diff options
| author | MyungJoo Ham <myungjoo.ham@samsung.com> | 2011-08-19 09:39:40 +0400 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2011-10-24 16:09:11 +0400 |
| commit | 01fdaab8ffced1deeee14d9c7d2745f37349484e (patch) | |
| tree | bed9ea0b9bdface7747ca7b472b53f970f696134 /drivers | |
| parent | 5f40c6b6508b622ea03c6b32c57b2e26eba2e4f1 (diff) | |
| download | linux-01fdaab8ffced1deeee14d9c7d2745f37349484e.tar.xz | |
mfd: Wake-up from Suspend MAX8997 support
- Support wake-up from suspend-to-ram.
- Handle pending interrupt after a resume.
- If pdata->wakeup is enabled, by default, the device is assumed to be
capable of wakeup (the interrupt pin is connected to a wakeup-source GPIO)
and may wakeup the system (MAX8997 has a power button input pin).
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mfd/max8997.c | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/drivers/mfd/max8997.c b/drivers/mfd/max8997.c index f83103b8970d..dc58750bb71b 100644 --- a/drivers/mfd/max8997.c +++ b/drivers/mfd/max8997.c @@ -23,6 +23,7 @@ #include <linux/slab.h> #include <linux/i2c.h> +#include <linux/interrupt.h> #include <linux/pm_runtime.h> #include <linux/mutex.h> #include <linux/mfd/core.h> @@ -142,7 +143,6 @@ static int max8997_i2c_probe(struct i2c_client *i2c, max8997->irq_base = pdata->irq_base; max8997->ono = pdata->ono; - max8997->wakeup = pdata->wakeup; mutex_init(&max8997->iolock); @@ -169,6 +169,9 @@ static int max8997_i2c_probe(struct i2c_client *i2c, if (ret < 0) goto err_mfd; + /* MAX8997 has a power button input. */ + device_init_wakeup(max8997->dev, pdata->wakeup); + return ret; err_mfd: @@ -398,7 +401,29 @@ static int max8997_restore(struct device *dev) return 0; } +static int max8997_suspend(struct device *dev) +{ + struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); + struct max8997_dev *max8997 = i2c_get_clientdata(i2c); + + if (device_may_wakeup(dev)) + irq_set_irq_wake(max8997->irq, 1); + return 0; +} + +static int max8997_resume(struct device *dev) +{ + struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); + struct max8997_dev *max8997 = i2c_get_clientdata(i2c); + + if (device_may_wakeup(dev)) + irq_set_irq_wake(max8997->irq, 0); + return max8997_irq_resume(max8997); +} + const struct dev_pm_ops max8997_pm = { + .suspend = max8997_suspend, + .resume = max8997_resume, .freeze = max8997_freeze, .restore = max8997_restore, }; |