mfd: Add pm ops to max8925

Signed-off-by: Kevin Liu <kliu5@marvell.com>
Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

2 files changed, 29 insertions, 0 deletions

diff --git a/drivers/mfd/max8925-i2c.c b/drivers/mfd/max8925-i2c.c
index 0219115e00c7..d9e4b36edee9 100644
--- a/drivers/mfd/max8925-i2c.c
+++ b/drivers/mfd/max8925-i2c.c
@@ -161,6 +161,8 @@ static int __devinit max8925_probe(struct i2c_client *client,
         chip->adc = i2c_new_dummy(chip->i2c->adapter, ADC_I2C_ADDR);
         i2c_set_clientdata(chip->adc, chip);
 
+        device_init_wakeup(&client->dev, 1);
+
         max8925_device_init(chip, pdata);
 
         return 0;
@@ -177,10 +179,35 @@ static int __devexit max8925_remove(struct i2c_client *client)
         return 0;
 }
 
+#ifdef CONFIG_PM_SLEEP
+static int max8925_suspend(struct device *dev)
+{
+        struct i2c_client *client = container_of(dev, struct i2c_client, dev);
+        struct max8925_chip *chip = i2c_get_clientdata(client);
+
+        if (device_may_wakeup(dev) && chip->wakeup_flag)
+                enable_irq_wake(chip->core_irq);
+        return 0;
+}
+
+static int max8925_resume(struct device *dev)
+{
+        struct i2c_client *client = container_of(dev, struct i2c_client, dev);
+        struct max8925_chip *chip = i2c_get_clientdata(client);
+
+        if (device_may_wakeup(dev) && chip->wakeup_flag)
+                disable_irq_wake(chip->core_irq);
+        return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(max8925_pm_ops, max8925_suspend, max8925_resume);
+
 static struct i2c_driver max8925_driver = {
         .driver = {
                 .name   = "max8925",
                 .owner  = THIS_MODULE,
+                .pm     = &max8925_pm_ops,
         },
         .probe          = max8925_probe,
         .remove         = __devexit_p(max8925_remove),
diff --git a/include/linux/mfd/max8925.h b/include/linux/mfd/max8925.h
index 5259dfe8c585..daaba00f0bc5 100644
--- a/include/linux/mfd/max8925.h
+++ b/include/linux/mfd/max8925.h
@@ -206,6 +206,8 @@ struct max8925_chip {
         int                     irq_base;
         int                     core_irq;
         int                     tsc_irq;
+
+        unsigned int            wakeup_flag;
 };
 
 struct max8925_backlight_pdata {