[PATCH 1/3] mfd: max8925: add function to work as wakeup source

Haojian Zhuang
2012-01-04T07:07:41Z

From: Kevin Liu <kliu5@marvell.com>

Signed-off-by: Kevin Liu <kliu5@marvell.com>
Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
---
drivers/mfd/max8925-i2c.c | 27 +++++++++++++++++++++++++++
include/linux/mfd/max8925.h | 2 ++
2 files changed, 29 insertions(+), 0 deletions(-)

diff --git a/drivers/mfd/max8925-i2c.c b/drivers/mfd/max8925-i2c.c
index 0219115..d9e4b36 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 5259dfe..daaba00 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 {
--
1.7.0.4