ARM: at91: pm: add at91_suspend_entering_backup()

Add at91_suspend_entering_backup() to check if platform enters backup and
self-refresh mode.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>

Author: claudiubeznea

arch/arm/mach-at91/pm.c

@@ -149,6 +149,12 @@ int at91_suspend_entering_slow_clock(void)
 }
 EXPORT_SYMBOL(at91_suspend_entering_slow_clock);
 
+int at91_suspend_entering_backup(void)
+{
+	return (pm_data.mode == AT91_PM_BACKUP);
+}
+EXPORT_SYMBOL(at91_suspend_entering_backup);
+
 static void (*at91_suspend_sram_fn)(struct at91_pm_data *);
 extern void at91_pm_suspend_in_sram(struct at91_pm_data *pm_data);
 extern u32 at91_pm_suspend_in_sram_sz;

include/linux/platform_data/atmel.h

@@ -22,11 +22,16 @@ struct at91_cf_data {
 /* FIXME: this needs a better location, but gets stuff building again */
 #ifdef CONFIG_ATMEL_PM
 extern int at91_suspend_entering_slow_clock(void);
+extern int at91_suspend_entering_backup(void);
 #else
 static inline int at91_suspend_entering_slow_clock(void)
 {
 	return 0;
 }
+static inline int at91_suspend_entering_backup(void)
+{
+	return 0;
+}
 #endif
 
 #endif /* __ATMEL_H__ */