pda_power: Add function callbacks for suspend and resume

Add function prototypes for power management events so they can be
handled and used by platform implementations.

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Cc: Dmitry Baryshkov <dbaryshkov@gmail.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>

drivers/power/pda_power.c

@@ -404,6 +404,13 @@ static int usb_wakeup_enabled;
 
 static int pda_power_suspend(struct platform_device *pdev, pm_message_t state)
 {
+	if (pdata->suspend) {
+		int ret = pdata->suspend(state);
+
+		if (ret)
+			return ret;
+	}
+
 	if (device_may_wakeup(&pdev->dev)) {
 		if (ac_irq)
 			ac_wakeup_enabled = !enable_irq_wake(ac_irq->start);
@@ -423,6 +430,9 @@ static int pda_power_resume(struct platform_device *pdev)
 			disable_irq_wake(ac_irq->start);
 	}
 
+	if (pdata->resume)
+		return pdata->resume();
+
 	return 0;
 }
 #else

include/linux/pda_power.h

@@ -24,6 +24,8 @@ struct pda_power_pdata {
 	int (*is_usb_online)(void);
 	void (*set_charge)(int flags);
 	void (*exit)(struct device *dev);
+	int (*suspend)(pm_message_t state);
+	int (*resume)(void);
 
 	char **supplied_to;
 	size_t num_supplicants;