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path: root/drivers/extcon/extcon-gpio.c
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Diffstat (limited to 'drivers/extcon/extcon-gpio.c')
-rw-r--r--drivers/extcon/extcon-gpio.c32
1 files changed, 27 insertions, 5 deletions
diff --git a/drivers/extcon/extcon-gpio.c b/drivers/extcon/extcon-gpio.c
index 7e0dff58e49..a63a6b21c9a 100644
--- a/drivers/extcon/extcon-gpio.c
+++ b/drivers/extcon/extcon-gpio.c
@@ -40,6 +40,7 @@ struct gpio_extcon_data {
int irq;
struct delayed_work work;
unsigned long debounce_jiffies;
+ bool check_on_resume;
};
static void gpio_extcon_work(struct work_struct *work)
@@ -103,8 +104,15 @@ static int gpio_extcon_probe(struct platform_device *pdev)
extcon_data->gpio_active_low = pdata->gpio_active_low;
extcon_data->state_on = pdata->state_on;
extcon_data->state_off = pdata->state_off;
+ extcon_data->check_on_resume = pdata->check_on_resume;
if (pdata->state_on && pdata->state_off)
extcon_data->edev.print_state = extcon_gpio_print_state;
+
+ ret = devm_gpio_request_one(&pdev->dev, extcon_data->gpio, GPIOF_DIR_IN,
+ pdev->name);
+ if (ret < 0)
+ return ret;
+
if (pdata->debounce) {
ret = gpio_set_debounce(extcon_data->gpio,
pdata->debounce * 1000);
@@ -117,11 +125,6 @@ static int gpio_extcon_probe(struct platform_device *pdev)
if (ret < 0)
return ret;
- ret = devm_gpio_request_one(&pdev->dev, extcon_data->gpio, GPIOF_DIR_IN,
- pdev->name);
- if (ret < 0)
- goto err;
-
INIT_DELAYED_WORK(&extcon_data->work, gpio_extcon_work);
extcon_data->irq = gpio_to_irq(extcon_data->gpio);
@@ -159,12 +162,31 @@ static int gpio_extcon_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_PM_SLEEP
+static int gpio_extcon_resume(struct device *dev)
+{
+ struct gpio_extcon_data *extcon_data;
+
+ extcon_data = dev_get_drvdata(dev);
+ if (extcon_data->check_on_resume)
+ queue_delayed_work(system_power_efficient_wq,
+ &extcon_data->work, extcon_data->debounce_jiffies);
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops gpio_extcon_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(NULL, gpio_extcon_resume)
+};
+
static struct platform_driver gpio_extcon_driver = {
.probe = gpio_extcon_probe,
.remove = gpio_extcon_remove,
.driver = {
.name = "extcon-gpio",
.owner = THIS_MODULE,
+ .pm = &gpio_extcon_pm_ops,
},
};