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extcon: adc-jack: add suspend/resume support 

adding suspend and resume funtionality for extcon-adc-jack
driver to configure system wake up for extcon events,
also adding support to enable/disable system wakeup
through flag wakeup_source based on platform requirement.

Signed-off-by: Venkat Reddy Talla <vreddytalla@nvidia.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
This commit is contained in:
Venkat Reddy Talla 2016-06-30 17:54:00 +09:00 committed by Chanwoo Choi
parent 5d5c4c139d
commit 1b6cf31010
2 changed files with 36 additions and 0 deletions
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34
drivers/extcon/extcon-adc-jack.c
View File

@ -38,6 +38,7 @@
* @chan: iio channel being queried.
*/
struct adc_jack_data {
struct device *dev;
struct extcon_dev *edev;
const unsigned int **cable_names;
@ -49,6 +50,7 @@ struct adc_jack_data {
struct delayed_work handler;
struct iio_channel *chan;
bool wakeup_source;
};
static void adc_jack_handler(struct work_struct *work)
@ -105,6 +107,7 @@ static int adc_jack_probe(struct platform_device *pdev)
return -EINVAL;
}
data->dev = &pdev->dev;
data->edev = devm_extcon_dev_allocate(&pdev->dev, pdata->cable_names);
if (IS_ERR(data->edev)) {
dev_err(&pdev->dev, "failed to allocate extcon device\n");
@ -128,6 +131,7 @@ static int adc_jack_probe(struct platform_device *pdev)
return PTR_ERR(data->chan);
data->handling_delay = msecs_to_jiffies(pdata->handling_delay_ms);
data->wakeup_source = pdata->wakeup_source;
INIT_DEFERRABLE_WORK(&data->handler, adc_jack_handler);
@ -151,6 +155,9 @@ static int adc_jack_probe(struct platform_device *pdev)
return err;
}
if (data->wakeup_source)
device_init_wakeup(&pdev->dev, 1);
return 0;
}
@ -165,11 +172,38 @@ static int adc_jack_remove(struct platform_device *pdev)
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int adc_jack_suspend(struct device *dev)
{
struct adc_jack_data *data = dev_get_drvdata(dev);
cancel_delayed_work_sync(&data->handler);
if (device_may_wakeup(data->dev))
enable_irq_wake(data->irq);
return 0;
}
static int adc_jack_resume(struct device *dev)
{
struct adc_jack_data *data = dev_get_drvdata(dev);
if (device_may_wakeup(data->dev))
disable_irq_wake(data->irq);
return 0;
}
#endif /* CONFIG_PM_SLEEP */
static SIMPLE_DEV_PM_OPS(adc_jack_pm_ops,
adc_jack_suspend, adc_jack_resume);
static struct platform_driver adc_jack_driver = {
.probe = adc_jack_probe,
.remove = adc_jack_remove,
.driver = {
.name = "adc-jack",
.pm = &adc_jack_pm_ops,
},
};

2
include/linux/extcon/extcon-adc-jack.h
View File

@ -53,6 +53,7 @@ struct adc_jack_cond {
* milli-seconds after the interrupt occurs. You may
* describe such delays with @handling_delay_ms, which
* is rounded-off by jiffies.
* @wakeup_source: flag to wake up the system for extcon events.
*/
struct adc_jack_pdata {
const char *name;
@ -65,6 +66,7 @@ struct adc_jack_pdata {
unsigned long irq_flags;
unsigned long handling_delay_ms; /* in ms */
bool wakeup_source;
};
#endif /* _EXTCON_ADC_JACK_H */