bf60x: pm: add smc nor flash syscore ops

Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>

arch/blackfin/mach-bf609/include/mach/pm.h

@@ -18,4 +18,7 @@ extern void bf609_pm_finish(void);
 void bf609_hibernate(void);
 void bfin_sec_raise_irq(unsigned int sid);
 void coreb_enable(void);
+
+int bf609_nor_flash_init(void);
+void bf609_nor_flash_exit(void);
 #endif

arch/blackfin/mach-bf609/pm.c

@@ -11,8 +11,8 @@
 #include <linux/interrupt.h>
 #include <linux/gpio.h>
 #include <linux/irq.h>
-
 #include <linux/delay.h>
+#include <linux/syscore_ops.h>
 
 #include <asm/dpmc.h>
 #include <asm/pm.h>
@@ -293,6 +293,23 @@ static struct bfin_cpu_pm_fns bf609_cpu_pm = {
 	.finish         = bf609_cpu_pm_finish,
 };
 
+#if defined(CONFIG_MTD_PHYSMAP) || defined(CONFIG_MTD_PHYSMAP_MODULE)
+static void smc_pm_syscore_suspend(void)
+{
+	bf609_nor_flash_exit();
+}
+
+static void smc_pm_syscore_resume(void)
+{
+	bf609_nor_flash_init();
+}
+
+static struct syscore_ops smc_pm_syscore_ops = {
+	.suspend        = smc_pm_syscore_suspend,
+	.resume         = smc_pm_syscore_resume,
+};
+#endif
+
 static irqreturn_t test_isr(int irq, void *dev_id)
 {
 	printk(KERN_DEBUG "gpio irq %d\n", irq);
@@ -312,6 +329,10 @@ static int __init bf609_init_pm(void)
 	int irq;
 	int error;
 
+#if defined(CONFIG_MTD_PHYSMAP) || defined(CONFIG_MTD_PHYSMAP_MODULE)
+	register_syscore_ops(&smc_pm_syscore_ops);
+#endif
+
 #ifdef CONFIG_PM_BFIN_WAKE_PE12
 	irq = gpio_to_irq(GPIO_PE12);
 	if (irq < 0) {