};
+
+#define SM7XX_PM_OPS (&sm7xx_pm_ops)
+
+#else  /* !CONFIG_PM */
+
+#define SM7XX_PM_OPS NULL
+
+#endif /* !CONFIG_PM */
+
 static struct pci_driver smtcfb_driver = {
 	.name = "smtcfb",
 	.id_table = smtcfb_pci_table,
 	.probe = smtcfb_pci_probe,
 	.remove = __devexit_p(smtcfb_pci_remove),
-#ifdef CONFIG_PM
-	.suspend = smtcfb_suspend,
-	.resume = smtcfb_resume,
-#endif
+	.driver.pm  = SM7XX_PM_OPS,
 };
 
 static int __init smtcfb_init(void)