Messages in this thread Patch in this message | | | Date | Fri, 19 Aug 2011 14:39:40 +0900 | From | MyungJoo Ham <> | Subject | [PATCH v2 2/2-resubmit] MFD: MAX8997: Support Wake-up from Suspend |
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- 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> --- Resubmitted to use wakeup interfaces as commented by Mark Brown.
--- drivers/mfd/max8997.c | 27 ++++++++++++++++++++++++++- include/linux/mfd/max8997-private.h | 1 - 2 files changed, 26 insertions(+), 2 deletions(-)
diff --git a/drivers/mfd/max8997.c b/drivers/mfd/max8997.c index f83103b..dc58750 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, }; diff --git a/include/linux/mfd/max8997-private.h b/include/linux/mfd/max8997-private.h index 5ff2400..3f4deb6 100644 --- a/include/linux/mfd/max8997-private.h +++ b/include/linux/mfd/max8997-private.h @@ -326,7 +326,6 @@ struct max8997_dev { int irq; int ono; int irq_base; - bool wakeup; struct mutex irqlock; int irq_masks_cur[MAX8997_IRQ_GROUP_NR]; int irq_masks_cache[MAX8997_IRQ_GROUP_NR]; -- 1.7.4.1
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